PROSPECTUS

Ideal Power Inc.

3,250,814 Shares

Common Stock

This prospectus relates to the offer, resale, transfer or other disposition, from time to time in one or more offerings, of up to 3,250,814 shares of our common stock, including 2,705,864 shares of our common stock issuable upon exercise of the Purchase Warrants, the Placement Agent Warrant and the Pre-Funded Warrants (each as defined herein), by the selling stockholders identified in this prospectus or in supplements to this prospectus (together with any of such selling stockholders’ transferees, pledgees, donees or successors, collectively, the “selling stockholders”).

We are registering the resale of the common stock as required by the Registration Rights Agreement (as defined herein) we entered into with the selling stockholders. We will not receive any proceeds from the sale of our common stock by the selling stockholders pursuant to this prospectus, other than any proceeds from the cash exercise of the Purchase Warrants, the Placement Agent Warrant and the Pre-Funded Warrants, but we have agreed to bear certain registration expenses, other than underwriting discounts, selling commissions and brokerage fees.

The selling stockholders from time to time may offer and resell the common stock covered by this prospectus and any prospectus supplement on any stock exchange, market, or trading facility on which the shares are traded or in private transactions, to or through one or more underwriters, broker-dealers and agents, or directly to purchasers, or through a combination of these methods, on terms to be determined at the time of sale, such as at fixed prices, at prevailing market prices at the time of sale, at prices related to the prevailing market price, at varying prices determined at the time of sale, or at negotiated prices, as described in more detail in this prospectus. If any underwriters, dealers or agents are involved in the sale of any of the shares of our common stock, their names, and any applicable purchase price, fee, commission or discount arrangement with, between or among them, will be set forth, or will be calculable from the information set forth, in an accompanying prospectus supplement. See “About this Prospectus” and “Plan of Distribution” for more information.

The registration of the shares of common stock to which this prospectus relates does not require the selling stockholders to sell any of their shares of our common stock. We cannot predict when or in what amounts the selling stockholders may sell any of the shares of our common stock covered by this prospectus.

Our common stock is listed on the Nasdaq Capital Market (“Nasdaq”) under the symbol “IPWR.” On December 20, 2019, the last reported sales price of our common stock, as reported on Nasdaq was $2.48 per share.

Investing in our common stock involves certain risks. See “Risk Factors” on page 4 of this prospectus, any applicable prospectus supplement, as well as the “Risk Factors” incorporated by reference herein from our most recent Annual Report on Form 10-K, our Quarterly Reports on Form 10-Q and other reports and information that we file with the Securities and Exchange Commission.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or passed upon the adequacy or accuracy of this prospectus. Any representation to the contrary is a criminal offense.

The date of this prospectus is December 23, 2019

TABLE OF CONTENTS

ABOUT THIS PROSPECTUS

This prospectus is part of a registration statement on Form S-3 that we filed with the Securities and Exchange Commission (the “SEC”) using a “shelf” registration process.

Under this shelf registration process, the selling stockholders named herein or to be named in a supplement to this prospectus may sell up to 3,250,814 shares of our common stock, including 2,705,864 shares issuable upon exercise of the Purchase Warrants, the Placement Agent Warrant and the Pre-Funded Warrants, from time to time in one or more offerings. This prospectus provides you with a general description of the shares of common stock that the selling stockholders may offer. Each time that any of the selling stockholders offer and sell shares of common stock using this prospectus, to the extent necessary, we may provide you with a prospectus supplement to this prospectus that will contain specific information about the offering, the selling stockholders, as well as specific amounts, prices and terms of the shares of common stock being offered. We may also authorize one or more free writing prospectuses to be provided to you that may contain material information relating to these offerings. The prospectus supplement or free writing prospectus may also add, update or change information contained in or incorporated by reference into this prospectus with respect to that offering. If there is any inconsistency between the information in this prospectus and the applicable prospectus supplement or free writing prospectus, you should rely on the prospectus supplement or free writing prospectus, as applicable. This prospectus does not contain all the information provided in the registration statement filed with the SEC. You should carefully read both this prospectus and any applicable prospectus supplement (and any applicable free writing prospectuses), together with the additional information described below under “Where You Can Find More Information” and “Information Incorporated By Reference” before you make an investment decision.

Neither we, nor the selling stockholders, have authorized anyone to provide you with any information or to make any representations other than those contained or incorporated by reference in this prospectus, any applicable prospectus supplement or any free writing prospectuses, prepared by or on behalf of us or to which we have referred you. We and the selling stockholders take no responsibility for, and can provide no assurance as to the reliability of, any other information that others may give you. The selling stockholders will not make an offer to sell these shares of common stock in any jurisdiction where the offer or sale is not permitted.

You should assume that the information appearing in this prospectus and the applicable prospectus supplement to this prospectus is accurate as of the date on its respective cover and that any information incorporated by reference is accurate only as of the date of the document incorporated by reference, unless we indicate otherwise. Our business, financial condition, results of operations and prospects may have changed since those dates. Any statement made in this prospectus or in a document incorporated or deemed to be incorporated by reference in this prospectus will be deemed to be modified or superseded for purposes of this prospectus to the extent that a statement contained in a prospectus supplement or in any other subsequently filed document that is also incorporated or deemed to be incorporated by reference in this prospectus modifies or supersedes that statement. Any statement so modified or superseded will not be deemed, except as so modified or superseded, to constitute a part of this prospectus. See “Information Incorporated By Reference.”

This prospectus and any accompanying prospectus supplements may include trademarks, service marks and trade names owned by us or other companies. All trademarks, service marks and trade names included in this prospectus or any accompanying prospectus supplement are the property of their respective owners.

Unless the context otherwise indicates, references in this prospectus to “we,” “us,” “our,” “Ideal Power” and the “Company” are to Ideal Power Inc. The term “you” refers to a prospective investor.

CAUTIONARY STATEMENT CONCERNING FORWARD-LOOKING STATEMENTS

This prospectus, any applicable prospectus supplement and the documents incorporated by reference herein and therein and the documents incorporated by reference herein contain forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 and the provisions of Section 27A of the Securities Act of 1933, as amended (the “Securities Act”), and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). Forward-looking statements give our current expectations or forecasts of future events. You can identify these statements by the fact that they do not relate strictly to historical or current facts. You can find many (but not all) of these statements by looking for words such as “approximates,” “believes,” “hopes,” “expects,” “anticipates,” “estimates,” “projects,” “intends,” “plans,” “would,” “should,” “could,” “may” or other similar expressions in this prospectus, any applicable prospectus supplement and the documents incorporated by reference herein and therein and the documents incorporated by reference herein. In particular, these include statements relating to future actions, prospective products, applications, customers, technologies, future performance or results of anticipated products, expenses, and financial results. These forward-looking statements are subject to certain risks and uncertainties that could cause actual results to differ materially from our historical experience and our present expectations or projections. Factors that could cause actual results to differ from those discussed in the forward-looking statements include, but are not limited to:

The forward-looking statements are based upon management’s beliefs and assumptions and are made as of the date made. We undertake no obligation to publicly update or revise any forward-looking statements included or incorporated by reference in this prospectus, any applicable prospectus supplement and the documents incorporated by reference herein and therein. You should not place undue reliance on these forward-looking statements.

RISK FACTORS

An investment in our common stock involves risks. You should carefully consider the risk factors incorporated by reference from our most recent Annual Report on Form 10-K and any subsequent Quarterly Reports on Form 10-Q or Current Reports on Form 8-K that we file after the date of this prospectus, and all other information contained, or incorporated by reference, in this prospectus, as updated by our subsequent filings under the Exchange Act, and the risk factors and other information contained, or incorporated by reference, in any applicable prospectus supplement or free writing prospectus that we provide you in connection with an offering of the shares of common stock pursuant to this prospectus, before acquiring any shares of our common stock. Each of these risks could materially and adversely affect our business, financial condition, results of operations and prospects, and could result in a loss of your investment. Additional risks and uncertainties not known to us or that we deem immaterial may also adversely impact our business, financial condition, results of operations and prospects. Please also refer to the section entitled “Cautionary Statement Regarding Forward-Looking Statements” in this prospectus.

USE OF PROCEEDS

We will not receive any of the proceeds from any sale or other disposition of the shares of common stock covered by this prospectus.

We will receive proceeds upon the cash exercise of the Purchase Warrants, the Placement Agent Warrant and the Pre-Funded Warrants for which underlying shares of common stock are being registered hereunder. Assuming full cash exercise of the Purchase Warrants at the exercise price of $2.32 per underlying share of common stock, we will receive proceeds of $4,098,862. Assuming full cash exercise of the Placement Agent Warrant at the exercise price of $2.9716 per underlying share of common stock, we will receive proceeds of $210,003. Assuming full cash exercise of the Pre-Funded Warrants, for which $2,149,657 already has been received by us on the Closing Date, at the remaining exercise price of $0.001 per underlying share of common stock, we will receive additional proceeds of $868.

We currently intend to use the cash proceeds from any Purchase Warrant, Placement Agent Warrant and/or Pre-Funded Warrant exercise for working capital and general corporate purposes. The amount and timing of our actual use of proceeds may vary significantly depending upon numerous factors, including the actual amount of proceeds we receive and the timing of when we receive such proceeds. In addition, the terms of the Purchase Warrants and the Placement Agent Warrant provide that each Purchase Warrant and the Placement Agent Warrant may be exercised on a cashless basis at any time if, at the time of exercise thereof, there is no effective registration statement registering, or the prospectus contained therein is not available for the resale of, the shares underlying such Purchase Warrants or Placement Agent Warrant, as applicable, by the holder thereof. The terms of the Pre-Funded Warrants provide that each Pre-Funded Warrant may be exercised on a cashless basis at any time. We will not receive any cash proceeds as a result of such Purchase Warrants, Placement Agent Warrant and/or Pre-Funded Warrants that are exercised on a cashless basis pursuant to such terms of such Purchase Warrants, Placement Agent Warrant and Pre-Funded Warrant, as applicable.

DESCRIPTION OF CAPITAL STOCK

The following description of our capital stock is intended as a summary only. This description is based upon, and is qualified by reference to, our certificate of incorporation, as amended to date (our “certificate of incorporation”), our certificate of designation of preferences, rights and limitations of Series A convertible preferred stock (our “certificate of designation”), our bylaws, as amended to date (our “bylaws”), and applicable provisions of the General Corporation Law of the State of Delaware (the “DGCL”). This summary is not complete. You should read our certificate of incorporation, our certificate of designation and our bylaws, which are incorporated by reference as exhibits to the registration statement of which this prospectus forms a part, for the provisions that are important to you.

Authorized and Outstanding Capital Stock

Our certificate of incorporation provides that we may issue up to 50,000,000 shares of common stock, par value $0.001 per share, and 10,000,000 shares of preferred stock, par value $0.001 per share. 3,000,000 shares of our authorized preferred stock have been designated as Series A Convertible Preferred Stock, par value $0.001 per share (the “Series A Preferred Stock”). As of December 13, 2019, we had outstanding 2,099,951 shares of common stock and no shares of preferred stock.

Common Stock

Each holder of our common stock is entitled to one vote for each such share outstanding in the holder’s name. No holder of common stock is entitled to cumulate votes in voting for directors.

Holders of our common stock are entitled to such dividends as may be declared by our Board out of funds legally available for such purpose, subject to any preferential dividend rights of any then outstanding preferred stock.

In the event of our liquidation, dissolution or winding up, the holders of our common stock are entitled to receive pro rata our assets, which are legally available for distribution, after payments of all debts and other liabilities and subject to the prior rights of any holders of preferred stock then outstanding.

The shares of common stock are neither redeemable nor convertible. Holders of common stock have no preemptive or subscription rights to purchase any of our securities. The shares of common stock are not subject to further calls or assessment by us. There are no redemption or sinking fund provisions applicable to the common stock. All of the outstanding shares of our common stock are fully paid and non-assessable.

Preferred Stock

General

Our certificate of incorporation provides that our Board has the authority, without any further action by our stockholders, to designate and issue up to 10,000,000 shares of preferred stock in one or more classes or series and to fix the powers, rights, preferences, and privileges of each class or series of preferred stock, including dividend rights, conversion rights, voting rights, terms of redemption, liquidation preferences and the number of shares constituting any class or series, which may be greater than the rights of the holders of the common stock.

The purpose of authorizing our Board to issue preferred stock and determine its rights and preferences is to eliminate delays associated with a shareholder vote on specific issuances. The issuance of preferred stock, while providing flexibility in connection with possible acquisitions, future financings and other corporate purposes, could have the effect of making it more difficult for a third party to acquire, or could discourage a third party from seeking to acquire, a majority of our outstanding voting stock. Additionally, the issuance of preferred stock may adversely affect the holders of our common stock by restricting dividends on our common stock, diluting the voting power of our common stock or subordinating the liquidation rights of our common stock. As a result of these or other factors, the issuance of preferred stock could have an adverse impact on the market price of our common stock.

Series A Preferred Stock

On February 23, 2017, we filed our certificate of designation with the Secretary of State of the State of Delaware creating our Series A Preferred Stock and establishing the designations, preferences, and other rights of the Series A Preferred Stock, which became effective upon filing.

On February 24, 2017, we entered into a purchase agreement with the institutional and other accredited investors identified therein, relating to a private placement of our common stock and warrants to purchase shares of common stock (the “2017 Private Placement”). We also agreed to sell to investors whose purchase of common stock would have resulted in such investor, together with its affiliates and certain related parties, beneficially owning more than 9.99% of our outstanding common stock immediately following the consummation of the offering, an aggregate of 708,430 shares of our Series A Preferred Stock. As a result of the Reverse Stock Split, each share of Series A Preferred Stock was convertible, subject to certain beneficial ownership limitations described below, into shares of common stock on a ten-for-one basis (the “Conversion Shares”). The 708,430 shares of Series A Preferred Stock were converted into 70,843 shares of common stock in February 2019.

In addition, on February 24, 2017, we entered into an exchange agreement (the “Exchange Agreement”) with certain affiliates of AWM Investment Company (the “Exchanging Stockholders”), pursuant to which we effected the exchange of 810,000 shares of common stock held by the Exchanging Stockholders for 810,000 shares of Series A Preferred Stock. Pursuant to the terms of the Series A Preferred Stock and as a result of the Reverse Stock Split, the Exchanging Stockholders had the right to convert the Series A Preferred Stock into shares of common stock on a ten-for-one basis, subject to adjustment in the event of stock splits, recapitalizations and other similar events; provided, however, that the Series A Preferred Stock could not be converted by the Exchanging Stockholders if, after giving effect thereto, the Exchanging Stockholders would beneficially own more than 9.99% of our common stock (the “Conversion Limitation”), The Conversion Limitation could have been increased or decreased by the Exchanging Stockholders, but in no event would it exceed 9.99%, in each case calculated as provided in the certificate of designation establishing the Series A Preferred Stock.

Our Series A Preferred Stock ranks senior to our common stock with respect to dividend rights and rights on liquidation, winding-up and dissolution. Our Series A Preferred Stock has a stated value of $2.535. Holders of Series A Preferred Stock are entitled to receive dividends declared or paid on our common stock. The holders of the Series A Preferred Stock do not have the right to vote on any matter except to the extent required by Delaware law.

The 810,000 shares of Series A Preferred Stock were converted into 81,000 shares of common stock in December 2019.

Anti-Takeover Effects of Certain Provisions of Delaware Law and Our Charter Documents

Effect of Delaware Anti-Takeover Statute. We are subject to Section 203 of the DGCL, an anti-takeover law. In general, Section 203 prohibits a Delaware corporation from engaging in any business combination (as defined below) with any interested stockholder (as defined below) for a period of three years following the date that the stockholder became an interested stockholder, unless:

Section 203 defines “business combination” to include the following:

In general, Section 203 defines an “interested stockholder” as any entity or person beneficially owning 15% or more of the outstanding voting stock of the corporation, or who beneficially owns 15% or more of the outstanding voting stock of the corporation at any time within a three-year period immediately prior to the date of determining whether such person is an interested stockholder, and any entity or person affiliated with or controlling or controlled by any of these entities or persons.

Our Charter Documents. Our charter documents include provisions that may have the effect of discouraging, delaying or preventing a change in control or an unsolicited acquisition proposal that a stockholder might consider favorable, including a proposal that might result in the payment of a premium over the market price for the shares held by our stockholders. Certain of these provisions are summarized in the following paragraphs.

Effects of authorized but unissued common stock and blank check preferred stock. One of the effects of the existence of authorized but unissued common stock and undesignated preferred stock may be to enable our Board to make more difficult or to discourage an attempt to obtain control of our Company by means of a merger, tender offer, proxy contest or otherwise, and thereby to protect the continuity of management. If, in the due exercise of its fiduciary obligations, the Board were to determine that a takeover proposal was not in our best interest, such shares could be issued by the Board without stockholder approval in one or more transactions that might prevent or render more difficult or costly the completion of the takeover transaction by diluting the voting or other rights of the proposed acquirer or insurgent stockholder group, by putting a substantial voting block in institutional or other hands that might undertake to support the position of the incumbent Board, by effecting an acquisition that might complicate or preclude the takeover, or otherwise.

In addition, our certificate of incorporation grants our Board broad power to establish the rights and preferences of authorized and unissued shares of preferred stock. The issuance of additional shares of preferred stock could decrease the amount of earnings and assets available for distribution to holders of shares of common stock. The issuance also may adversely affect the rights and powers, including voting rights, of those holders and may have the effect of delaying, deterring or preventing a change in control of our Company.

Cumulative Voting. Our certificate of incorporation does not provide for cumulative voting in the election of directors, which would allow holders of less than a majority of the stock to elect some directors.

No Stockholder Action by Written Consent. Our certificate of incorporation expressly prohibits stockholders from acting by written consent. This means that stockholders may only act at annual or special meetings.

Vacancies. Our certificate of incorporation provides that all vacancies may be filled by the affirmative vote of a majority of directors then in office, even if less than a quorum.

Special Meeting of Stockholders. A special meeting of stockholders may only be called by the chairman of the Board, the chief executive officer, or the Board at any time and for any purpose or purposes as shall be stated in the notice of the meeting, and shall be called by the secretary upon the written request of the holders of record of at least 25% of the outstanding shares of common stock. This provision could prevent stockholders from calling a special meeting because, unless certain significant stockholders were to join with them, they might not obtain the percentage necessary to request the meeting. Therefore, stockholders holding less than 25% of the issued and outstanding common stock, without the assistance of management, may be unable to propose a vote on any transaction that would delay, defer or prevent a change of control, even if the transaction were in the best interests of our stockholders.

Requirements for Advance Notification of Stockholder Nominations and Proposals. Our certificate of incorporation and bylaws have advance notice procedures with respect to stockholder proposals and nominations of candidates for election as directors, other than nominations made by or at the direction of our Board or a committee of our Board. The business to be conducted at a meeting will be limited to business properly brought before the meeting, in accordance with our certificate of incorporation and bylaws. Failure to follow the procedures set forth in our certificate of incorporation and bylaws will result in the chairman of the meeting disregarding the nomination or declaring that the proposed business will not be transacted.

Limitations on Directors’ Liability

Our certificate of incorporation and bylaws contain provisions indemnifying our directors and officers to the fullest extent permitted by Delaware law.

In addition, as permitted by Delaware law, our certificate of incorporation provides that no director will be liable to us or our stockholders for monetary damages for breach of the director’s fiduciary duty as a director. The effect of this provision is to restrict our rights and the rights of our stockholders in derivative suits to recover monetary damages against a director for breach of the director’s fiduciary duty as a director, except that a director will be personally liable for:

This provision does not affect a director’s liability under the federal securities laws.

2017 Registration Rights Agreement

In connection with the offering described above in “—Preferred Stock—Series A Preferred Stock,” we entered into a registration rights agreement with the investors in such offering, dated February 24, 2017, pursuant to which we filed a Registration Statement on Form S-3, which was declared effective by the SEC on April 21, 2017 (the “2017 Form S-3”), to register for resale the shares of common stock, the shares issuable upon exercise of the warrants to purchase common stock and the Conversion Shares sold or issuable in the 2017 Private Placement. We are obligated to take such actions to keep the 2017 Form S-3 effective and supplement the 2017 Form S-3 from time to time as necessary.

Purchase Warrants, Placement Agent Warrant and Pre-Funded Warrants

On November 7, 2019, in connection with the Offering we issued and sold (i) Pre-Funded Warrants to purchase up to 868,443 shares of common stock issuable upon exercise of Pre-Funded Warrants to certain investors at a price of $2.4763 per share minus a nominal exercise price of $0.001 for each Pre-Funded Warrant Share. The Pre-Funded Warrants were issued to certain investors whose purchase of shares of common stock would make them the beneficial owners of more than 4.99% (or, at the investor’s election, 9.99%) of our outstanding common stock. The Pre-Funded Warrants were immediately exercisable as of the Closing Date and will not expire prior to exercise.

In addition, under the terms of the Purchase Agreement, we issued Purchase Warrants to purchase up to an aggregate of 1,766,751 shares of our common stock with an exercise price of $2.32 per share. The total number of Purchase Warrant Shares represented 125% warrant coverage to the Investor Shares and Pre-Funded Warrant Shares purchased in the Offering. The Purchase Warrants were exercisable immediately as of the Closing Date and expire five years from the date of issuance.

The terms of the Purchase Warrants provide that each Purchase Warrant may be exercised on a cashless basis at any time if, at the time of exercise thereof, there is no effective registration statement registering, or the prospectus contained therein is not available for the resale of, the shares underlying such Purchase Warrants by the holder thereof. The terms of the Pre-Funded Warrants provide that each Pre-Funded Warrant may be exercised on a cashless basis at any time.

As compensation to the placement agent in the Offering, in addition to a cash fee for its services, we issued the Placement Agent Warrant to purchase up to 70,670 shares of common stock, with an exercise price of $2.9716 per share. The other terms of the Placement Agent Warrant are substantially the same as the Purchase Warrants.

The exercise prices of the Pre-Funded Warrants, the Purchase Warrants and the Placement Agent Warrant are subject to adjustment for stock splits, stock dividends, recapitalizations, and similar transactions as provided for in the terms of the Pre-Funded Warrants, the Purchase Warrants and the Placement Agent Warrant. The holders may exercise the Pre-Funded Warrants, the Placement Agent Warrant or the Purchase Warrants in whole or in part.

For more information, please see “Prospectus Summary—Recent Developments—Private Placement.”

Transfer Agent and Registrar

Our transfer agent and registrar for our common stock is Corporate Stock Transfer, Inc.

Listing

Our common stock is listed on The Nasdaq Capital Market under the symbol “IPWR.”

SELLING STOCKHOLDERS

 The shares of common stock being offered by the selling stockholders are those previously issued to the selling stockholders, and those issuable to the selling stockholders upon exercise of the Purchase Warrants, the Placement Agent Warrant and the Pre-Funded Warrants. For additional information regarding the issuances of those securities, please see “Prospectus Summary—Recent Developments—Private Placement.” We are registering the shares of common stock pursuant to the Registration Rights Agreement in order to permit the selling stockholders to offer the shares for resale from time to time. Except for (i) the ownership of the shares of common stock, other warrants, the Purchase Warrants, the Placement Agent Warrant and the Pre-Funded Warrants, (ii) Dr. Lon E. Bell’s service as our Chief Executive Officer and Chairman of the Board, (iii) Craig-Hallum Capital Group LLC, which acted as our placement agent in the Offering, and (iv) and the selling stockholders affiliated with Craig-Hallum Capital Group LLC, which acted as our placement agent in the Offering, the selling stockholders have not had any material relationship with us within the past three years. Furthermore, except as set forth below, none of the selling stockholders is a broker-dealer registered under Section 15 of the Exchange Act or an affiliate of a broker-dealer registered under Section 15 of the Exchange Act.

The table below lists the selling stockholders and other information regarding the beneficial ownership of the shares of common stock by each of the selling stockholders. The second column lists the number of shares of common stock beneficially owned by each selling stockholder, based on its ownership of the shares of common stock, the Purchase Warrants, the Placement Agent Warrant and the Pre-Funded Warrants, as of the date of this prospectus, assuming exercise of the Purchase Warrants, the Placement Agent Warrant and the Pre-Funded Warrants held by the selling stockholders on that date, without regard to any limitations on exercises.

The third column lists the shares of common stock being offered by this prospectus by the selling stockholders, assuming exercise of the Purchase Warrants, the Placement Agent Warrant and the Pre-Funded Warrants held by the selling stockholders as of the date of this prospectus, without regard to any limitations on exercises.

In accordance with the terms of the Registration Rights Agreement, this prospectus generally covers the resale of the sum of (i) the number of shares of common stock issued to the selling stockholders in the Offering and (ii) the maximum number of shares of common stock issuable upon exercise of the Purchase Warrants, the Placement Agent Warrant and the Pre-Funded Warrants, determined as if the outstanding Purchase Warrants, the Placement Agent Warrant and Pre-Funded Warrants were exercised in full as of the trading day immediately preceding the date the registration statement of which this prospectus forms as part was initially filed with the SEC, each as of the trading day immediately preceding the applicable date of determination and all subject to adjustment as provided in the Registration Rights Agreement, without regard to any limitations on exercises. The fourth column assumes the sale of all of the shares offered by the selling stockholders pursuant to this prospectus, assuming exercise of the Purchase Warrants, the Placement Agent Warrant and the Pre-Funded Warrants held by the selling stockholders as of the date of this prospectus, without regard to any limitations on exercises, and that the selling stockholders do not acquire any additional shares. Information in the table below, with respect to beneficial ownership, has been furnished by the selling stockholders.

Under the terms of the Purchase Warrants, the Placement Agent Warrant and the Pre-Funded Warrants, a selling stockholder may not exercise the Purchase Warrants, the Placement Agent Warrant or the Pre-Funded Warrants to the extent such exercise would cause such selling stockholder, together with its affiliates and attribution parties, to beneficially own a number of shares of common stock which would exceed 4.99% or 9.99% of our then outstanding common stock following such exercise, excluding for purposes of such determination shares of common stock issuable upon exercise of the Purchase Warrants, the Placement Agent Warrant and the Pre-Funded Warrants which have not been exercised. The number of shares in the second column does not reflect this limitation.

Information concerning the selling stockholders may change from time to time and any changed information will be set forth in supplements to this prospectus, if and when necessary. The selling stockholders may sell all, some or none of their shares in this offering. We cannot advise you as to whether the selling stockholders will in fact sell any or all of such shares. In addition, the selling stockholders listed in the table below may have sold, transferred or otherwise disposed of, or may sell, transfer or otherwise dispose of, at any time and from time to time, shares in transactions exempt from the registration requirements of the Securities Act, after the date on which they provided the information set forth in the table below. See “Plan of Distribution.”

To our knowledge, each person named in the table has sole voting and investment power with respect to all of the securities shown as beneficially owned by such person, except as otherwise set forth in the notes to the table. The number of securities shown represents the number of securities the person “beneficially owns,” as determined by the rules of the SEC. The SEC has defined “beneficial” ownership of a security to mean the possession, directly or indirectly, of voting power and/or investment power. A security holder is also deemed to be, as of any date, the beneficial owner of all securities that such security holder has the right to acquire within 60 days after that date through (1) the exercise of any option, warrant or right, (2) the conversion of a security, (3) the power to revoke a trust, discretionary account or similar arrangement, or (4) the automatic termination of a trust, discretionary account or similar arrangement.

The percentages in the table below reflect beneficial ownership immediately prior to the date of this prospectus and immediately after the resale of all shares subject to resale pursuant to this prospectus as determined in accordance with Rule 13d-3 under the Exchange Act and are based on 2,099,951 shares of our common stock outstanding as of the date of this prospectus.

PLAN OF DISTRIBUTION

Each selling stockholder of the securities and any of their pledgees, assignees and successors-in-interest may, from time to time, sell any or all of their securities covered hereby on the principal Trading Market (as defined in the Purchase Agreement, which is filed as an exhibit to the registration statement of which this prospectus forms as part) or any other stock exchange, market or trading facility on which the securities are traded or in private transactions. These sales may be at fixed or negotiated prices. A selling stockholder may use any one or more of the following methods when selling securities:

The selling stockholders may also sell securities under Rule 144 or any other exemption from registration under the Securities Act, if available, rather than under this prospectus.

Broker-dealers engaged by the selling stockholders may arrange for other brokers-dealers to participate in sales. Broker-dealers may receive commissions or discounts from the selling stockholders (or, if any broker-dealer acts as agent for the purchaser of securities, from the purchaser) in amounts to be negotiated, but, except as set forth in a supplement to this prospectus, in the case of an agency transaction not in excess of a customary brokerage commission in compliance with the Financial Industry Regulatory Authority, Inc. (“FINRA”) Rule 2440; and in the case of a principal transaction a markup or markdown in compliance with FINRA IM-2440.

In connection with the sale of the securities or interests therein, the selling stockholders may enter into hedging transactions with broker-dealers or other financial institutions, which may in turn engage in short sales of the securities in the course of hedging the positions they assume. The selling stockholders may also sell securities short and deliver these securities to close out their short positions, or loan or pledge the securities to broker-dealers that in turn may sell these securities. The selling stockholders may also enter into option or other transactions with broker-dealers or other financial institutions or create one or more derivative securities which require the delivery to such broker-dealer or other financial institution of securities offered by this prospectus, which securities such broker-dealer or other financial institution may resell pursuant to this prospectus (as supplemented or amended to reflect such transaction).

The selling stockholders and any broker-dealers or agents that are involved in selling the securities may be deemed to be “underwriters” within the meaning of the Securities Act in connection with such sales. In such event, any commissions received by such broker-dealers or agents and any profit on the resale of the securities purchased by them may be deemed to be underwriting commissions or discounts under the Securities Act. Each selling stockholder has informed us that it does not have any written or oral agreement or understanding, directly or indirectly, with any person to distribute the securities.

We are required to pay certain fees and expenses incurred by us incident to the registration of the securities, other than underwriting discounts, selling commissions and brokerage fees. Pursuant to the Registration Rights Agreement, we have agreed to indemnify the selling stockholders against certain losses, claims, damages and liabilities, including liabilities under the Securities Act.

We agreed to keep the registration statement of which this prospectus forms a part effective until the earlier of (i) the date on which the securities may be resold by the selling stockholders without registration and without regard to any volume or manner-of-sale limitations by reason of Rule 144, without the requirement for us to be in compliance with the current public information under Rule 144 under the Securities Act or any other rule of similar effect or (ii) all of the securities have been sold pursuant to this prospectus or Rule 144 under the Securities Act or any other rule of similar effect. The resale securities will be sold only through registered or licensed brokers or dealers if required under applicable state securities laws. In addition, in certain states, the resale securities covered hereby may not be sold unless they have been registered or qualified for sale in the applicable state or an exemption from the registration or qualification requirement is available and is complied with.

Under applicable rules and regulations under the Exchange Act, any person engaged in the distribution of the resale securities may not simultaneously engage in market making activities with respect to the common stock for the applicable restricted period, as defined in Regulation M, prior to the commencement of the distribution. In addition, the selling stockholders will be subject to applicable provisions of the Exchange Act and the rules and regulations thereunder, including Regulation M, which may limit the timing of purchases and sales of the common stock by the selling stockholders or any other person. We will make copies of this prospectus available to the selling stockholders and have informed them of the need to deliver a copy of this prospectus to each purchaser at or prior to the time of the sale (including by compliance with Rule 172 under the Securities Act).

LEGAL MATTERS

 The validity of the shares of our common stock offered by this prospectus will be passed upon for us by Perkins Coie LLP. Additional legal matters may be passed upon for us, the selling stockholders or any underwriters, dealers or agents, by counsel that we will name in the applicable prospectus supplement.

EXPERTS

The audited financial statements as of December 31, 2018 and 2017 and for each of the two years in the period ended December 31, 2018 incorporated by reference in this prospectus and elsewhere in the registration statement have been so incorporated by reference in reliance upon the report of Gumbiner Savett Inc., an independent registered public accounting firm, upon the authority of said firm as experts in accounting and auditing in giving said report.

WHERE YOU CAN FIND MORE INFORMATION

We file with, or furnish to, the SEC reports including our Annual Report on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K, and amendments to those reports pursuant to Section 13(a) or 15(d) of the Exchange Act. These reports are available free of charge on our corporate website, www.idealpower.com, as soon as reasonably practicable after they are electronically filed with or furnished to the SEC. Copies of any materials we file with the SEC can be obtained at www.sec.gov. The foregoing website addresses are provided as inactive textual references only. The information provided on our website (or any other website referred to in this prospectus or any applicable prospectus supplement) is not part of this prospectus or any applicable prospectus supplement and is not incorporated by reference as part of this prospectus or any applicable prospectus supplement.

INFORMATION INCORPORATED BY REFERENCE

The SEC allows us to “incorporate by reference” the information we file with them, which means that we can disclose important information to you by referring you to those documents. The information incorporated by reference is considered to be part of this prospectus and any accompanying prospectus supplement, and later information filed with the SEC will automatically update and supersede this information. We incorporate by reference the documents listed below and all documents subsequently filed with the SEC pursuant to Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act, prior to the termination of the offering under this prospectus and any prospectus supplement (other than information deemed furnished and not filed in accordance with SEC rules, including Items 2.02 and 7.01 of Form 8-K):

You may request a copy of these filings (other than an exhibit to a filing unless that exhibit is specifically incorporated by reference into that filing) at no cost, by writing to or telephoning us at the following address:

Ideal Power Inc.

4120 Freidrich Lane, Suite 100

Austin, Texas, 78744

(512) 264-1542

Attention: Chief Financial Officer