Twin Vee PowerCats Co美股招股说明书(2026-03-09版)

This preliminary prospectus supplement relates to an effective registration statement under the Securities Act of 1933, asamended, but the information in this preliminary prospectus supplement is not complete and may be changed. Thispreliminary prospectus supplement and the accompanying prospectus are not an offer to sell these securities, and we are notsoliciting offers to buy these securities in any state or other jurisdiction where the offer or sale is not permitted. PRELIMINARY PROSPECTUS SUPPLEMENTSUBJECT TO COMPLETION DATED MARCH 9, 2026 (To the Prospectus dated February 27, 2026) Shares of Common Stock Twin Vee PowerCats Co. We are offering on a best efforts basisshares of our common stock in this offeringpursuant to this prospectus supplement and theaccompanying prospectus at a price of $per share. Our common stock is listed on the Nasdaq Capital Market under the symbol “VEEE.” On, 2026, the last reported sale price ofour common stock on the Nasdaq Capital Market was $per share. We are an “emerging growth company” as that term is used in the Jumpstart Our Business Startups Act of 2012 and a “smallerreporting company.” As such, we have elected to comply with certain reduced public company reporting requirements. Please see“Prospectus Supplement Summary—Implications of Being an Emerging Growth Company.” Investing in our common stock involves a high degree of risk. Before making an investment decision, please read theinformation under the heading “Risk Factors” beginning on pageS-9of this prospectus supplement and in the documentsincorporated by reference into this prospectus supplement and the accompanying base prospectus. Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of thesesecurities or passed upon the adequacy or accuracy of this prospectus supplement or the accompanying base prospectus. Anyrepresentation to the contrary is a criminal offense. As of the date of this prospectus supplement, the aggregate market value of our common stock held by non-affiliates pursuant toGeneral Instruction I.B.6 of Form S-3 is $16,247,177, which is calculated based on 8,247,298 shares of our common stock outstandingheld by non-affiliates and a price of $1.97 per share, the closing price of our common stock on January 8, 2026, which is the highestclosing sale price of our common stock on the Nasdaq Capital Market within the prior 60 days of this prospectus supplement. Duringthe prior 12 calendar month period that ends on and includes the date hereof, we have not offered or sold any shares of our commonstock pursuant to General Instruction I.B.6 to FormS-3. (1)In addition to the placement agent fees, we have agreed to reimburse the placement agent for certain expenses in connection withthis offering. See “Plan of Underwriting” for a description of the compensation payable to the placement agent.(2)Because there is no minimum number of securities or amount of proceeds required as a condition to closing in this offering, actual public offering amount, placement agent fees, and proceeds to us, if any, are not presently determinable and may besubstantially less than the total maximum offering amounts set forth above. For more information, see“Plan of Distribution.” ThinkEquity The date of this prospectus supplement is , 2026 TABLE OF CONTENTS Page About this Prospectus SupplementS-iSpecial Note Regarding Forward-Looking StatementsS-iiiProspectus Supplement SummaryS-1Summary of the OfferingS-8Risk FactorsS-9Use of ProceedsS-11CapitalizationS-11Dividend PolicyS-13DilutionS-14Plan of DistributionS-15Legal MattersS-22ExpertsS-22Incorporation of Certain Information by ReferenceS-23Where You Can Find More InformationS-24 TABLE OF CONTENTS PROSPECTUS Page About this ProspectusiiProspectus Summary1Risk Factors11Special Note Regarding Forward-Looking Statements12Use of Proceeds13Description of Capital Stock14Description of Debt Securities18Description of Warrants23Legal Ownership of Securities26Plan of Distribution29Legal Matters31Experts31Where You Can Find More Information31Incorporation of Certain Information by Reference31 ABOUT THIS PROSPECTUS SUPPLEMENT This prospectus supplement is part of a registration statement that we have filed with the Securities and Exchange Commission (the“SEC”) utilizing a “shelf” registration process. Under the shelf registration process, we may offer shares of our common stock havingan aggregate offering price of up to $100,000,000 under the accompanying base prospectus. This prospectus supplement may add to,update or change information in the accompanying prospectus and the documents incorporated by reference into this prospectussupplement or the accompanying prospectus. We provide information to you about this offering of shares of our common stock in two separate documents that are bound together:(1)this prospectus supplement, which describes the specific details regarding this offering; and (2)the accom