Revolving Credit Facility

On March 31, 2026, the Company entered into a revolving credit facility (the “Credit Facility”) with Wells Fargo Bank, National Association, as lender, pursuant to which the Company may borrow up to $10.0 million, subject to a borrowing base. Tigo Energy MergeCo, Inc., a wholly owned subsidiary of the Company, is the guarantor of the Company’s obligations under the Credit Facility. The Credit Facility matures on March 31, 2029. As of March 31, 2026, there was no amount outstanding under the Credit Facility.

Borrowings under the Credit Facility bear interest at a rate equal to the secured overnight financing rate, as administered by the Federal Reserve Bank of New York, plus an applicable margin of 1.75% to 2.00%, based on monthly average excess availability. Available borrowings under the Credit Facility may not exceed the borrowing base, which is determined based on specified percentages of eligible accounts receivable and eligible inventory, in each case subject to customary reserves, eligibility criteria and other adjustments. The occurrence of an event of default under the Credit Facility could result in the termination of the commitments under the Credit Facility and the acceleration of all outstanding borrowings under the Credit Facility. The terms of the Credit Facility require the Company to maintain a minimum level of liquidity at all times, which is tested on a monthly basis. As of March 31, 2026, the Company was in compliance with all applicable covenants under the Credit Facility.

Convertible Promissory Notes and Debt Extinguishment

On January 9, 2023, the Company entered into a convertible promissory note purchase agreement (“Note Purchase Agreement”) with L1 Energy Capital Management S.a.r.l in exchange for cash of $50.0 million (“Convertible Promissory Notes”). Outstanding borrowings under the Convertible Promissory Notes bear interest at a rate of 5.0% per year. The principal amount was due at the maturity date of January 9, 2026, and interest is payable semiannually beginning in July 2023.

On December 17, 2025, the Company extinguished the Convertible Promissory Notes by paying $51.3 million in cash which included principal, accrued interest and fees associated with the extinguishment. The reacquisition price of the debt was higher than the related carrying value at the extinguishment date, therefore resulting in a loss on extinguishment of Convertible Promissory Notes of $1.1 million. The loss on extinguishment of the Convertible Promissory Note is included in other (income) expense, net in the consolidated statements of operations and comprehensive loss.

The Company had no outstanding debt as of March 31, 2026 and December 31, 2025.