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Acquisitions | 12 Months Ended
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Dec. 31, 2025
Business Combination [Abstract] |
Acquisitions | Note 3. Acquisition Acquisition of Shenzhen UZ Energy Co. Ltd. “(UZ Energy”) On July 25, 2025, our wholly owned subsidiary, SES AI International I Pte Ltd, entered into a Share Transfer and Share Purchase Agreement (the “Agreement”) with UZ Energy and its shareholders to acquire 100% of the share capital of UZ Energy, a China-based battery energy storage system manufacturer. The acquisition closed on September 15, 2025 (the “Closing”). The acquisition of UZ Energy was accounted for as a business combination and the results of UZ Energy’s operations from the date of closing have been included in our consolidated financial statements. The aggregate consideration for the acquisition of UZ Energy is approximately RMB 183.5 million ($25.8 million), consisting of the purchase consideration of approximately RMB 93.5 million ($13.1 million) and a capital contribution of RMB 90.0 million ($12.6 million) made by the Company in exchange for newly issued shares of UZ Energy. Purchase consideration consists of cash payments of approximately RMB 23.5 million ($3.3 million), which was paid during the fourth quarter of 2025, and deferred consideration of approximately RMB 70.0 million ($9.8 million) tied to performance targets, assuming such targets are met but not exceeded. At the Closing, total purchase consideration was valued at RMB 83.3 million ($11.7 million), reflecting the acquisition date fair value of the deferred cash payments. The capital contribution was excluded from purchase consideration as the proceeds will remain with UZ Energy and will be used for working capital requirements. The deferred consideration is contingent on UZ Energy meeting specified thresholds relating to revenue and cash balances for fiscal years 2025 and 2026. As of the Closing, the fair value of the deferred consideration was estimated using a Black-Scholes option-pricing model. As of December 31, 2025, the possible outcomes for the range of deferred cash payments, on an undiscounted basis, are from $1.1 million to $11.8 million. The analysis considered, among other items, contractual terms of the Agreement, the Company’s discount rate, the timing of expected future cash flows and the probability that the revenue and cash balance thresholds required for payment of the deferred consideration will be achieved. The Company recorded the acquisition date fair value of the short-term portion of the deferred payment liability within accrued expenses and other current liabilities and the long-term portion of the deferred payment liability within other liabilities, non-current on the consolidated balance sheets, respectively. The purchase price was allocated to the assets acquired and liabilities assumed based on the estimated fair values at the date of acquisition. The excess of the purchase price over the fair value of the net assets acquired was allocated to goodwill. Goodwill is primarily attributed to the expected synergies from future expected economic benefits, including enhanced revenue growth from expanded products and capabilities related to ESS, as well as substantial cost savings from duplicative overheads, streamlined operations and enhanced efficiency. Goodwill is not deductible for tax purposes. The following table summarizes the preliminary allocation of the purchase price (in thousands):
Cash and cash equivalents | $ | 795 |
Accounts receivable |  | 1,139 |
Inventory |  | 3,807 |
Prepaid expenses and other current assets |  | 3,465 |
Property, plant and equipment |  | 1,023 |
Intangible assets, net |  | 1,753 |
Goodwill | ​ | 13,272 | ​
Other assets |  | 195 | ​
Accounts payable |  | (2,644) | ​
Accrued expenses and other liabilities | ​ | (1,828) | ​
Deferred revenue | ​ | (6,862) | ​
Operating lease liability | ​ | (174) | ​
Note payable, current | ​ | (1,966) | ​
Total | $ | 11,975 |
The above fair values of assets acquired and liabilities assumed are based on the information that was available as of the reporting date. During the fourth quarter, the Company recorded measurement period adjustments to the preliminary purchase price allocation for the acquisition of UZ Energy. These adjustments, which reflect new information obtained about facts and circumstances that existed as of the acquisition date, resulted in an increase in warranty reserve liability and a corresponding increase in goodwill. The fair values include Level 3 unobservable inputs and were determined using generally accepted valuation techniques. The Company’s allocation of the purchase price to certain assets acquired and liabilities assumed is provisional and the Company will continue to adjust those estimates as additional information pertaining to events or circumstances present as of the closing becomes available and final valuation and analysis are completed. The Company will finalize the purchase price allocation no later than one year from the acquisition date. The following table presents a reconciliation of the deferred consideration liability:
​ | ​ | ​ | ​
​ | ​ | (in thousands)
Balance as of December 31, 2024 | ​ | $ | —
Additions during the year | ​ | ​ | 11,698
Payments during the year | ​ | ​ | (3,357)
Change in fair value | ​ |  | 205
Foreign exchange impact | ​ | ​ | 224
Balance as of December 31, 2025 | ​ | $ | 8,770
The deferred consideration liability, which was measured at fair value on Acquisition Date and was remeasured to fair value for actual 2025 results and expected 2026 results. The change in fair value was recorded within miscellaneous expense, net of the Company’s Consolidated Statements of Operations. The following table sets forth the components of the identifiable intangible assets acquired and their estimated fair values and useful lives as of the date of the acquisition:
(in thousands) | Fair Value | ​ ​ ​ | Weighted Average Useful Lives
Patents | $ | 1,685 | ​ | ​ | 15 years
Trademarks |  | 68 | ​ |  | 15 years
Total acquired intangible assets | $ | 1,753 | ​ | ​ | ​
The amount of revenue and pre-tax loss the Company recognized since the acquisition, which is included in the consolidated statements of operations and comprehensive loss for the years ending December 31, 2025, was approximately $7.4 million and $0.4 million, respectively. The Company has not included pro-forma financial information for the acquisition of UZ Energy in these consolidated financial statements. It was determined that the preparation of such information is impracticable as UZ Energy was a foreign, privately held entity that did not historically maintain financial statements in accordance with the U.S. GAAP. The Company has, however, included the results of UZ Energy's operations in its consolidated financial statements from the Closing date forward.

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