Equity method investment	6 Months Ended
Jun. 30, 2025
Equity Method Investments and Joint Ventures [Abstract]
Equity method investment	9. Equity method investment We have a 45% interest in Alpha Steel LLC ("Alpha Steel"), which is accounted for under the equity method of accounting. Alpha Steel, located in Sealy, Texas, is dedicated to producing steel components, including torque tubes, for utility-scale solar projects. Taihua New Energy (Thailand) Co., LTD ("Taihua") has a 51% interest in Alpha Steel and DAYV LLC, an entity owned by members of the Board of Managers of Alpha Steel and a related party with the parent company of Taihua, has a 4% interest in Alpha Steel. The Chief Executive Officer of Taihua is the General Manager of Alpha Steel. We have equal voting representation with Taihua and DAYV LLC, combined, on Alpha Steel's Board of Managers which is responsible, through majority vote, for making certain "major decisions" involving Alpha Steel, as specified in the limited liability company agreement ("LLC Agreement"), including, among other things, approval of an annual business plan. Pursuant to the LLC Agreement, we could be required to make up to $0.8 million in future additional capital contributions as Alpha Steel continues to expand production. For the six months ended June 30, 2025 and 2024, we recognized losses of $0.6 million and $0.5 million, respectively, which represent our share of the net operating losses incurred by Alpha Steel during each period. Losses recognized for the three months ended June 30, 2025 and 2024, were $0.5 million and $0.2 million, respectively. In connection with the creation of Alpha Steel, we also entered into an equipment supply agreement with Alpha Steel, as amended, (the "Supply Agreement"), effective through June 30, 2027, the terms of which apply to our equipment purchase orders. Pursuant to the Supply Agreement, we committed to placing a minimum level of purchase orders for torque tubes with Alpha Steel during the period from July 1, 2025 to June 30, 2026 and for the subsequent annual period. In the event we fail to meet our minimum required purchase commitments in any period, we may be required to make a cash payment for the net profit attributable to any unfilled requirements, calculated as specified in the agreement, in an amount not to exceed $4.0 million in the aggregate in each measurement period. The Supply Agreement may be terminated early in accordance with its provisions or may be extended beyond the initial term if mutually agreed to by the parties.

Equity method investment

6 Months Ended

Jun. 30, 2025

Equity Method Investments and Joint Ventures [Abstract]

9. Equity method investment

We have a 45% interest in Alpha Steel LLC ("Alpha Steel"), which is accounted for under the equity method of accounting. Alpha Steel, located in Sealy, Texas, is dedicated to producing steel components, including torque tubes, for utility-scale solar projects. Taihua New Energy (Thailand) Co., LTD ("Taihua") has a 51% interest in Alpha Steel and DAYV LLC, an entity owned by members of the Board of Managers of Alpha Steel and a related party with the parent company of Taihua, has a 4% interest in Alpha Steel. The Chief Executive

Officer of Taihua is the General Manager of Alpha Steel. We have equal voting representation with Taihua and DAYV LLC, combined, on Alpha Steel's Board of Managers which is responsible, through majority vote, for making certain "major decisions" involving Alpha Steel, as specified in the limited liability company agreement ("LLC Agreement"), including, among other things, approval of an annual business plan. Pursuant to the LLC Agreement, we could be required to make up to $0.8 million in future additional capital contributions as Alpha Steel continues to expand production. For the six months ended June 30, 2025 and 2024, we recognized losses of $0.6 million and $0.5 million, respectively, which represent our share of the net operating losses incurred by Alpha Steel during each period. Losses recognized for the three months ended June 30, 2025 and 2024, were $0.5 million and $0.2 million, respectively.

In connection with the creation of Alpha Steel, we also entered into an equipment supply agreement with Alpha Steel, as amended, (the "Supply Agreement"), effective through June 30, 2027, the terms of which apply to our equipment purchase orders. Pursuant to the Supply Agreement, we committed to placing a minimum level of purchase orders for torque tubes with Alpha Steel during the period from July 1, 2025 to June 30, 2026 and for the subsequent annual period. In the event we fail to meet our minimum required purchase commitments in any period, we may be required to make a cash payment for the net profit attributable to any unfilled requirements, calculated as specified in the agreement, in an amount not to exceed $4.0 million in the aggregate in each measurement period. The Supply Agreement may be terminated early in accordance with its provisions or may be extended beyond the initial term if mutually agreed to by the parties.