Tesla Inc. will push back the reveal of its semi truck by three weeks as the electric-car maker focuses on boosting production of its cheaper sedan model and increasing battery production for storm-ravaged regions.

“Diverting resources to fix Model 3 bottlenecks & increase battery production for Puerto Rico & other affected areas,” Tesla Chief Executive Officer Elon Musk wrote in a tweet Friday. The company will unveil the semi truck on Nov. 16, instead of Oct. 26.

Tesla built only 260 Model 3 sedans during the third quarter, less than a fifth of its 1,500-unit forecast. Musk wrote on Twitter earlier Friday he’d be “happy to talk” with Puerto Rico’s governor about supplying batteries to the island territory rebuilding after Hurricane Maria.