A presidential Our operations team did an outstanding job in enabling microinverter shipments from our contract groundbreaking manufacturing facilities in the United States The microinverter supply landscape remained stable throughout 2023. As for Enphase IQ® Batteries, we have two cell pack suppliers, both in China, which have ample manufacturing capacity to support our ramp in 2024. In addition, we will have the capability to manufacture IQ Batteries in the United States in the second half of 2024 at the Salcomp, Texas facility. “The IRA legislation enabled Enphase On August 12, 2022, President Biden signed the IRA into law, marking the most to begin manufacturing in the signicant action the U.S. Congress has taken on clean energy and climate United States, bring back high- change in the nation’s history. The IRA legislation enabled Enphase to begin technology jobs, and advance the manufacturing in the United States, bring back high-technology jobs, and country’s clean energy economy.” advance the country’s clean energy economy. Starting in the second quarter of 2023, we began shipments from our contract manufacturing partners in the United States. We are pleased that U.S. President Biden was able to visit the Flex South Carolina facility on July 6, 2023 and inaugurate the function. Our other contract manufacturer in the United States, Salcomp, commenced microinverter shipments from its Texas facility in August 2023. In line with our eorts to streamline manufacturing, we ceased operations at our contract manufacturing site in Romania. We now have ve contract manufacturing locations for microinverters – Flex China, Flex Mexico, Flex South Carolina, Salcomp India, and Salcomp Texas. Collectively, once fully ramped these facilities will have a global capacity of approximately 7.25 million microinverter units per quarter, of which 5 million units will be in the United States. President Joe Biden, Congressman James Clyburn of South Carolina, and Enphase’s Co-founder Raghu Belur, President Joe Biden at the Flex manufacturing facility event in Columbia, South Carolina at the Flex manufacturing facility event in Columbia, South Carolina 10 ENPHASE CEO LETTER TO SHAREHOLDERS 2023 11