Tandem PV, a California-based developer of perovskite-silicon tandem solar panels, has received a $4 million grant from the California Energy Commission to conduct third-party testing of its modules under field conditions. Tandem PV claims that its panels have achieved 28% efficiency, approximately 30% higher than what the best standard silicon modules deliver. Independent laboratories and technical organizations will be engaged to evaluate energy yield over long-term exposure time, durability with respect to the environment, and stability over operating times. Tandem PV has stated that the testing is intended to complement existing internal data and support commercial readiness. In late 2024, Tandem PV was awarded $5.2 million by the US Department of Energy under its thin-film solar initiative to support similar development goals. Tandem PV has emphasized that both grants are essential for scaling domestic manufacturing and validating product performance. Earlier this year, Tandem PV secured $50 million in a funding round led by Eclipse to build a US-based facility dedicated to producing high-efficiency perovskite solar panels.