Feature: Modular design: Max parallel connection of 8 panels (1000W) Adjustable angle (30-60Adeg) for optimal solar energy collection Up to 25% conversion efficiency STC 125WBNPI 138W TOPCon solar cells perform well in low light and high temperatures Built to last with an IP68 waterproof rating Versatile use for home, backyard, and RV setups Lightweight: 4 panels weigh only 35.2 lb (16.2kg) Up to 5-year warranty and 30-year lifespan