This 647Wh battery pack (25.9V, 25Ah) provides strong protection with independent inverter, control board, and Bms. Certified by Etl, Fcc, Doe, IEC62133, UN38.3, and Msds. It includes versatile outputs, a 3W Led light, IP67 waterproofing, and Mppt for multiple charging methods. Perfect for outdoor use.