GRECELL 1000W Power Station 999Wh Battery Solar Generator for Outdoor Camping. Upgraded Battery Management System, Not only will the power station automatically stop charging any device when it's full, it will also offer short-circuit and power-surge protection for electronics that constantly need electricity.The same battery management system comes into play when charging the generator with solar power, ensuring none of the circuits get fried. What's more, it's designed to keep itself from overheating with its silent built-in dual cooling fans.