We’re setting a new standard in power station innovationBluetti are made from extremely durable and user-resistant materials such as cast aluminum. Bluetti can take a beating. We build every bluetti with quality lithium cells, known for stability, monitored by a state-of-the-art battery management system that prevents over-charge, over-current, and short circuiting. The battery pack is enclosed in a water-tight enclosure that seals it from the elements. Included is a pre-installed solar charging optimization module that functions as a maximum power point tracker (MPPT), resulting in up to 40% faster charge times, especially from solar panels.