The Bluetti EP500 is an off-grid solar/battery backup power system that provides reliable power backup to your home, office or farm. It is a clean, efficient, renewable solution that operates independently of the power utility grid and is safe for indoor use. The EP500 uses the latest Lithium Iron Phosphate battery technology, which offers improved performance over conventional lead acid batteries. Its powerful lithium battery pack provides up to 500 amp-hours (Ah) of energy storage capacity, enough to power most homes for up to eight hours during an outage.