A 48 volt 100Ah Iron Edison 4LiFe Lithium Iron battery with 5.1 kWh of capacity, a 1.3 KW ground mounted solar array, and Outback’s FlexPower One Prewired System. This is the perfect system for a small off-grid residence or other project. The Iron Edison 4LiFe Lithium Iron battery is a compact and maintenance free solution. The 48v 100Ah size has 5.1 kWh of total capacity (see specs for more details). Lithium Iron batteries are a sealed, maintenance free battery solution, but they do require an indoor conditioned space.