One Powerwall can store solar power for use at night, as well as backup essential loads such as a refrigerator, lighting, and power outlets for days. 

Two Powerwalls provide whole home backup including larger appliances. With solar power and efficient energy use, homes can become energy independent for most of the year.

Combined with larger solar power systems, three Powerwalls can store further minimize dependence on the grid and provide whole-house backup capability even for larger homes.

Large homes and commercial operations can be fully supported, for full off-grid autonomy with up to ten Powerwalls paired with solar power.