The best part of this solar battery is the versatility. Powerwall can be used as a backup generator, storage solution, or for every day use. If there is an unexpected power outage, the Powerwall has stored up energy to give you peace of mind and keep your home running. As part of a modular system, you can put multiple batteries together to create powerful solar energy storage. You can max out at 10 Powerwalls put together, which adds up to roughly 140 Kw h. This also means that your environmental and solar cost benefits are extended. The Powerwall ensures that your solar power will never be wasted.