Electricity is easy to take for granted – until it's not. The invisible power that lights your home, charges your devices and keeps appliances humming isn't something you think about every day.

The clean energy system stores energy from the sun or grid to power your home. And its growing ... spending just 8p/kWh for off-peak energy - you can charge a Tesla Model Y overnight for a few ...

The Powerpacks will charge by drawing energy from the grid during off-peak hours ... not the Powerwall." Tesla also recently unveiled the new version of its at-home battery, Powerwall 2.0 ...