The Tesla Powerwall is in basic terms a large lithium-ion battery pack. Its primary objective is a backup power supply in the event of a power shortage. In technical terms, the Powerwall is optimized for daily cycling, such as for load shifting. Powerwall recharges either by solar power or by the grid during off-peak hours to reduce costs. You can buy as many Powerwall’s as you require, each retail for £8,700 in the UK.
It’s debatable if you do actually require a Powerwall, they are ideal in remote locations and where electricity costs are high. Nevertheless, the cost of 1 Powerwall is high. YouTuber, Undecided with Matt Ferrell goes through the agony and debatable ecstasy of installing and running a Tesla Powerwall.