The Tesla Powerwall 2 is the next generation of battery product from Tesla with a built-in inverter that would allow it to be retrofitted in any existing PV systems. This product has double the energy capacity of the original Powerwall and the inverter can now support both grid-connected and off-grid/backup applications. The entire solution would provide a higher degree of energy independence and extend the usage opportunity of the energy produced by the PV system. Some advantages of the Tesla Powerwall 2 include: