The Powerwall is an AC Battery, meaning it has an integrated AC-DC inverter/charger. This has both advantages and disadvantages; however, one main advantage is the ability to be easily retrofitted to homes with an existing solar installation. Since it has an inbuilt inverter, it can even be installed without solar and used solely for backup power purposes.
The Inverter power rating is moderately high with a continuous output of 5kW and a peak output of 7kW. The power output is generally well suited to meet the requirements of an average home, which often has several high powered appliances running simultaneously. The 7kW peak power rating is reasonable, but it can only maintain the peak output for 10 seconds; this means it’s only suited for brief power (startup) surges and not well suited for off-grid installations. However, for greater power requirements, multiple Powerwalls can be installed in parallel, enabling much higher power output.