what is the best battery for solar storage in 2022?

Find The Best Solar Batteries For Your Home


As Tesla Motors (now Tesla, Inc.) developed batteries for its electric car business, the company also started experimenting with using batteries for energy storage. Starting in 2012, Tesla installed prototype battery packs (later developed into the Tesla Powerpack) at the locations of a few industrial customers

Tesla has offered several models of the Powerwall since its introduction in April 2015. Tesla mainly produce 3types battery,including original Powerwall Powerwall 2, Powerwall+.

1.Powerwall 1

On June, 2015, CEO Elon Musk annnounced that original Powerwall would be more than doubled to 5 kW steady with 7 kW peak, with no increase in price. There are Two models of Powerwall, one is a 7 kilowatt-hour (kWh) capacity model for daily cycle use (solar self-consumption, another is a higher capacity 10 kWh model for customers who also wanted backup power.


2.Powerwall 2

The Powerwall 2 was unveiled in October 2016. Compaed with others, The Powerwall 2 had a 13.5 kWh capacity and was capable of delivering 5 kW of power continuously and up to 7 kW of peak power in short bursts (up to 10 seconds). After 5 years, 100000 Tesla Powerwall 2 has been installed. Compared with Powerwall 1, Tesla Powerwall2 use the larger 21-70 cells, which have a 21mm diameter and are 70mm long.  Tesla original Powerwall 1 used the smaller 18650 size cells.



On April 29, 2021, Tesla started filing for building permits for projects that would use the Powerwall+, a device that combines the functions of a Powerwall2, the Tesla Backup Gateway and the Tesla solar inverter. Up to 10 Powerwall 2 or Powerwall+ units may be combined to expand the capacity and maximum power of the system


Model Introduced Price (US$)[a] Capacity (kWh) Maximum Power Weight Dimensions, H × W × D Operating temperature Cycles (during 10 year warranty)
Continuous Peak (10 seconds)
Powerwall 1 (discontinued) April 2015 $3,000 6.4[30] 3.3 kW[31] 214 lb (97 kg) 51.3 in × 34 in × 7.2 in (130 cm × 86 cm × 18 cm) −4 to 110 °F (−20 to 43 °C) 5,000[32][33]
Powerwall 2 October 2016 $5,500, later $6,500 13.5 (usable)[34] 5 kW 7 kW 251.3 lb (114.0 kg)[35] 45.3 in × 29.6 in × 5.75 in (115.1 cm × 75.2 cm × 14.6 cm) −4 to 122 °F (−20 to 50 °C) Unlimited (Used for solar self-consumption, time of use load shifting or backup power)
37.8 MWh of aggregate throughput (other applications)[36]