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Tesla Powerwall 2
Powerwall 2
Excellent
  • Usable Capacity: 13.5kWh
  • Roundtrip Efficiency: 90%
  • Warranty: 10 Years
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AC-coupled to seamlessly add to an existing solar system.NMC battery chemistry for a more affordable storage system.Provides backup power for power outages and blackouts.Stores excess solar energy during the day and use it at another time.

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AC-coupled to seamlessly add to an existing solar system.NMC battery chemistry for a more affordable storage system.Provides backup power for power outages and blackouts.Stores excess solar energy during the day and use it at another time.

See all Tesla Solar Batteries See all Solar Batteries
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Connection Type (AC or DC)
AC
Chemistry
Lithium-ion
Audience
Residential
Total Capacity
13.5kWh
Usable Capacity
13.5kWh
Power: Peak
10kW
Power: Continuous
5kW
Depth of Discharge
100%
Degradation
3.0%
Roundtrip Efficiency
90%
The key characteristics of a battery are the power output, usable capacity and efficiency with which it stores and discharges electricity. Other characteristics, like the chemistry of the battery, help to determine how effective it is at storing electricity.
Warranty
10 Years
Warranty Cycles
3200
End of Warranty Capacity
70%
Warranties are an indication of the overall quality of the battery. Look for a high number of cycles, a high percentage of end-of-life usable capacity, and a large number of years warrantied.
Battery Dimensions
1150 mm L
755 mm W
155 mm D
Traits
  • Scalable
  • Off-Grid Capable
  • Backup Capable
The physical characteristics of a battery help determine whether you’ll need an entire garage of batteries or a wall-mounted, radiator-size battery. Beyond just storing energy, batteries have a number of additional traits, such as being able to easily scale in size or to provide power if the grid goes down.
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Energy storage manufacturers may have a background in chemical industries or in making larger-scale batteries, such as building batteries for electric vehicles. Manufacturers may either make the battery cells themselves or assemble the batteries into a comprehensive energy storage system.
Organizations like the International Electrotechnical Commission (IEC) and Underwriters Laboratories (UL) create national and international standards for energy storage systems to ensure any products on the market meet certain specifications for safety and reliability reasons.
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