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Best Solar Battery August 2023

Written by Lisa Iscrupe /

Edited by Hannah Hillson

Last updated 08/24/2023

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Key Points

  • Solar batteries power your home during power outages or times of low production by saving and storing excess energy generated by a solar panel system.
  • In 2023, the average cost of a battery storage system is around $11,000 before installation fees.
  • The best solar batteries of 2023 include modules from brands like Delta, FranklinWH, Generac, LG, Sonnen, and Tesla.

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Solar battery FAQs

  • Solar batteries normally cost between $5,000 to $16,000 in 2023, depending on the size and type. These prices do not include the cost of installation. However, sometimes batteries are included in the cost of buying a solar system. The federal solar tax credit can help lower the net cost of a solar system. If you are leasing your solar panels or signed a power purchase agreement (PPA), check your contract to see if a battery is an option.

  • For most homes, one battery provides enough backup power for essential functions during a temporary power outage.  Additional batteries can be added if needed, and the battery modularity amount can depend on your energy use and how many solar panels your home needs. According to the Energy Information Administration (EIA), the average home uses about 877 kilowatt-hours (kWh) per month. This equals approximately 30 kWh of energy each day. Check each battery’s total capacity to decide how many batteries you would need to power your home.

  • Solar batteries can last between five and 15 years. The lifespan of a home solar battery will be longer if you maintain it and protect it from extreme weather conditions. The DoD also impacts a battery’s total lifespan. If you draw more energy out of the battery than is recommended, you may end up affecting your battery’s efficiency.

  • Yes, a battery storage system is normally a worthwhile investment for solar system owners. Of course, this depends on how much renewable energy your panels generate and how much power your household consumes each day. If your panels generate more power than you can use, batteries are definitely worth the cost. In addition, batteries can help to cut down on electric costs and increase your home’s energy independence. They can also work great with net metering programs in your state in your state, which are similar to renewable energy credits (RECs)).

  • Yes. Most batteries, like the Tesla Powerwall, are weather resistant for indoor and outdoor use, although you may want to consider housing your batteries in a battery cabinet if stored outside. A battery cabinet provides an extra layer of protection from weather or pests. Either your solar installer or an independent technician can advise you on the best place for installation. 

  • Yes, temporarily. The stored energy from a battery will power necessary functions in your home during a temporary power outage. A technician will install a transfer switch to alert your power system to start using the backup battery power during an outage. However, power must be restored before your batteries are depleted in order to maintain continuous electricity to your home.

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