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In this review of the best solar batteries, you’ll learn:
We work with a panel of solar experts to create unbiased reviews that empower you to make the right choice for your home. No other site has covered renewables as long as us, which means we have more data and insider information than other sites.
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Note:In July 2024, SunPower notified dealers it would be halting all new shipments and project installations. The company also noted it would "no longer be supporting new Leases and PPA sales nor new project installations of these financing options."
If you''re looking for improved solar savings and blackout protection for your home, then adding a solar battery to your solar array is a great option. Most people knowabout the Tesla Powerwall,and while it''s a great product, it doesn''t mean it’s the best solar battery out there.
In this guide, we''ll be discussing what we believe are the top five best solar battery manufacturers to choose from for home solar power systems. These include the following:
We''ll explain why each is a great option for these purposes and help you decide which is the best one for your needs below. You can click on the drop-down menus under each battery option for more detailed information.
Tesla is a leader in the industry in terms of technology, and the different Powerwall batteries are a clear reason why. The energy storage systems from Tesla are sleek, perform better than most other options on the market and come with some impressive technology that makes them super convenient to use. The high demand means the waitlist for products is quite long, but we feel they''re still some of the best options available.
We recommend Tesla solar batteries for homeowners who want the best of the best and don''t mind waiting a few months for supply to catch up with demand.
There are so many positive things to say about Tesla''s solar batteries. First off, they''re expensive, but the cost per kilowatt-hour (kWh) is well below the industry average at just $851. In fact, they''re some of the most affordable backup batteries when taking capacity into account.
Tesla''s solar batteries have outstanding performance specifications. The capacity is above the industry standard—13.5 on the Powerwall+ as opposed to the typical 5.1 kWh—and they have the highest total capacity we''ve seen.
These are modular batteries, so you can connect 10 Powerwalls in series for a maximum storage capacity of 135 kWh. That means they should keep just about any home powered through a blackout, even if you have an above-average electricity consumption rate.
The batteries have an above-average peak output for high-demand homes. They have some impressive technology included at no cost, and they also come equipped with features like Storm Watch, which automatically recharges your batteries if severe weather is headed your way.
The downside to buying a solar battery from Tesla is the delay you''re likely to experience between ordering and installation. Tesla''s competitors are likely running into the same supply chain issues, but they have a much lower demand for their products, so they can often be installed shortly after ordering.
Tesla has also been in the news in the past few years for social sustainability issues, including claims of racism in its production facilities. These claims haven''t been substantiated yet, but this is a potential negative to consider.
Read ourfull review of Teslafor more information.
Tesla has two solar batteries in production: the Powerwall and the Powerwall+.
Tesla''s battery warrantyis close to the industry standard. The warranty term is 10 years, which is average, and the guaranteed remaining efficiency at the end of the warranty is 70%, which is just a touch below average.
Tesla has a good reputation for responding to warranty claims, so you''re unlikely to run into major issues if you do have a problem with your battery performance. On average, your Tesla battery should last a minimum of 10 years, but many customers find that they last 15 to 20 years.
Tesla Powerwalls cannot be purchased separately for a DIY installation, which is the case for most batteries on the market. Much like it does for its solar panels, the company uses a massive network of third-party installers to distribute and install its batteries, so you should have no problem finding an installer in your area to tackle the installation.
Tesla also recently started allowing battery installations independently of solar panels, so you can now have your Powerwalls installed as backup electric generators even if you don''t have a solar panel system on your roof. The best part is that you can still take solar incentives and rebatesthat apply.
Panasonic is a major player in the industry, and its batteries are some of the best alternatives to the more well-known Powerwalls from Tesla. The batteries provide outstanding value for the money, with below-average pricing per kWh, some of the highest per-battery capacities in the industry and outstanding performance specifications.
Panasonic has a slightly below-average warranty, but we still think it''s a great option for anyone looking to get the most bang for their buck.
What We Like Some of the best things about Panasonic''s solar batteries are the high capacity and the above-average performance specs. The Evervolt 2.0 battery has a massive capacity of 17.5 kWh, which is more than double the industry average. The batteries are expensive, but on a per-kWh basis, you''ll pay just $857, which is around 25% lower than most other battery options.
Panasonic''s batteries have an industry-leading continuous power output of 9.6 kWh and a peak output of 12 kWh, so they''re a great option for you if you have high energy demands or multiple people living in your home. They''ll be able to run multiple appliances and electronics — including electric vehicle (EV) chargers — at once without you having to worry about damaging your equipment.
Panasonic''s batteries can also be connected in series for a total storage capacity of 102 kWh, so it''s a great option for keeping excess energy at the ready for long blackouts or offsetting expensive energy consumption at night.
The biggest downside to purchasing a Panasonic battery, in our opinion, is the upfront cost per battery. Even though the Evervolt series has a low per-kWh battery, it also has a high capacity, which means a minimum cost of around $15,000.
The least amount of money you can spend on a Panasonic battery is around 300% of what you might spend on smaller batteries. As such, we feel this battery provides outstanding value for the money, but it''s not ideal if you only want emergency backup power.
Read our full review of Panasonic for more information.
Panasonic manufactures two main solar batteries: the EverVolt and the EverVolt 2.0.
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