Best solar batteries

What are the best solar batteries available? Top brands and products of 2022 compared

Storage systems are becoming increasingly attractive home upgrades for homeowners across the country. Whether you’re looking for self-consumption, rate arbitrage during peak hours, or back-up power in case of emergencies, storage systems can provide greater independence, resiliency, and savings–especially if you have solar panels and live in a state without net metering

Because storage systems have become so popular, many companies are now in the market, making it more challenging to compare and decide between the different brands and products available. In this article, we’ll explain some of the most important factors for comparing solar batteries and we’ll discuss some of the best brands and products available now.

This is an unbiased review: EnergySage is not paid to review brands or products, nor do we earn money from affiliate advertising in this article. The content of this blog is based on research and information available at the time of writing. Learn more about our mission and how we make money as a company.

Find out what solar + storage costs in your area in 2022

Key takeaways:

  • Comparing solar batteries can be challenging, but it’s important if you want to find the storage system that best fits your needs.
  • Some of the major metrics for comparing solar batteries fall under: chemistry & configuration, power & performance, warranty, and price. 
  • The top brands and products for solar batteries include: Enphase’s IQ Battery, Generac’s PWRcell, Tesla’s Powerwall, Panasonic’s EverVolt, sonnen’s eco, LG Chem’s RESU, Electriq Power’s PowerPod 2, SunPower’s SunVault, and SolarEdge’s Energy Bank.
  • Visit the EnergySage Marketplace for custom quotes from pre-vetted installers for solar-plus-storage systems. 

How to compare solar batteries

There’s a lot to consider when choosing a solar battery! We’ve broken it down into four different categories: chemistry & configuration, power & performance, warranty, and, of course, price. We’ll explain some of the major considerations for each category and then show how the top brands and products stack up. To get a full breakdown of how to choose your battery, check out this article.

Chemistry & configuration

Understanding the different chemistries and configurations available for solar batteries can be difficult, so we’ve outlined some different factors you’ll want to consider before choosing the battery that’s right for you.

  • Chemistry: lithium-ion batteries come in various chemistries, but the top batteries on our list are either Lithium Nickel Manganese Cobalt Oxide (NMC) or Lithium Iron Phosphate (LFP). NMC batteries are perhaps the most common solar batteries, but LFP batteries are starting to gain traction because they tend to have higher power ratings and longer lifespans. 
  • Integrated inverter: batteries can come with or without an integrated inverter. Storage systems without an integrated inverter need to be paired with an external, third-party inverter. Storage systems with an integrated storage inverter are able to convert the usable alternating current (AC) energy from your home to storable direct current (DC) energy, and back again. If your storage system has an integrated hybrid inverter, it can cover both the production from your solar panels and the requirements of your storage system, providing efficient integration for solar-plus-storage systems. 
  • Coupling: batteries can be either AC- or DC-coupled. AC-coupled storage systems have traditionally been the most common for residential solar systems because they are easy to install, especially if you already have solar panels and are retrofitting your storage system. However, if you’re planning to install a new solar-plus-storage system, installing a DC-coupled storage system may be a better option because it will provide a higher overall efficiency. 
  • Flexibility of configuration: many battery manufacturers offer different configurations for your storage system so you can size your system according to your needs. Some offer a series of batteries with different capacities and many batteries can be “stacked,” which means that you can add additional batteries to build the storage capacity that you want. 

At a glance: chemistry & configuration of best batteries

BatteryChemistryIntegrated inverterCouplingFlexibility of configuration
Enphase IQ BatteryLFPYes - storageAC2 different capacity, can stack up to 4
Generac PWRcellNMCYes - hybridDC4 different capacities, can stack up to 2
Tesla PowerwallNMCNo, unless you get Powerwall+ACCan stack up to 10
Panasonic EverVoltNMCYes - storageAC or DC2 different capacities, can stack up to 6 (DC only)
sonnen ecoLFPYes - storageAC7 different capacities
LG Chem RESUNMCNoACCan stack up to 2
Electriq Power PowerPod 2LFPYes - hybridAC or DC3 different capacities, can stack up to 3 (AC) or 4 (DC)
SunPower SunVaultLFPYes - storageAC2 different capacities
SolarEdge Energy BankNMCYes - hybridDCCan stack up to 3 per inverter, up to 3 inverters per system

Power & performance

To choose the storage system that meets your needs, you’ll want to compare the power and performance of the different offerings before making a decision. We’ll explain some of the key factors that impact your battery’s power and performance.

  • Usable capacity: measured in kilowatt-hours (kWh), usable capacity is a measure of the maximum amount of electricity stored in your battery on a full charge.
  • Continuous power rating: measured in kilowatts (kW), a battery’s power rating determines the maximum amount of electricity that can be output consistently. 
  • Depth of discharge: the depth of discharge (DoD) indicates the percentage of the battery that has been discharged relative to the overall capacity of the battery. Many battery manufacturers specify a maximum DoD level for optimal battery performance and generally batteries with higher percentages are considered better quality products. 
  • Roundtrip efficiency: the roundtrip efficiency is a measure of electrical losses involved with charging and discharging a battery. The higher the percentage, the more efficient the battery is at converting incoming electricity into stored electricity, and then back into usable electricity. 

At a glance: power & performance of best batteries

BatteryUsable capacityContinuous Power ratingDepth of dischargeRoundtrip efficiency
Enphase IQ Battery3.36, 10.08 kWh1.28, 3.84 kW100%89%
Generac PWRcell9, 12, 15, 18 kWh3.4, 4.5, 5.6, 6.7 kW84%96.5%
Tesla Powerwall13.5 kWh5.0 kW100%90%
Panasonic EverVolt11.4, 17.1 kWh4.6, 5.5 kWNot disclosed84% (AC), 89% (DC)
sonnen eco5, 7.5, 10, 12.5, 15, 17.5, 20 kWh3, 4, 8 kW100%81.6%
LG Chem RESU9.3 kWh5.0 kW95%94.5%
Electriq Power PowerPod 210, 15, 20 kWh7.6 kWNot disclosed96.6%
SunPower SunVault12, 24 kWh6.8 kWNot disclosed> 86%
SolarEdge Energy Bank9.7 kWh5 kW for one, 10 Kw for two or more100%94.5%


Sifting through warranties for the information you need can be confusing and time-consuming. We’ll discuss some of the key things to look for in battery warranties and assess how the top brands and products compare. Check out this article for more information on solar battery warranties. 

  • Warranty period: most popular energy storage systems come with a 10-year warranty that covers the integrity and output of your system. 
  • End of warranty capacity: many manufacturers promise a certain level of performance by the time your warranty term is up. To calculate the warrantied capacity at the end of the warranty term, multiply the end of warranty capacity by the battery’s usable capacity.
  • Cycle clause: each time you drain and charge your battery, it’s called a cycle. Each cycle slightly reduces your battery’s ability to hold a full charge–thus, some manufacturers include a cycle clause which means that if you hit your warrantied number of cycles before your battery reaches the end of its warranty period, it could end your warranty term. 
  • Throughput clause: the throughput clause includes the total energy a manufacturer expects the battery to deliver throughout its lifetime. Stated in terms of megawatt-hours (MWh), these clauses stipulate that if you reach your battery’s throughput before the end of its warranty period, it could end your warranty term. For easy comparison, we’ve stated the throughput clause by kWh of usable capacity. To calculate the total throughput, simply multiply the number we’ve provided by the usable capacity of the battery.  

At a glance: warranties of best batteries

BatteryWarranty periodEnd of warranty capacityCycle clauseThroughput clause
Enphase IQ Battery10 years70%4,000 cyclesN/A
Generac PWRcell10 yearsN/AN/A2.5 MWh / kWh
Tesla Powerwall10 years70%N/A2.7 MWh / kWh for commercial applications, none for most residential applications
Panasonic EverVolt10 years60%N/A2.65 MWh / kWh
sonnen eco10 years70%10,000 cyclesN/A
LG Chem RESU10 years60%N/A2.4 MWh / kWh
Electriq Power PowerPod 210 years70%N/A3 MWh / kWh
SunPower SunVault10 years70%4,000 cycles2.9 MWh / kWh
SolarEdge Energy bank10 years70%N/AN/A


Comparing the price of batteries isn’t exactly straightforward. The cost of your battery will vary based on the factors we’ve outlined so far and could reflect the cost of the total installation or just the Manufacturer’s Suggested Retail Price (MSRP). It’s important to assess the price of batteries next to the usable capacity, as this will have the greatest impact on what you pay. You’ll also want to consider the different configurations that are available because it can sometimes be cheaper to stack two smaller batteries than to install one large one. 

At a glance: usable capacity vs. price of best batteries

BatteryUsable capacityPrice
Enphase IQ Battery3.36 & 10.08 kWhFull installation: $6,000 to $20,000
Generac PWRcell9 to 18 kWhFull installation: starting at $9,999
Tesla Powerwall13.5 kWhFull installation: $12,000 to $16,500
Panasonic EverVolt11.4 & 17.1 kWhFull installation: $15,000 to $20,000
sonnen eco5 to 20 kWhJust battery: starting at $10,000
LG Chem RESU9.3 kWhFull installation: $9,500 to $13,000
Electriq Power PowerPod 210 to 20 kWhJust battery: likely more than PowerPod 1, which is $9,799 to $19,999
SunPower SunVault12 & 24 kWhFull installation: about $15,000 for smaller battery
SolarEdge Energy Bank9.7 kWhFull installation: about $6,000 to $8,000

Best solar batteries

We evaluated solar battery brands and products based on the metrics described above to create a list of the best solar batteries available today. Each battery comes with different pros and cons: the best storage solution for you may not be the best solution for your neighbor! Be sure to take a look at what we consider to be the highlights of each battery so you can choose a solution that best fits your needs. If you’re interested in learning more about the batteries we’ve included in our list, you can check out our more in-depth reviews of each product, or you can head over to the EnergySage Buyer’s Guide, where you can compare different types of equipment based on efficiencies, warranties, and more. 

Enphase IQ Battery

Highlights: inverter integration, battery chemistry, and DoD.

Enphase is one of the biggest names in inverter technology, but in 2019 it entered into the battery market with the Enphase Encharge, which was recently rebranded as the IQ Battery. Thus, it’s no surprise that one of the biggest draws of the IQ Battery is its fully integrated Enphase IQ Series microinverter technology. The IQ Battery also uses state of the art LFP chemistry, which generally translates to a longer lifespan for your battery and allows for its impressive DoD of 100 percent.

To read our full review of the Enphase IQ Battery, check out this article

Generac PWRcell

Highlights: roundtrip efficiency and price.

Generac has long been a leader in the backup power space, but recently made its foray into energy storage when it acquired battery manufacturer Pika Energy in 2019 and subsequently launched the Generac PWRcell. The PWRcell has one of the highest roundtrip efficiencies of the batteries on this list at 96.5 percent. It’s also one of the more affordable storage system options available and is best if you’re looking to install solar-plus-storage because it’s a DC-coupled setup, which means higher overall efficiency. 

To read our full review of the Generac PWRcell, check out this article.

Tesla Powerwall

Highlights: stackability, DoD, warranty, and price.

Tesla has quickly become one of the biggest names in the home energy storage market after launching the Tesla Powerwall in 2015. The Powerwall has a sleek design and is built to be stackable, meaning you can include multiple Powerwalls in your storage setup to increase your usable capacity. Tesla’s Powerwall also boasts a DoD of 100 percent, and Tesla backs up their battery with a competitive 10-year warranty that includes a throughput clause of 37.8 MWh (2.7 MWh / kWh) for commercial applications and no throughput clause for most residential applications and a guarantee of 70 percent capacity at the end of the warranty term. The Powerwall also runs at the lower end of the price range for solar batteries. 

To read our full review of the Tesla Powerwall, check out this article.

Panasonic EverVolt

Highlights: flexibility of configuration.

Panasonic is one of the world’s largest battery cell manufacturers and in 2019, they officially entered the solar battery market with the launch of the EverVolt. The EverVolt is highly configurable, allowing you to design the storage system that fits your needs. It comes in two different capacities–11.4 kWh and 17.1 kWh–which can both be either AC- or DC-coupled. This means that if you already have a solar system, you can easily retrofit the EverVolt with the AC-coupled model, or if you are installing solar-plus-storage, you might want to choose a DC-coupled model, allowing for higher efficiency. With the DC-coupled version, you can also stack up to six EverVolt batteries if you want to maximize your energy storage. 

To read our full review of the Panasonic EverVolt, check out this article.

sonnen eco

Highlights: battery chemistry, capacity/power, DoD, and warranty.

In 2016, sonnen, one of the most well known companies in energy storage, announced the sonnen eco. The eco uses advanced LFP battery chemistry, which is known for high power ratings and lifespans. The eco doesn’t disappoint: the largest battery in the lineup boasts the largest maximum power of the batteries in this list at 8 kW and one of the largest usable capacities at 20 kWh. It also has an impressive DoD of 100 percent and a competitive 10-year or 10,000 cycles warranty guaranteeing 70 percent capacity at the end of the warranty term. 

To read our full review of the sonnen eco, check out this article–and if you’re interested in their “luxury” battery offering–the ecoLinx–check out this article


Highlights: roundtrip efficiency and price

LG is a huge name in the home electronics industry and their battery subsidiary, LG Chem, produces one of the most popular solar batteries in the U.S. market: the LG Chem RESU 10H. While the RESU is on the smaller end of usable capacity at 9.3 kWh, it includes a high roundtrip efficiency–the highest of the NMC batteries on this list–at 94.5 percent. It’s also one of the most affordable storage systems in the market, starting at around $9,500 for a full installation and can be a great choice if you’re looking for a smaller storage solution.

To read our full review of the LG Chem RESU, check out this article–and if you’re interested in their newest model–the RESU Prime–check out this article.

Electriq Power PowerPod 2

Highlights: flexibility of configuration, chemistry, capacity/power, roundtrip efficiency, and warranty.

In 2021, Electriq Power, a U.S.-based energy storage company, announced an update to their newest product, the PowerPod 2: instead of only offering a DC-coupled system, similar to the Panasonic EverVolt, they now allow you to choose between DC- and AC-coupled versions. The PowerPod 2 comes in three different usable capacities and you can stack up to three of them for the AC-coupled version, or up to four of them for the DC-coupled version. Electriq Power’s PowerPod 2 uses LFP chemistry, allowing the largest battery in their lineup to have one of the highest power ratings of the batteries on this list at 7.6 kW. This battery also includes one of the highest usable capacities at 20 kWh and the highest roundtrip efficiency of the batteries in this list at 96.6 percent. Electriq Power includes an impressive 10-year warranty to cover the PowerPod 2, with a throughput clause of 3 MWh per kWh, and guarantees 70 percent capacity at the end of the warranty term.

To read our full review of the Electriq Power PowerPod 2, check out this article–and if you’re interested in their original model–the PowerPod 1–check out this article

SunPower SunVault

Highlights: chemistry, capacity/power

SunPower is one of the biggest names in the solar industry and in 2019, they made their foray into the solar battery space with the Equinox Storage system. Now rebranded as the SunVault Storage system, this storage solution includes a battery and a control system that directly ties into SunPower’s solar solution, the SunPower Equinox. The SunVault is designed with advanced LFP battery chemistry, enabling the larger battery in the lineup (the SunVault 26) to have the largest usable capacity on our list at 24 kWh and a fairly high maximum continuous power rating at 6.8 kW.

To read our full review of the SunPower SunVault Storage system, check out this article.

SolarEdge Energy Bank

Highlights: inverter integration, DoD, stackability, and warranty.

SolarEdge offers some of the most widely used string inverters and DC power optimizers in the world and in 2021, they launched their first home battery: the Energy Bank. The Energy Bank comes with fully integrated SolarEdge Energy Hub Inverter and boasts 100 percent DoD. It’s also highly modular, allowing you to stack up to three Energy Banks per inverter, with up to three inverters per system – for a total of up to nine Energy Banks at 87.3 kWh. SolarEdge’s Energy Bank comes with an industry standard warranty of 10 years, but unlike most battery warranties, does not restrict usage with a cycles or throughput clause.

To read our full review of the SolarEdge Energy Bank, check out this article.

Choosing the best solar battery for your home

The best way to decide on a solar-plus-storage system is to compare multiple quotes. On the EnergySage Marketplace, you’ll receive free, online quotes from pre-vetted installers and free advice from our team of Energy Advisors. Choosing a reliable installer can significantly reduce your risk of encountering battery issues down the line. Interested in a certain battery product? Simply make a note in your profile so installers know to include that product in your quotes. 

Find out what solar + storage costs in your area in 2022

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About Emily Walker

Emily is a Content Marketer at EnergySage, where she's an expert in making energy fun and easy to learn about! She has a background in environmental consulting and has degrees in Environmental Science and Biology from Colby College. Outside of work, Emily is pursuing a Master of Science from Johns Hopkins University in Environmental Science and Policy. She also loves hiking, tending to her collection of houseplants, and trying out new restaurants and breweries whenever possible.

9 thoughts on “What are the best solar batteries available? Top brands and products of 2022 compared

  1. Steve Archer

    I have a working, 16 panel solar system. What I DON’T have is a battery back-up system. I’ve talked to, and left messages to almost every solar company in Tucson, Arizona. They ALL say “If we didn’t install it, we can’t provide solar batteries. And the company that provided the panels can’t get and install batteries…
    Can you help me?

  2. Dan

    This was a great article! I was expecting another of the many fluff articles I’ve seen across the various web sites that talk about batteries to use with a PV system. You know – they say this battery company is good, this one is good, and this other one is good. Very rarely do they give the nitty-gritty details on battery chemistry, the power density, the DoD, and so on. This article was a very pleasant surprise with the technical details that it contained. Although I’m not ready to buy batteries (I need to build my home first), at least now I have a better idea of where I want to focus my attention if and when I do decide to install batteries. And they hardly ever give pricing details.

    Keep up the good work, and keep the technical articles coming!

  3. Tom Handza

    Great article for a person beginning to understand battery storage systems.
    If stackable allows to increase the power output rating as well and the KWh stored you should add that to the tables. What is the max power draw for typical house? 10,15 ,20 KW? What is the cost of electronics to modulate current demand from the house? I.E. turn off the AC to keep the max draw below the power rating of the battery.
    I think there is one typo. The Electriq power pod has highest power rating on this list at 7.6 “KWh”. Should be KW not KWh.

  4. Jim

    Your tesla powerwall information is way out of date. tesla is ONLY selling Powerwall 2.1 now. Also Powerwall 2 & 2.1 allow up to 10 units,not 6 as you listed. The usable kWh is 13.5 per module and almost 10kW now not 5. Units made after 10/2020 have the significant upgrade, and should be all that’s available by now.

  5. Roger B Midura

    What a wonderful, balanced explanation of the various solar and storage options available to us homeowners. Hopefully you will monitor and analyze future solar and storage incentives (when proposed and hopefully enacted by the Biden administration).

    As people around the world become more aware of global warming’s consequences, alternative energy solutions will become a fierce competitive marketplace of ideas that need objective clarification!


    This was very helpful. It is so hard for non-chemistry folks to get all this straight. We have panels, but the batteries have been out of reach.


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