Best Solar Batteries (2022): Reviews & Comparison

For many people, solar power is the way of the future. It's a renewable, sustainable energy source that can help reduce your carbon footprint. And, thanks to advances in technology, it's becoming more and more popular. If you're thinking about making the switch to solar, one of the first decisions you'll need to make is what type of solar battery to use. With so many options on the market, it can be hard to know where to start. But don't worry - we're here to help. In this article, we'll introduce you to the best solar batteries on the market. So whether you're looking for the most powerful battery or the most budget-friendly option, you'll be sure to find what you're looking for.

Which are the best solar batteries?

When the power goes out, it can be a major inconvenience. No electricity means no lights, no heat, and no way to cook food. And if the outage lasts for more than a few hours, it can start to take a toll on your health and well-being. That's why having a backup power source is so important. 

Finding the best solar batteries can be a tricky task because there are so many different types and brands on the market. However, we have compiled a list of the best solar batteries to help you make an informed decision.

Tesla Powerwall

One of the most popular solar batteries on the market is Tesla's Powerwall, and it's easy to see why. It can supply almost half of the average household energy consumption each day with a capacity of 13.5 kWh. And at $8,500, it's relatively affordable compared to other solar batteries.

In addition, the Tesla Powerwall has a 100% depth of discharge, which means that all of the battery's charge can be used without affecting its lifespan. The Powerwall has a round-trip efficiency of 90%, meaning that it loses very little energy when converting solar power to stored electrical power. And finally, the Powerwall comes with an efficient warranty of 70% for ten years, ensuring that homeowners will get maximum value out of their investment.

Delta BX6.3

Another reliable, high-powered option is the Delta BX6.3. With a great capacity of 6.3 kWh and 80% DoD, this battery can store a significant amount of energy. Installation costs will vary depending on the specific situation, but the battery itself costs about $7,400. One of the key features of the Delta BX6.3 is its convection cooling system. This whisper-quiet system eliminates the need for fans or pumps, making it a more efficient and eco-friendly option. In addition, the Delta BX6.3 comes with a 10-year warranty, ensuring that customers will get their money's worth out of this investment.

Generac PWRcell

The Generac PWRcell battery is a versatile and affordable option for backup power. This battery has a modular design, so you can start with a small system and add more batteries later if needed. The PWRcell battery offers up to 18 kWh of continuous backup power when paired with a solar panel system. This battery is also budget-friendly, making it a great option for those who are looking to save money on their energy costs.

In addition, the battery cabinet is outdoor rated, meaning it can withstand any type of weather conditions, whether it be extreme heat or cold. Installation costs will depend on the size of the battery you select, but on average, a Generac PWRcell will run you about $13,000 to $20,000. This particular battery also boasts a round-trip efficiency of 96.5%. In other words, 96.5% of the energy that is stored in the battery will be available for use when you need it. The Generac PWRcell comes with a 10-year limited warranty, so you can be sure that your investment is protected.


The LG RESU solar battery is a high-quality product that comes in a variety of sizes to meet the needs of different customers. The 6.5 kWh, 9.8 kWh, 13 kWh, and 16 kWh options provide a range of capacity choices, and the DoD for these batteries is at 90%.

In addition, the batteries come with a 10-year warranty and a cycle life of up to 4,000 cycles. The cost of LG RESU batteries is determined by the capacity, with an average range of $6,400 to $7,200 before installation. Overall, the LG RESU solar battery is a great option for those looking for reliable and long-lasting storage for a solar energy system.

Sonnen ECO

Solar batteries are becoming increasingly popular as homeowners look for ways to become more energy-efficient and save money on their electric bills.

If you're looking for a solar battery with a capacity of 2.5 kWh modules at 90% DoD, you can't go wrong with the Sonnen ECO. This Sonnen ECO can store the excess energy your solar panels produce during the day so you can use it at night or during a power outage. The battery also comes with a ten-year warranty, so you can be sure it will last for years to come.

How to find the best solar battery storage?

There are a few things to consider when looking for the best solar battery storage option for your needs.

The first thing to consider is the amount of power you need to store. Solar batteries come in various sizes, so you'll want to make sure you choose one that can hold enough power for your needs. If you only need to store a small amount of power, then a smaller solar battery might be all you need. However, if you want to store enough power to run your home in the event of an extended power outage, then you'll need a larger solar battery.

The next thing to consider is how long you need to be able to store the power for. Some solar batteries are designed to only hold a charge for a few days, while others can hold a charge for months or even years. If you only need to store power for a short period of time, then a smaller, shorter-term solar battery might be all you need. However, if you want to store power for an extended period of time, then you'll want to choose a larger, longer-term solar battery.

Another thing to consider is battery lifespan and warranty. Some solar batteries have shorter lifespans than others, so you'll want to make sure you choose one that will last for as long as you need it. Additionally, some solar batteries come with longer warranties than others, so if you want a solar battery that a warranty will cover, then you'll want to choose one from a company that offers a longer warranty.

Finally, you'll want to consider the price of the solar battery. Solar batteries range in price from a few hundred dollars to several thousand dollars, so you'll want to make sure you choose one that fits within your budget.

Which solar batteries last longest?

There are a few different factors that will affect how long a solar battery will last. The type of battery, the quality of the battery, and how you take care of the battery all play a role in how long it will last.

The three most common types of solar batteries are lead-acid, lithium-ion, and salt water. Of these three, lithium-ion batteries can last the longest and can also provide the best storage capacity.

Are lithium batteries better for solar?

Lithium batteries are often used in solar power systems because they have a number of advantages over other types of batteries. For one, lithium batteries have a much higher energy density than lead-acid batteries, meaning that they can store more energy in a given space. Lithium batteries are also much lighter than lead-acid batteries, so they are easier to transport and install. Finally, lithium batteries have a longer lifespan than lead-acid batteries, so they require less maintenance over time. All of these factors make lithium batteries a good choice for solar power systems.

Are solar batteries worth it?

Solar batteries are definitely worth it and can help you save money on your electric bill, but they also come with a few drawbacks. Aside from its main role to store excess energy from your solar panels, which can then be used to power your home at night, solar batteries can also help you avoid blackouts by providing backup power.

However, solar batteries come with a few drawbacks. These batteries are expensive, and some of them may require maintenance. When choosing a solar battery, it is best to weigh the pros and cons to see if it is the right fit for you.


Solar batteries are a great way to store energy, whether you're using it for your home or business. But with so many on the market, it can be hard to know which ones are the best. In this article, we've looked at some of the best solar batteries available today, as well as what to consider when choosing one. We hope this guide has been helpful in your search for the perfect solar battery.

About the author, Phil Borges

Phil Borges is a battery aficionado. He's written extensively about batteries, and he loves nothing more than discussing the latest innovations in the industry. He has a deep understanding of how batteries work, and he's always on the lookout for new ways to improve their performance.