Best Solar Batteries: Top Picks and Comprehensive Buying Guide for 2022

Introduction to Solar Batteries

The best solar batteries as of recent ratings include the Tesla Powerwall 2, known for its large capacity and advanced software, and the LG Chem RESU, recognized for its reliability and efficiency. Other top-rated solar batteries include the Sonnen eco and the Enphase Encharge, both celebrated for their long life spans and intelligent software. Please note that the best option may vary depending on specific personal requirements such as the size of the solar power system, budget, and environmental conditions.

Best Solar Batteries for 2022

Every year, solar technology advances, and with it, the efficiency and capabilities of solar batteries. Here are the best solar batteries to consider in 2022:

See also: Best Battery For 50 Watt Solar Panel (Key Choice)

Sonnen EcoLinx: Best for Virtual Power Plants

Germany-based Sonnen offers the EcoLinx, a unique product on the “smart energy storage” market. Seamless integration with home automation systems and intelligent energy management make it an urban-forerunner for virtual power plants. While slightly on the pricier side, you’re investing in advanced technology and a sleek, modern design with this comprehensive system.

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LGES 16H Prime: Best Affordable Battery

While LG might be better known for its consumer electronics, their energy storage solution, the LGES 16H Prime, is a solid, affordable choice. It offers reliable functionality with a reasonably high energy capacity and efficiency rates that can power your home through the night or blackouts.

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Tesla Powerwall: Best Overall Solar Battery

Innovation has become synonymous with Tesla, and the brand’s Powerwall stands tall as the overall best solar battery in 2022. This home battery system provides excellent energy storage solutions, high electric load handling, sleek aesthetic, and some intriguing add-on perks like the ‘Storm Watch’ feature, making it a favorite for many homeowners.

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Generac Pwrcell: Best Affordable and Modular Battery

Generac’s PWRcell is a cost-efficient solution that sports modularity, allowing you to add capacity as needed. With its ability to expand from 8.6kWh to 17.1kWh, it offers an attractive solution to evolving energy needs.

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Bluetti EP900 Home Battery Backup: Powerful and Modular Option

For those who demand high power and storage capacity, Bluetti’s EP900 packs a punch. This battery gives a whopping 5.6kW of continuous output and a giant 9.6kWh storage capacity, making it ideal for power-hungry households and appliances.

See also: How to Connect Solar Panel to Battery: A Step-by-Step Guide for Beginners

SunPower SunVault: Best for Highest Usable Capacity

SunPower’s SunVault integrates seamlessly with their solar panel solutions and provides a high usable capacity, ensuring your energy demands are consistently met. Moreover, the battery enhances power availability during nights and grid outages.

See also: How Long Does a Solar Battery Last? Unveiling Facts and Factors Influencing Lifespan

SonnenCore+: Best for System Customization

SonnenCore+ comes as a compact, high-tech, and affordable solution for those looking for more customizability. It allows you to stack and expand, adjusting energy storage to match your unique needs.

Enphase IQ: Best for Efficiency

The Enphase IQ battery is top-tier when it comes to efficiency. It’s small, compact, and provides great energy throughput. Its scalable nature also means you can increase your storage capacity as your solar system expands.

Generac PWRcell: Our Pick for Durability

In the world of the best solar batteries, Generac PWRcell deserves another mention for its durability. It comes with robust build quality and can withstand harsh conditions, making it a solid powerhouse for long-term use.

LG RESU Prime: Best for Compact Batteries

For those pressed for space, LG’s RESU Prime is your ticket. With an ultra-compact design, this stellar battery offers efficient power in a small package. Don’t be fooled by its size though – it’s a little giant when it comes to performance.

In-Depth Understandings of Solar Batteries

In-Depth Understandings of Solar Batteries

To make an informed decision about the best solar batteries, you should understand how they work, their pros and cons, and the different types available.

How Solar Batteries Work?

A solar battery stores the energy produced by solar panels for later use. When the panels produce more electricity than your home needs, the excess energy goes into charging the battery. At night or on cloudy days, when your panels aren’t producing electricity, your home draws power from the battery.

Pros and Cons of Solar Batteries

On the pro side, solar batteries let you store excess solar energy for later use, provide backup power during outages, and allow you to use solar power even at night. Additionally, they can reduce reliance on the grid and lower your electricity bills.

Cons include initial cost, replacement costs over time, and often cannot fully power your home without adequate sunshine to recharge.

Types of Solar Batteries

The most common types of solar batteries include:

Lithium-Ion Batteries

Lithium-ion batteries are top picks due to their long lifespan, high efficiency, and rapidly dropping price. You’ll find them in many of the best solar batteries lineups (Powerwall, Sonnen eco, just to name a couple).

Lead-Acid Batteries

Lead-acid batteries, while older technology and typically offering shorter lifespans, are often more affordable, making them a viable option for budget-conscious homeowners.

Flow Batteries

Flow batteries can theoretically last for a very long time and offer a more environmentally friendly battery solution. However, they’re often physically larger and more expensive upfront.

Nickel-Cadmium Batteries

Nickel-cadmium batteries are durable and resistant to extreme temperatures. They are relatively expensive and less environmentally friendly, making them less popular for residential use.

Factors to Consider When Choosing a Solar Battery

When you set out to find the best solar batteries for your needs, bear these key points in mind:

AC and DC Coupling

Solar energy can be stored as alternating current (AC) or direct current (DC). Differentiating between AC-coupled and DC-coupled storage solutions has implications for how effectively your system will operate, so be sure to coordinate with your solar installer on this aspect.


A solar battery needs to be compatible with your solar inverter for it to function properly. Checking compatibility is therefore critical before making a purchase in order to avoid the unnecessary cost of a system overhaul.

Battery Capacity

Battery capacity (measured in kilowatt-hours) represents the amount of electricity that a battery can store. Ensure that your chosen battery has sufficient capacity to power your home during the evening and overnight, when solar panels aren’t generating electricity.

Battery Modularity

Battery Modularity

Some batteries have a modular design, allowing you to increase storage capacity by adding additional units. This can be a good choice if you plan to increase your energy usage or the size of your solar panel system in the future.

Round-Trip Efficiency

Expressed as a percentage, round-trip efficiency refers to the difference between the amount of energy used to charge a battery and the amount of energy it can deliver. Batteries with high round-trip efficiency will provide more economic value over time.

Depth of Discharge

Depth of discharge (DoD) indicates how much of a battery’s energy has been used. Most manufacturers specify a maximum DoD for optimal performance. A higher DoD typically means you will get more useable energy from the battery.

Power Output

This determines how many electrical appliances you can run simultaneously without running out of power. The power output should meet your household’s needs, especially during power outages.

Disaster Readiness

Can the battery detect grid outages and switch to power your home independently? This feature is particularly important if your area experiences frequent power outages.

Power Ratings

This is the amount of electricity a battery can deliver at once, measured in kilowatts (kW). A battery with a high power rating could power your entire home but for a shorter period, while a low-power battery could run a few essential appliances for a longer time.


Price comes in the form of upfront costs and ongoing maintenance costs. In this field, you often get what you pay for – and cheaper isn’t always the most cost-effective.


Ensure that the warranty period is at least a good part of the expected lifespan of the battery. Also, be clear about the conditions under which a warranty claim can be made.

Performance Metrics

Performance metrics such as efficiency and lifespan indicate how well you can expect a battery to perform over its lifetime.

Cost of Solar Batteries

Prices vary significantly depending on the type, capacity, and model of the battery. A good solar battery can range anywhere from $5,000 to $15,000, including installation costs.

Best Rechargeable Solar Batteries

The best rechargeable solar batteries offer a balance of cost, power, capacity, and lifespan. The Tesla Powerwall, the LG Chem RESU, and the Sonnen eco are all great choices in this category.

Best Solar Batteries for Off Grid

If you’re building a completely off-grid power system, you’re going to need a battery that’s reliable and has a high capacity. You can’t go wrong with the Tesla Powerwall or the Goal Zero Yeti series here – both provide robust solutions for consistent power availability.

Frequently Asked Questions About Solar Batteries

Frequently Asked Questions About Solar Batteries

Choosing the best solar batteries can seem like an overwhelming task. To ease the way, here are some FAQs that you might find useful:

Do Solar Batteries Qualify for Federal Tax Credit?

You’re in luck! Solar batteries can indeed qualify for federal solar tax credits (ITC) as long as they’re charged by renewable energy – i.e., your solar panels.

How Long Do Solar Batteries Last?

On average, a solar battery is likely to last between 5 and 15 years. However, robust choices like Tesla’s Powerwall claim a usable life of more than two decades. Remember, regular maintenance can extend the life of your battery.

How Many Solar Batteries Do I Need to Go Off-Grid?

The number of solar batteries you need depends on the amount of energy you use in your home, the size of your solar panel system, and whether or not you’re connected to the grid. A professional solar installer can help you determine the best set-up for your unique situation.

Can a Solar Battery Power My House During an Outage?

Absolutely! A home with a charged solar battery and solar panels installed can function entirely ‘off-grid’ for a period, ensuring continuous power during an outage.

Which Solar Battery Is Best for a Residential Solar Panel System?

The best solar battery for your residential solar panel system depending on your particular needs, but top contenders include the Tesla Powerwall, Sonnen eco, and LG Chem RESU.

Can You Run a Whole House on Solar and Batteries?

Yes, but factors like your home’s energy usage, the size of your solar panel system, and the capacity of your solar battery will determine duration.

Are Solar Batteries Permissible for Solar Incentives?

Various local, state, and federal solar incentives are applicable to solar batteries. For example, in the USA, the Federal Solar Investment Tax Credit (ITC) does cover batteries.

How Many Years Can Tesla Solar Batteries Last?

Tesla solar batteries, like the Powerwall, come with a 10-year warranty, but they are designed for a functional life of 15+ years, given proper maintenance and usage.

Can I Add a Battery to an Existing Solar System?

Absolutely! It’s quite possible to retrofit a solar battery onto an existing solar system, but it’s important to check the compatibility of the battery with your current system first.

Are Solar Batteries Worth It Financially?

Solar batteries may have significant upfront costs, but their ability to store excess energy for later use, potential to provide backup power during outages and ultimately reduce your energy bills can make them a financially sound investment.

Methodology of Evaluating Solar Batteries

When evaluating the best solar batteries, we considered factors like easy installation, cost-effectiveness, life expectancy, storage capacity, and warranty. We also reviewed customer experiences and industry reputations of the manufacturers.

Conclusion: Choosing Your Best Solar Battery

Choosing the best solar batteries for your energy needs takes a good amount of consideration. You should balance key factors such as cost, performance, longevity, and size against your household’s specific requirements. Whichever you choose, investing in a solar battery is a step forward towards a sustainable and self-sufficient energy future that’s not only good for your pocket but also for the planet.

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Elliot has 20+ years of experience in renewable technology, from conservation to efficient living. His passion is to help others achieve independent off-grid living.

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