Best Solar Batteries of April 2024
Updated March 25, 2024 at 11:11 am
Whether you already have solar panels or are considering an installation, a solar battery can help unlock several benefits, including continuous access to power during electrical outages and greater control over your ongoing energy expenses.
As an evolving technology that has experienced steady cost reductions in the last few years, solar panel batteries are quickly gaining popularity in the US and homeowners now have more products available to choose from than ever before. In this guide, we highlight some of today’s top solar batteries and detail precisely how to distinguish between your energy storage options in 2024.
Methodology Our research is designed to provide you with a comprehensive understanding of personal finance services and products that best suit your needs. To help you in the decision-making process, our expert contributors compare common preferences and potential pain points, such as affordability, accessibility, and credibility.
Our Picks - Best Overall Solar Battery: Tesla Powerwall 3
- Best for String Inverter Systems: SolarEdge Home Batteries
- Best for Microinverter Systems: Enphase IQ 10 Home Battery
- Best Energy Versatility: Bluetti Home Battery B300
- Best Combination Solar and Storage Solution: SunVault Storage
- Best Included Virtual Power Plant Incentive: The sonnenCore+
- Best Value Brand: LG Electronics Home 8 ESS
7 Best Solar Batteries of 2024
Best Overall Solar Battery
Tesla Powerwall 3
Vault Verified
Why We Chose It
With a name that has practically become synonymous with solar batteries, the Powerwall from Tesla has reached its third official iteration in 2024. According to Tesla the Powerwall 3 is now available in the continental US, Hawaii and Puerto Rico, the powerful and cost-effective Powerwall 3 is proof that Tesla will continue to be a leader in home energy storage for many years to come.
Pros
- Highly-capable system from tech and clean energy giant Tesla
- Large storage capacity with massive total battery bank potential
- Built-in solar inverter for maximum energy efficiency and system performance
Cons
- Difficult to retrofit with existing solar panels without inverter replacement
- Massive battery bank may not be worth it for those looking for smaller buy-ins
- High-demand items with limited quantities and possible product delays
Best for String Inverter Systems
SolarEdge Home Battery 400V
Vault Verified
Why We Chose It
SolarEdge, one of the premier global solar inverter manufacturers, officially started selling home solar batteries in 2021 and now offers some of the best energy storage products on the market. Including units specifically for integration with the company’s single-phase and three-phase string inverter systems, SolarEdge residential batteries are perfect for those replacing an existing SolarEdge inverter or designing a brand-new energy system.
Pros
- Batteries made to work directly with today’s top string inverter technology
- A DC-coupled system enabling 94.5% round-trip efficiency
- The long warranty period includes unlimited cycles for daily battery use
Cons
- Less initial and total battery storage capacity than most other single units
- Potential compatibility issues with non-SolarEdge inverter systems
- Usually more expensive than other batteries in terms of upfront costs
Best Microinverter Systems
Enphase IQ 10 Home Battery
Vault Verified
Why We Chose It
The Enphase IQ 10 is one of the smartest solar batteries available today, packed with intelligent features to enable better home solar energy management with app-based control. As an AC-coupled battery, the IQ 10 is the best choice for solar energy systems with microinverters, which are another popular product from Enphase and part of the company’s total home solutions.
Pros
- Advanced product technology from one of the world’s most innovative solar brands
- Dense modular storage options enable easy custom home battery bank solutions
- Usually more cost-effective than DC-coupled batteries when adding storage to an existing solar array, according to Panasonic
Cons
- Less efficient than most other battery options
- May only be compatible with Enphase microinverter systems
- Some reliability concerns with failure rates and customer service
Best Energy Versatility
Bluetti Home Battery B300
Vault Verified
Why We Chose It
The Bluetti Home Battery B300 is a different sort of solar storage solution for both home energy and electricity on the go. While the Bluetti brand is most well-known for its solar generators, the B300 integrates the company’s dense energy storage technology into home solar systems and enables power to be delivered anywhere you can carry the modular battery packs and inverter system.
Pros
- Unique solar power solution for versatile energy needs
- Low starting costs when compared to other battery options
- Small, modular and portable battery storage for properties with limited space
Cons
- Much smaller storage capacity than other premier home solar batteries
- Shorter expected lifespan than alternatives with a four-year warranty
- May include unnecessary features for those only seeking backup home power
Best Combination Solar and Storage Solution
SunVault Storage
Vault Verified
Why We Chose It
If you are planning an integrated solar panel and battery installation, the SunVault storage system from SunPower is a highly capable device designed to work with the company’s leading solar products and services. As SunPower is one of the best solar companies in 2024, a SunVault battery is an excellent option for anyone seeking a streamlined installation experience.
Pros
- Highly reputable brand known for premium solar equipment and service
- Several capacity options for unique home energy goals
- Includes easy monitoring and energy control with the SunVault mobile app
Cons
- Less efficient than other competing battery brands
- Can come at a premium price alongside other SunPower purchases
- May not be available to non-SunPower solar customers
Best Included Virtual Power Plant Incentive
The sonnenCore+
Vault Verified
Why We Chose It
From international solar storage leader Sonnen, the sonnenCore+ is a German-engineered battery designed for easy integration into most American solar energy systems. With massive storage capacities, easy app control and a unique program for customers to potentially earn thousands of dollars in annual performance bonuses, according to sonnenCore, the sonnenCore+ is a fitting choice for homeowners in California and across the United States.
Pros
- Easy modular battery storage with 10 kWh and 20 kWh units, up to 3 each
- AC-coupled for easy integration into existing solar panel systems
- Included software with app control and smart power settings
Cons
- SonnenConnect Program is currently only available in California
- Less round-trip efficiency than most other solar batteries
- Only available for grid-connected solar energy systems
Best Value
LG Electronics ESS Home 8 ESS
Vault Verified
Why We Chose It
The Home 8 ESS (energy storage system) is a large-capacity solar battery that comes without a massive price tag from LG, a brand well-known for a variety of home electronics. While LG stopped manufacturing solar panels in 2022, the company remains focused on energy storage and management, allowing the Home 8 to be a suitable, low-cost solution for homeowners adding batteries to an existing installation.
Pros
- Large storage capacity at lower price points than other batteries
- AC coupled for easier integration into existing solar energy systems
- Established brand and model that has served homeowners for years
Cons
- Less unique battery capacity options than other modular solar storage systems
- Lower round-trip efficiency ratings than most other solar batteries
- Some customer service concerns given LG’s departure from solar panel production
What is a Solar Battery?
A solar battery is an energy storage device designed specifically to work with a photovoltaic (PV) solar electricity system. In 2024, the majority of home solar batteries use lithium-ion chemistry to safely store the energy generated by solar panels. Once stored, this energy can be used to power your home overnight or throughout local grid power outages.
Why Would You Need a Solar Battery?
- Off-grid applications. If you are installing solar off of the grid, a battery is required to capture all of the power your panels produce. Besides homes, solar batteries are great solutions for recreational vehicles (RVs), boats, campsites, cabins and other off-grid or remote scenarios.
- Emergency preparedness. A solar battery provides a backup source of power that allows you to continuously use the electricity your panels produce in the event of a local electrical outage. Today, many of today’s best solar batteries include features to automatically charge before scheduled or potential weather-related outages.
- High energy consumption habits. Solar batteries allow you to maximize the use of the solar power you generate, thereby minimizing the electricity you need to purchase from utility providers. In regions with high electricity rates or time-of-use billing structures, solar batteries can help ensure that HVAC systems, EV chargers or other high-energy-demand appliances run on battery power, rather than costly grid consumption.
- Greenest home energy. If your goal is to power as much of your life with environmentally friendly electricity as possible, a solar battery is the best step you can take as a homeowner. With added energy independence, you can further reduce your reliance on grid-supplied electricity, which—depending on where you live—may be produced partially or entirely by fossil fuels.
- Participation in grid programs. In the 2020s, several new utility programs have been developed in the US that compensate solar battery owners for the power they share with the grid when local energy demand is at its highest. Therefore, if you would like to help fortify your local electricity grid (and be rewarded financially for doing so), a solar battery can be a great investment.
Types of Solar Batteries
When looking at the different types of solar batteries on the market today, the easiest way to distinguish top-tier products from less reliable solutions is by looking at the battery chemistry.
Lithium Iron Phosphate (LiFePO4 or LFP)
In 2024, lithium iron phosphate batteries (LiFePO4 or LFP) are widely considered the best and most expensive storage energy systems for residential solar purposes. LFP batteries are safer and generally longer lasting than batteries that use other storage chemistries but also may be physically larger (less energy dense) than leading alternatives.
Other Lithium Ion Batteries
Beyond LFP batteries, there are several other lithium-ion chemistries used to store solar power today. Offering higher energy densities than LFP devices, both Nickel Manganese Cobalt Oxide (NMC) and Nickel Cobalt Aluminium Oxide (NCA) batteries can work well for solar storage, especially in instances in which installation space is more limited. NMC batteries are typically cheaper than LFP alternatives, which can also make them more economical for home solar installations.
Lead-Acid
Before lithium batteries were commercially viable, most solar energy generation was stored in lead-acid batteries using a variety of chemistries. While flooded lead-acid batteries require ongoing maintenance and ventilation, sealed lead-acid batteries, like Absorbent Glass Matt (AGM) or Gel, are typically better for home solar energy storage. In general, lead-acid batteries are cheaper than lithium-ion but also more limited in total power capacity and expected system lifetime.
Nickel Cadmium (NiCad)
Although you may be more familiar with nickel Cadmium (NiCad) batteries in the AA or AAA format, the technology can also be used to store solar energy. However, rechargeable NiCad systems do not offer the same premium capabilities as today’s lithium solar batteries. Instead, NiCad storage packs work well for small devices such as solar garden lights.
Flow Batteries
Flow batteries, also known as redox (reduction-oxidation) batteries, are an emerging technology for large-scale energy storage systems. While not yet widely available, flow battery systems utilize chemical components dissolved in a liquid to efficiently store energy in the form of an electrolyte. As the technology has only just arrived on the market, it is uncertain if flow batteries will be as economical for small home installations as other battery chemistries.
How to Choose the Best Solar Batteries for You
Choosing the best solar battery for your installation will depend on several aspects unique to your home, including your electricity demand, any existing solar components and your energy goals. When evaluating your solar panel battery choices, consider these four factors as a roadmap to guide your decision-making.
Chemistry
As outlined in the types of solar batteries section above, chemistry is the most important aspect of a basic energy storage system to consider before making a purchasing decision. Today’s best solar batteries are usually lithium-ion based, utilizing either LFP, NMC or another type of battery chemistry. While lead-acid batteries can function well for single-appliance applications or small energy systems, lithium-based options are going to be the best choice for daily performance and long-term value.
Compatibility
When you install a solar battery, your equipment must be compatible with the other components of your energy system. For example, if you are adding a battery to an existing solar panel array, an AC-coupled device will usually be the best option, according to Energy Sage. On the other hand, a better-performing DC-coupled battery may be just as easy to include if you have not yet installed your solar energy system—and there are no sunk costs. Consider consulting an expert or your original installer before purchasing a solar battery to see if it is compatible with your system.
Capacity
The ideal storage capacity of your solar battery will depend on the goals of your energy system. If you are looking to power your entire life with solar, then you will need a much larger battery bank than someone only seeking a small amount of energy storage for emergencies. As your total battery costs will increase with each unit purchased, it is good to evaluate several options to see what best fits your overall energy demand, budget and consumption habits.
Technology
Finally, solar panel batteries are not only getting cheaper and more efficient, but they are also getting smarter. Today’s top battery brands include intelligent operating modes and seamless integration with many other home systems such as smart thermostats, EV chargers and more. To find the best battery for your lifestyle, consider choosing a product that can help you reach your home energy goals with easy power controls for minimal ongoing upkeep.
Other Solar Battery Options
Beyond the seven best home solar batteries we explored above, there are many other options available today in the constantly evolving renewable energy marketplace. Here are three more solar panel batteries to consider from a few of today’s most well-known solar brands,
Canadian Solar EP Cube
Launched to consumers in 2023, the EP Cube from Canadian Solar subsidiary CSI Solar, is one of the newest battery brands that homeowners can trust for their solar power storage. This highly capable battery can be added to new or existing solar panel systems of all kinds, including those with Canadian solar panels. While the product is still relatively new, the EP Cube is a slim, powerful and highly customizable solution with 9.9 kWh and 19.9 kWh capacity options.
Generac Power Systems PWRCELL
From American manufacturer Generac, the PWRCELL is an excellent solar battery choice for homeowners today, alongside the Fortune 1000 company’s generator and clean power products. Like many of today’s top brands, the PWRCELL system features efficient, modular hardware and smart energy storage operating modes for great user experiences and a 10-year product warranty.
Renogy Solar Generator
If you are looking for a high-quality and easy-to-use solar battery to power something other than your home, a solar generator (or portable power station) from Renogy is a great solution. Like the Bluetti, a Renogy solar generator can be used to capture solar power anywhere in the world, including remote sites, recreational vehicles and pop-up events.
Frequently Asked Questions
Are Solar Batteries Worth it in 2024?
Although purchases usually include a relatively large upfront cost, solar batteries may be worth it for homeowners in the US today, both financially and for greater energy independence. With a battery, you can gain more control over your home’s solar energy, which can help further reduce your electricity spending and enable a sustainable power supply during local grid outages. While solar batteries may not always be worth it financially, industry advancements and decreasing price points are making the technology more affordable every year.
Where Can You Buy Solar Batteries?
When buying a solar battery for your home, there are two main routes you can take. The first is purchasing a solar battery directly from the manufacturer and the second is allowing your installer to source the equipment themselves. Although purchasing a battery directly from the source can work well to keep costs low in a standalone storage system, buying a solar battery in the same transaction as your solar panels is the best way to ensure all of your system components will work well together.
How Long Do Solar Batteries Last?
Most solar batteries are expected to last between five and fifteen years, depending on the internal chemistry and product specifications. While every high-quality solar battery will include a performance warranty for a set amount of time (such as 10 years), the life of solar batteries can also be measured in “cycles,” in which one cycle represents the process of fully charging and discharging the device. In theory, batteries that undergo fewer ongoing cycles can be expected to last longer than those charging and discharging daily or multiple times a day.
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