Exploring the best Tesla Powerwall alternatives in 2021
Individual panel prices
Prices of DIY kits
Installed system prices
Every year, more and more homeowners choose to pair solar panels with solar batteries - and for good reason. Solar batteries continue to get cheaper year after year, and with widespread power blackouts becoming more common, people want to make sure they have access to reliable electricity.
For years, the Tesla Powerwall has been the solar battery of choice for most homeowners. But the company’s recent decision to only sell Powerwalls with Tesla solar systems makes it difficult to get your hands on one.
So, if you’re looking for a solar battery and you already have solar panels, or you aren’t quite sold on getting a Tesla solar system, you’re going to need some Tesla Powerwall alternatives.
To help make your search a little easier, we’ve collected some of the leaders in solar energy batteries and analyzed how they stack up against each other. In this blog, we will review the sonnen Eco, LG Chem, Panasonic EverVolt, Electriq PowerPod, and BYD B-Box solar batteries - and how they compare to the Tesla Powerwall.
Your average monthly bill
Since the release of the first Powerwall in 2015, Elon Musk’s company Tesla has aimed to produce larger capacity, more reliable, and more cost-effective energy storage solutions. The current Powerwall+ comes with a 13.5 kWh usable capacity and is the most widely-installed battery backup for home use.
The Tesla Powerwall costs $10,500 for the battery, installed as part of a Tesla solar+storage system.
Remember - the Tesla Powerwall can only be installed alongside new Tesla solar panels or the Tesla solar roof. Tesla no longer sells the Powerwall apart from new installations with solar panels.
So, if you can’t get the Powerwall, what batteries can you get?
German energy company sonnen has long focused its efforts on the production of solar batteries. Since 2017, sonnen has marketed its batteries in the United States through a network of installers.
The company previously only offered luxury solar battery solutions that exceeded the budget of most homeowners. In 2020, sonnen decided to take a stab at the mainstream residential market with the release of their newest battery, the sonnenCore.
The all-in-one sonnenCore battery storage system is a 10 kWh lithium iron phosphate battery that costs $9,500 before installation. This is substantially cheaper than their sonnenEco or EcoLinx models that could cost over $30,000 to install.
The sonnenCore battery melds together solar energy with features befitting even the most technologically advanced smart home, while still keeping it at a reasonable price.
Because of the company’s commitment to advancing technologies, the battery has many useful features that should be considered when looking at battery backup systems.
Some features of the sonnenCore solar battery include:
The sonnenCore battery is best for homeowners looking for advanced features like Time-of-Use load shifting and those who are interested in being able to track and control where their power is going. It’s also ideal for homeowners who expect to discharge their battery regularly, as it has one of the best warranties and throughput guarantees.
The sonnenCore can also bring you peace of mind, as its chemistry makes it safer and easy to recycle.
The LG Chem RESU battery is a lithium-ion battery that captures solar energy and stores it for later use in residential settings. In 2021, LG Chem introduced new higher-capacity RESU Prime batteries in order to answer the needs of the marketplace affected by power outages and to more directly compete with Tesla.
The LG Chem RESU Prime can be used as either whole-home backup during outages or as a day-to-day battery pack, meaning it charges and discharges over a traditional 24-hour period. The RESU Prime comes in capacities of 10 and 16 kWh, and can be installed in pairs to create whole-home backup for even larger homes that use a lot of electricity.
So instead, these batteries are best for energy-conscious homes that require energy coverage during peak consumption periods and unexpected power outages. The 16 kWh system is enough to cover a home for about a day of limited energy use, not several days.
Panasonic is one of the most recognized and trusted electronics brands in the world, and its solar and battery offerings match the company’s reputation.
Panasonic makes some of the most efficient solar panels on the market, and they’ve been designed to pair seamlessly with the EverVolt battery system. You can also buy the batteries separately and install them with or without solar panels.
If installed as an AC-coupled system (connected to your home’s wiring), Panasonic offers two battery sizes of 11.4 and 17.1 kWh. If installed DC-coupled (connected to your solar inverter), the battery system is expandable from 11-102 kWh for a truly huge whole-home backup system.
Electriq Power is a newer company that started in a California garage in 2014. The company has grown quickly since those early days, and it now offers the PowerPod 2 solar battery for homeowners looking for some backup power and load-shifting to prevent high peak power charges under Time-of-Use billing.
The PowerPod 2 comes in both AC and DC-coupled versions in sizes of between 10 and 20-kWh.
BYD is a large Chinese company headquartered in Shenzhen. Despite the company’s massive size in the Asian market, they’re a relatively unknown brand outside of China and surrounding countries. While they are working on their international brand recognition, they are not likely to outpace their competitors anytime soon.
Their B-Box solar batteries, however, do the job just fine in most residential setups. The company provides the supporting hardware which can hold up to four 2.5kW battery packs. This means the BYD is available in four different sizes: 2.56kWh, 5.12kWh, 7.68kwh and 10.24kWh. The supporting hardware costs $675.28 and each battery costs $1,548.91, not including installation costs.
BYD, as a lesser known company, has big shoes to fill if it wishes to break into the solar markets in the United States and other countries. However, the B-Box has some great features that may make it the best option for your solar power setup:
The BYD B-Box might be small in terms of storage capacity, but it is mighty in power output. The large size of the device (roughly the size of a small refrigerator) makes it obtrusive, so the battery pack is best-suited for homes that have an easy way to hide the device. Its limited storage capacity and limited optimal temperature range means that it only makes sense for small homes that are in temperate climates.
The battery that will actually work best for your home will largely depend on your budget, your location, your personal energy consumption profile, and what additional features you’d like to see in your system.
We think the LG Chem battery is the best Tesla Powerwall alternative. It uses time-tested technology and is now on its third generation. It can be easily paired with many different kinds of existing string-inverter solar panel systems or can be integrated with a new installation. Plus, the LG Chem is already widely available.
The batteries from Panasonic and Electriq Power are fine products in their own rights, but generally a bit more expensive and harder to get. That said, if you find a Panasonic-certified installer, you can get both panels and batteries that are perfect for each other. If you want something with more impressive specs, then you may want to go with a sonnen battery. But it’s a luxury battery that comes at a luxury price.
Whether you’re shopping around for solar panels or a battery backup, it is best to speak with a qualified installer to better understand your options. We also suggest you check out the solar panel cost estimator to better understand how solar energy can work for your specific home.
The factors you need to consider when shopping for a home solar battery, including price, power rating, lifespan, safety rating, and more.
Global sustainability requires each country to work together to manage resources so that we, future generations, and the environment can thrive.
Today, SolarReviews, the leading American consumer reviews website for solar panel installation, released the Solar Powered Electric Vehicles Consumer Guide.