SolarEdge vs Tesla Powerwall: Which Battery Should I Purchase?
January 4, 2024 | Reading Time: 6 minutes
Choosing between a SolarEdge Home Battery and a Tesla Powerwall is a complex decision. Both are lithium-ion batteries that are long-lasting, dependable, and popular energy storage options amongst property owners.
There are a few key areas of comparison that can help you make an informed decision about which battery is best for your system.
The SolarEdge Home Battery is a DC-coupled battery which means it requires a compatible solar inverter, separate from the battery unit, to convert the DC solar electricity into AC household electricity one time. SolarEdge batteries are partial to new systems, so battery and inverter compatibility is ensured.
The Tesla Powerwall is an AC-coupled battery that combines the battery and inverter into one piece of equipment. While this certainly takes up less space, this conversion is less efficient. The solar panels generate DC electricity which is then converted into AC. But to be stored in the battery, the electricity must be converted back into DC and then once again converted to AC when ready for use. This extra conversion loses a small amount of electricity making the battery less efficient. The plus side of the Tesla Powerwall is they’re much easier to add to an existing solar system since you won’t need to install a new inverter that’s specific to the battery.
Performance and Specs
The SolarEdge Home Battery can hold up to 9.7 kWh of usable energy and can be set up on the floor in a floor stand or mounted to the wall. It weighs 267 pounds, and its dimensions are 31.1 in x 46.4 in x 9.84 in (W x H x D). The battery is protected from water and dust and can be installed inside or outside. Up to three batteries can be installed per inverter. The continuous power of this battery is 5 kW.
The Tesla Powerwall can hold up to 13.5 kWh of usable energy and can be set up on the floor or mounted to the wall. It weighs 251.3 pounds, and its dimensions are 45.3 in x 29.6 in x 5.75 in (W x H x D). It can be installed inside or outside. Despite this battery being slightly smaller than the SolarEdge battery, it can hold a greater energy capacity. The continuous power is 5 kW. Without the need for a separate inverter, the only restriction on the number of batteries is the electrical panel service capacity.
Maintenance and Service
Both batteries are known to require minimal maintenance throughout their lifespan. If service is needed, SolarEdge’s customer service is rated higher than Tesla’s as you’ll likely experience a longer response time when working with Tesla’s customer service team.
Isaksen Solar Insight: We have installed thousands of both batteries and I’ve had virtually no maintenance calls. That’s a good fact.
Pricing and Incentives
The Tesla Powerwall is typically cheaper than the SolarEdge Home Battery. It is also made in America, qualifying it for the American-made 10% tax credit as affirmed by the Inflation Reduction Act of 2022, saving you even more money.
The SolarEdge Home Battery is typically more expensive than the Tesla Powerwall. Since it is internationally made, it does not qualify for the 10% tax credit.
Lifespan and Warranty
The lifespan of batteries can range from five to 15 years. This means you’ll likely need to replace them within your solar system’s 25-year lifespan. Factors that determine the lifespan of your batteries include how often you use the batteries, the type of battery you install, and the environment where the battery is stored.
Both the SolarEdge Home Battery and the Tesla Powerwall are backed by a 10-year warranty. SolarEdge’s warranty is very straightforward; you’re guaranteed at least 70% of the battery’s initial capacity after 10 years. Tesla’s warranty offers different terms depending on the application used. With the “solar self-consumption / backup only” application, you’re guaranteed your battery maintains a minimum capacity of 70% after 10 years of usage. For all other applications, the battery’s capacity will gradually decrease to 70% either after 10 years of usage or upon releasing 37.8 megawatt-hours.
Is the SolarEdge Home Battery or the Tesla Powerwall Better?
Based on your system’s specific needs, you can determine which battery is a better fit. Ultimately, the SolarEdge Home Battery and the Tesla Powerwall are both top-tier solar products that will store your energy efficiently, ensure a power source in the case of an emergency, and last a long time.