Tesla Powerwall 3 is disrupting the solar inverter market

New data suggests that the Tesla Powerwall 3 is significantly disrupting the US solar inverter market.

The home battery pack’s integrated inverter is changing the game.

Tesla acquired its solar business when it bought SolarCity in a controversial deal due to Musk being a large shareholder of both Tesla and SolarCity, and Musk’s cousin led the latter.

The automaker kept the SolarCity operations going for a few years. In fact, it continued until after Tesla shareholders sued Musk over the acquisition, and Musk defended himself by claiming that SolarCity had become an integral part of Tesla.

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Shortly after he won the lawsuit, Tesla virtually stopped all operations that came from its SolarCity acquisition, which primarily consisted of residential solar financing and installations.

Tesla even stopped reporting solar deployment. The company’s energy business now consists almost entirely of Powerwall and Megapack deployments.

However, the launch of the Powerwall 3 has indirectly brought Tesla back into the solar business, as the home battery pack features an inverter that works for both solar and storage applications.

EnergySage is a company that matches solar installers with potential buyers, and as a result, it has a wealth of interesting data about the solar industry in the US. Today, it released its Spring 2025 Marketplace report.

In the report, EnergySage revealed that Tesla became the second-most quoted inverter brand in the second half of last year:

Tesla became the most quoted battery brand in H2 2024, occupying 63% of Marketplace share nationwide. Because the Powerwall 3 includes an integrated inverter, Tesla also became the second-most quoted inverter brand. With batteries increasingly being added to solar systems—the national battery attachment rate jumped to 45% in H2 2024, an all-time high—Tesla’s growth was a key driver of the low storage and solar prices seen on EnergySage. In 2025, we are examining whether brand backlash and equipment shortages will affect Tesla’s Marketplace share.

This is also a byproduct of the increased popularity of energy storage systems when deploying new solar systems.

In big solar markets like California and Texas, the majority of residential solar quotes are attached to batteries, and Tesla is not the top quoted brand, thanks to Powerwall 3:

Powerwall was already the preferred home battery pack for many homeowners, and the fact that it now includes a solar inverter has made it even more attractive, as most home energy storage systems in the US are being deployed along with rooftop solar.

The Powerwall 3’s solar inverter integration is pushing solar plus storage costs down quite a bit.

The popularity of the Powerwall 3 has particularly hurt Enphase, a leader in solar inverter. It had 73% of the US market in 2022, and now it is down to 53%.

Despite Tesla driving prices down, Powerwall 3 is not the cheapest battery pack available. Panasonic and EG4 batteries were both priced lower on a per kWh basis than Tesla’s in the second half of 2024, but Tesla won on cost when also replacing the solar inverter.

However, it’s not all good news from Tesla. EnergySage also recently reported an increase in customers requesting alternatives to Powerwalls in 2025, partly due to Elon Musk’s increasing controversy.

If you’re interested in installing solar panels and/or batteries for your home, we recommend using EnergySage. You will be able to get quotes without any hassle and only talk to someone when you are ready to move forward. Within minutes, you can get on the path to producing your own power with solar and battery storage, including with Powerwall.