More than 100,000 home batteries across California stepped up as a virtual power plant last week in a scheduled test event, and the results were impressive, according to new analysis from The Brattle Group.

Sunrun was the largest aggregator, Tesla was the largest OEM, and most of the batteries were enrolled
in California’s Demand-Side Grid Support (DSGS) program.

Sunrun’s distributed battery fleet delivered more than two-thirds of the energy during a scheduled two-hour grid support test on July 29. In total, the event pumped an average of 535 megawatts (MW) onto the grid – enough to power over half of San Francisco.

The event, run between 7 and 9 pm, was coordinated by the California Energy Commission, CAISO (California Independent System Operator), and utilities to prepare for stress on the grid during August and September heat waves. And it worked.

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Sunrun alone averaged over 360 MW during the two-hour window. The batteries kicked in right when electricity demand typically spikes in the evening, acting just like a traditional power plant, but from people’s homes.

Brattle’s analysis found that the battery output made a visible dent in statewide grid load, when the power is needed most. “Performance was consistent across the event, without major fluctuations or any attrition,” said Ryan Hledik, a principal at The Brattle Group. He called it “dependable, planning-grade performance at scale.”

Residential batteries, Hledik explained, don’t just help shave off demand during critical hours; they can reduce the need for new power plants entirely. “They can serve CAISO’s net peak, reduce the need to invest in new generation capacity, and relieve strain on the system associated with the evening load ramp,” he said.

This isn’t a one-off. Sunrun’s fleet already helped drop peak demand earlier this summer, delivering 325 MW during a similar event on June 24. The company compensates customers up to $150 per battery per season for participating.

Sunrun CEO Mary Powell summed it up: “Distributed home batteries are a powerful and flexible resource that reliably delivers power to the grid at a moment’s notice, benefiting all households by preventing blackouts, alleviating peak demand, and reducing extreme price spikes.”

Read more: The US’s largest virtual power plant now runs on 75,000 home batteries

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Hyundai’s new Elexio electric SUV, which is built in China, could be sold in overseas markets. The CEO of Hyundai Australia calls it “a promising vehicle” that could help the company regain market share from Tesla, BYD, and others.

Will Hyundai’s new Elexio SUV be sold overseas?

The Elexio SUV is the first dedicated electric vehicle from Hyundai’s joint venture with BAIC in China, Beijing Hyundai.

After unveiling it for the first time in May, Hyundai is preparing to launch the new Elexio in China in the next few weeks.

According to a new report, Hyundai’s new electric SUV could be sold in overseas markets, including Australia. Don Romano, the CEO of Hyundai Australia, told journalists (via EV Central) last week during the launch event for the new IONIQ 9 that the company has done a “terrible job” with its EVs so far.

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“And the only explanation for that is that we haven’t put enough focus into it,” he explained. However, Romano promises the automaker will do better.

Hyundai plans to boost marketing and support its dealership network, which only began selling IONIQ EV models a little over a year ago.

In what mostly went under the radar, Romano also suggested the new Elexio SUV could arrive in Australia. “It’s under evaluation now,” he said, adding, “it’s definitely a promising vehicle.”

Despite this, it may have a few hurdles to clear. Hyundai’s Australian boss explained, “I still have work to do to ensure that it’s the right vehicle in the right segment at the right price for our market. And I have not reached that level yet.”

Romano told journalists that a final decision needs to be made “in the next 60 to 90 days,” and to check back in three months when he will have a definitive answer.

Hyundai Australia is also looking to launch the IONIQ 2, a smaller, more affordable EV to sit between the Inster EV and Kona Electric.

Romano said, “It’s a potential opportunity,” but didn’t provide any details. He said, at this point, he’s just glad Hyundai is producing it. “Now I just need to get the details and find out, will it fit into our overall product plan and create enough demand to where it becomes a viable option for us? So my initial thought is absolutely. Yep.” Hyundai Australia’s boss told journalists.

The new EVs would help Hyundai, which has been struggling to keep pace in the transition to electric, compete in Australia and other overseas markets.

As of June 2025, Hyundai has sold only 853 EVs in Australia. In comparison, Tesla has sold 14,146 electric vehicles, and BYD has sold over 8,300. Even Kia is selling more EVs in Australia, with 4,402 units sold in the first six months of the year.

Measuring 4,615 mm in length, 1,875 mm in width, and 1,673 mm in height, Hyundai’s electric SUV is slightly smaller than the Tesla Model Y.

It recently underwent three consecutive crash tests among several other global evaluations, consistently outperforming benchmarks. Based on Hyundai’s E-GMP platform that powers nearly all Hyundai and Kia EVs, the Elexio has a CLTC driving range of up to 435 miles (700 km)

Hyundai is set to launch it in China in the third quarter of 2025. Prices have yet to be announced, but it’s expected to start at around 140,000 yuan ($19,500).