At a Beverly Hills mansion, where an electric truck is your only source of power

Last week, General Motors summoned a small group of journalists to a Beverly Hills mansion to witness the future of home energy. And it started with a preemptive blackout. 

As sunset fell across the Hollywood Hills, the chief engineer from General Motors flipped a breaker and disconnected the five-bedroom home from the grid. The lights went out, and less than 20 seconds later, GM’s home system powered it back up, pulling just 5kW or less from the fully charged Chevy Silverado EV parked in the garage.  

When the lights came back on, the small crowd of journalists and GM Energy employees clapped, as if they were experiencing electricity for the first time.

While a pickup truck may be an unusual site in the tony neighborhood, the company wanted to show off how its new energy subsidiary, GM Energy, can power an entire home using nothing but the Silverado as a mobile generator. GM wanted to demonstrate the new features of its vehicle-to-home (V2H) energy products at a splashy if mostly sterile mansion in the excessively wealthy Los Angeles enclave.

Using GM Energy’s equipment, the 10,000-square-foot mansion ran exclusively on battery power from the fully charged 215kWh Ultium battery pack underpinning the new Silverado EV for a few hours on a Thursday evening for the event. 

But one couldn’t help but be struck by some of the cognitive dissonance on display. Amid cooling demand and flagging sales for EVs, automakers like GM are increasingly trying to market their plug-in cars as something like a Swiss Army knife for the electrical grid. The aim is to entice consumers into spending more on an EV to get access to all these extra features unavailable to anyone driving a car that runs on fossil fuels.  

The home ran off the Silverado EV for the rest of the night, powering more than 50 overhead lights inside, music throughout, the kitchen where a full chef’s staff continued to turn out hot hors-d’oeuvres for guests, and exterior lighting that ran all the way down the 200-foot long driveway. 

While EV technology opens up a number of new and innovative benefits for the consumer, and there are plenty of benefits to creating V2H systems for EVs, the clean energy market has put up somewhat mixed financial results in recent months. Still, GM remains bullish and barreling ahead with a team hired from private equity, climate tech, and more. 

“This is truly unlocking the potential of GM’s electric vehicle lineup,” said Wade Sheffer, VP of GM Energy. “Having that technology, in that garage, prepared to do what it’s doing right now, raises this property’s valuation even more.”

“If you put one of these GM Home systems in every single customer’s home, you can create a decentralized grid,” added William Hotchkiss, head of safety and supplier quality, purchasing, and supply chain. “You can start to make it a connected network so that you can manage demand, and everyone will have more reliability.” 

GM launched GM Energy in 2022 as a way to compete in the growing home energy market and has plans to sell additional equipment, including the Power Bank or stationary home battery system. 

Yet, in an era when EV sales have not grown as quickly as many automakers had anticipated, questions remain about whether it makes good business sense to get into home energy. The market isn’t small, but it’s not exactly growing, with current estimates putting its worth at around $150 billion. 

Other automakers have also sensed an opportunity. Tesla touted its energy business, which includes home chargers, stationary batteries, and solar panels, as a bright spot during last month’s earnings call. The company recently announced that it would start rolling out bidirectional charging in 2025. In the home battery and solar installation market, Tesla dominates.

Hyundai offers its own home energy integration, which includes solar panels and battery storage, alongside its EVs like the Ioniq 5 and 6, which have bidirectional charging. But the automaker has said it’s more focused on vehicle-to-grid power over vehicle-to-home.

GM is taking a similar approach and partnering with Qmerit to help homeowners install their GM Energy technology. The company says that its new “holistic” home system will “help accelerate EV adoption. 

As Sheffer put it during our interview, “General Motors simply believes we’re going to have mass adoption of EVs, and we’re going to invest in the whole ecosystem. We’re a separate company within the company, so General Motors invested in us to deliver all of the pieces of that possible.”

While the Silverado EV is the only current vehicle that has this V2H ability, eventually GM’s other electric vehicles, including the GMC Sierra EV Denali, Chevy Equinox and Blazer EVs, and Cadillac Lyriq, will get it, too, either via an over-the-air or dealer-installed update. 

While these features are similar to those already offered on the Ford F-150 Lightning, GM is promising to make it more accessible to the masses. Its plan is to transform its complete lineup of EVs to enable V2H capabilities. But at launch, there are no plans to open the system up to third parties.  

For example, the GM Home kit is currently not compatible with other EVs, including the Honda Prologue, which also gets GM’s Ultium battery. According to executives at last week’s event, there are no current plans to change that until ISO standards change. 

“Right now, GM Energy offers the most comprehensive home charge ecosystem on the market, bar none,” Sheffer said. “Once we had the power bank and connection to solar, stop the tires.”

Hotchkiss and Sheffer also confirmed that there are no current plans for GM to get into the solar panel manufacturing or installing business right now, given how fraught the space can be. (The company previously said it would work with third-party solar providers, like Sun Power.) Plans to allow customers to sell excess energy back to the grid are still in the works, according to Sheffer, noting that GM is currently piloting some smaller programs with utilities across the nation. 

As the world heats up and climate change stretches the electrical grid closer to its limits, consumers are increasingly looking for ways to ensure they still have access to reliable power. Since EVs spend the majority of their time parked in home garages and plugged in, GM sees an opportunity to leverage those parked EVs for power storage. The demonstration last week shows what that might look like.

It also turns out that consumers want these kinds of features from their EVs, at least according to a recent study by JD Power. The study found that over a third of EV owners said they were interested in bidirectional charging as a way to make money by selling power back to the grid and to help balance peak electrical demands. 

While it’s still very early days for GM Energy and its suite of new features supporting V2H support, executives are positive about the future of the venture. “GM is an automobile company, pulling from the grid. It only makes sense that we have the whole ecosystem,” Sheffer said. “That’s why GM said we’re going to pioneer this. If we don’t start, nobody is ever going to get there. So here we go.” 

This was no temporary solution, either. GM executives promised that the mansion could run for three to four days at that level of consumption before fully depleting the battery. When I left at around 9:30PM, the charge on the Silverado EV had only dropped by 1 percent.