GM Bidirectional Charging Turns Your Garage Into a Backup Power Hub

GM wants the EV in your garage to do a second job. Park it, plug it in, and the battery can move power back into a house or, through approved utility programs, back to the grid. That basic idea powers GM bidirectional charging, and it turns models such as the Chevrolet Equinox EV, GMC Sierra EV, Chevrolet Silverado EV, Buick Envista and Cadillac LYRIQ into energy assets instead of parked appliances with wheels.

The pitch sounds simple. The hardware does the hard work. Vehicle-to-Home charging, called V2H, sends electricity from a compatible GM EV into a properly equipped house during an outage. Vehicle-to-Grid charging, called V2G, sends energy from a compatible EV back to the local grid through participating utility programs.

Image

How GM Bidirectional Charging Works

A normal Level 2 charger sends alternating-current power from the house to the EV, then the vehicle converts and stores that energy in its battery pack. Bidirectional charging adds the reverse path. Specifically, GM’s system uses the GM Energy PowerShift Charger with the GM Energy V2H Enablement Kit, which includes a Home Hub, inverter, and Dark Start Battery.

That equipment controls power flow, isolates the home from public power lines, and protects utility crews during an outage. In addition, it lets the EV power household loads without backfeeding the grid when workers may need dead lines to stay dead. That safety logic separates a proper V2H installation from a risky extension-cord science project.

V2H vs V2G: Same Battery, Different Job

V2H charging works like a home backup generator, minus the gasoline can and the 2 a.m. pull-start drama. If a storm cuts power, the EV can send electricity to critical home loads such as refrigeration, lighting, internet hardware, and air conditioning, provided the system has enough stored energy and the home setup supports those circuits.

V2G technology targets the utility side. Looking at the data, the EV feeds small amounts of stored energy back to the grid during high-demand periods, such as heat waves or cold snaps. Consequently, utilities can reduce peak strain, and owners may earn credits or lower their electricity bills through approved programs.

The Hardware Specs Owners Should Know

GM’s system carries real electrical weight. The GM Energy PowerShift Charger measures 20.9 x 14.8 x 6.3 inches, or about 531 x 376 x 160 mm, and weighs 37.5 pounds. It mounts to a wall, carries a NEMA 4X rating for indoor or outdoor installation, and supports up to 44.5 miles of range per charging hour under suitable conditions.

The Home Hub measures 35.8 x 20.5 x 7.65 inches, or about 909 x 521 x 194 mm, and weighs 45.2 pounds. The inverter measures 30.7 x 20.9 x 7.5 inches, or about 780 x 531 x 191 mm, weighs 94.8 pounds, and produces up to 9.6 kW of backup power. The Dark Start Battery stays much smaller at 13.66 x 15.16 x 2.48 inches, or about 347 x 385 x 63 mm, with an 8.56-pound weight.

Compatible GM EVs

GM Energy lists several V2H-capable GM EVs for the PowerShift Charger and V2H Enablement Kit combination:

• 2027 Chevrolet Bolt EV
• 2026 Chevrolet Blazer EV
• 2026 Chevrolet Equinox EV
• 2026 Chevrolet Silverado EV
• 2026 GMC Hummer EV SUV and SUT
• 2026 GMC Sierra EV
• 2026 Cadillac CELESTIQ, VISTIQ, ESCALADE IQ, OPTIQ, and LYRIQ

Why The Silverado EV Makes The Case Loudest

The 2026 Chevrolet Silverado EV Max Range gives GM its clearest talking point because its large battery can support a properly equipped home for up to five days. That does not mean every house gets five days of full-power living with the oven, dryer, pool pump, and central air all running like nothing happened. It means battery capacity, load selection, weather, battery condition, and owner behavior control the actual result.

By comparison, the system’s 9.6 kW backup output fits essential-load planning better than unlimited whole-house use. Run the refrigerator, modem, lights, select outlets, and HVAC strategically, and the EV becomes a serious outage tool. Run every heavy circuit at once, and physics sends the invoice.

Current GM Energy Pricing

GM lists the GM Energy V2H Enablement Kit at $6,299, the GM Energy V2H Bundle at $8,098, and the GM Energy Home System starting at $15,297 during the current promotional window. Those prices cover listed GM Energy products, not installation, permits, panel upgrades, taxes, or local utility work.

From an expert perspective, installation cost will decide the real ROI for many owners. A newer 200 A electrical service with clean panel capacity may play nicely. An older panel, detached garage, long conduit run, or utility interconnection delay can add friction fast.