title: "Vehicle-to-Home (V2H) and Vehicle-to-Grid (V2G)" description: How bidirectional EV charging turns your electric vehicle into a mobile power source for your home and the grid. summary: How bidirectional EV charging turns your electric vehicle into a mobile power source for your home and the grid. category: electrification difficulty: Advanced updated: 2026-02-10 tags: ["V2G", "V2H", "EV", "bidirectional", "battery", "grid"] relatedTools: ["/tools/ev-charging-cost", "/tools/outage-readiness", "/tools/battery-runtime"] faqs:
- question: Which EVs support bidirectional charging? answer: "As of early 2026, vehicles with confirmed V2H/V2G capability include: Ford F-150 Lightning (V2H via Intelligent Backup Power), Hyundai Ioniq 5/6, Kia EV6/EV9, Nissan Leaf (CHAdeMO V2H in Japan, limited U.S.), GMC Hummer EV, Chevrolet Silverado EV, and the R1T/R1S platform from Rivian (V2H coming). Tesla has announced V2H support for Powerwall-equipped homes. Most other manufacturers have V2G on their roadmaps."
- question: Can V2H replace a home battery? answer: For backup power, yes — a 70–100 kWh EV battery dwarfs a typical 13.5 kWh home battery. A Ford F-150 Lightning can power an average home for 3+ days. The trade-off is that V2H only works when the car is home and plugged in. A dedicated home battery is always available.
- question: Does bidirectional charging damage the EV battery? answer: Additional charge/discharge cycles do cause some incremental degradation, but the effect is small for typical V2H use (a few additional cycles per month). Studies from the University of Warwick and others suggest that managed bidirectional charging may actually improve battery longevity by keeping the battery in optimal state-of-charge ranges more consistently.
- question: What equipment do I need for V2H? answer: You need a bidirectional-capable EV, a compatible bidirectional charger (like the Ford Charge Station Pro, Wallbox Quasar 2, or Enphase bidirectional charger), and potentially a transfer switch or smart panel to isolate your home from the grid during backup operation. Total equipment cost is typically $4,000–$8,000 beyond a standard Level 2 charger.
Vehicle-to-Home (V2H) and Vehicle-to-Grid (V2G)
The average American EV has a 60–100 kWh battery — 4 to 7 times the capacity of a typical home battery system. Bidirectional charging technology unlocks this stored energy for home backup power, grid services, and energy cost optimization.
The Concept
Conventional EV charging is one-directional: grid → charger → car battery.
Bidirectional charging adds reverse flow: car battery → charger → home (V2H) or grid (V2G).
| Mode | Flow | Purpose | |------|------|---------| | V1G (Smart Charging) | Grid → Car | Shift charging to off-peak, pause during peaks | | V2H (Vehicle-to-Home) | Car → Home | Power your home during outages or peak hours | | V2G (Vehicle-to-Grid) | Car → Grid | Export stored energy to the grid for compensation | | V2L (Vehicle-to-Load) | Car → Outlet | Power appliances directly from the car's onboard outlet |
V2H: Backup Power and Peak Shaving
How It Works
A bidirectional charger connected to your home's electrical panel can draw energy from the EV battery and supply it to household loads. During a grid outage, a transfer switch isolates your home from the grid and the EV provides backup power.
Capacity
- Ford F-150 Lightning: 98 or 131 kWh battery → powers an average home for 3–10 days depending on usage
- Kia EV9: 99.8 kWh battery → ~3–4 days of whole-home backup
- Hyundai Ioniq 5: 77.4 kWh battery → ~2–3 days
For comparison, a Tesla Powerwall (13.5 kWh) typically provides 8–12 hours of backup.
Peak Shaving
Beyond backup, V2H enables daily peak shaving: charge the EV overnight at cheap off-peak rates, then discharge to your home during expensive on-peak hours (typically 4–9 PM). This can save $30–$100/month for households on time-of-use rates.
Equipment
| Product | Max Output | Compatible EVs | Price | |---------|:-:|---|:-:| | Ford Charge Station Pro | 9.6 kW (V2H) | F-150 Lightning, future Ford EVs | ~$1,300 | | Wallbox Quasar 2 | 11.5 kW (bidirectional) | Nissan Leaf, Hyundai/Kia (CCS adapter) | ~$4,000 | | Enphase Bidirectional Charger | 19.2 kW | Multiple (NACS/CCS) | ~$5,000 | | SolarEdge V2H | 9.6 kW | Multiple | ~$4,500 |
Additional installation: $500–$2,000 for transfer switch and wiring.
V2G: Earning Money from Your EV Battery
How It Works
V2G exports stored energy from your EV battery back to the grid, typically through a utility or aggregator program. You set constraints (minimum charge level, departure time) and the system automatically charges and discharges within those parameters.
Revenue Potential
V2G revenue depends on the market and program:
| Program/Market | Potential Annual Revenue | |----------------|:-:| | Frequency regulation (PJM market) | $800–$2,000 | | Demand response events | $200–$500 | | Energy arbitrage (TOU spread) | $300–$1,200 | | Utility VPP programs | $500–$1,500 |
These are estimates based on pilot programs and market analyses. Actual V2G revenue will depend on your market, participation rates, and battery capacity.
Active V2G Programs and Pilots
- Pacific Gas & Electric + GM: V2G pilot with Chevrolet Silverado EV and Equinox EV
- UK Vehicle-to-Grid programs: Multiple active programs (OVO Energy, Octopus Energy) paying £300–£700/year — the UK is the most advanced V2G market
- Fermata Energy: V2G for fleet/commercial vehicles in the U.S.
- Nuvve: V2G aggregation platform deployed at UC San Diego and other sites
- Con Edison (NYC): V2G pilot for school buses
V2L: Vehicle-to-Load
Most modern EVs include a V2L outlet — a standard 120V or 240V outlet built into the vehicle that can power external devices without any additional equipment.
Use cases:
- Tailgating and camping (TV, mini-fridge, lights)
- Job site power tools
- Emergency backup for critical appliances
- Outdoor events
Output is typically 1.9 kW (120V) to 3.6 kW (240V) — enough for most portable appliances.
EVs with V2L: Hyundai Ioniq 5/6, Kia EV6/EV9, Ford F-150 Lightning, Rivian R1T/R1S, Genesis GV60, and more.
Battery Impact and Warranty
Degradation Concern
Additional cycling from V2H/V2G does add wear to the battery. However:
- Most EV batteries are engineered for far more capacity than needed for daily driving
- Smart V2G systems limit depth of discharge (e.g., never below 20% or above 90%)
- University of Warwick research suggests managed bidirectional cycling in optimal SOC ranges may reduce degradation compared to always charging to 100%
- Ford's warranty covers the F-150 Lightning battery for V2H use
Warranty Considerations
- Ford: Explicitly supports V2H through their Charge Station Pro; battery warranty (8 years/100,000 miles) is not voided
- Hyundai/Kia: V2L and V2H supported; V2G warranty implications vary by program
- GM: V2H supported on select vehicles; battery warranty maintained for approved use cases
- Check your specific manufacturer's warranty terms before enabling V2G
Solar + EV: The Ultimate Combo
Pairing rooftop solar with a bidirectional EV creates a surprisingly capable home energy system:
- Solar charges the EV during the day (free fuel)
- EV battery discharges to home during peak evening hours (avoiding expensive rates)
- EV provides backup power during grid outages
- Excess solar exports to the grid for net metering credits
This configuration effectively turns your EV into a 60–100 kWh home battery — without buying a separate battery system. The trade-off: the car must be home and plugged in for V2H to work.