V2G + Solar + Fleet EV — Integrated Energy Systems for FE Colleges
How FE colleges integrate Vehicle-to-Grid (V2G) bidirectional EV charging with on-campus solar and battery storage for revenue and resilience.
Vehicle-to-Grid (V2G) bidirectional EV charging is moving from pilot to commercial deployment in UK 2026. For FE colleges with on-campus solar and growing fleet EV transition, V2G represents a meaningful additional value stream — the EV fleet becomes additional battery capacity for the campus.
What V2G is
V2G is bidirectional EV charging that allows electricity to flow both directions — from grid to vehicle for charging, and from vehicle to grid (or building) for discharge. Standard EV chargers are unidirectional; V2G chargers cost typically 2-3x more (around £6,000-£12,000 per unit) but enable several use cases:
- Vehicle-to-Building (V2B): EV battery discharges into the building’s electrical system during peak demand windows, reducing grid imports
- Vehicle-to-Grid (V2G): EV battery discharges to the public grid during system-stress events (Demand Flexibility Service, Capacity Market participation), generating revenue
- Solar absorption: EV battery charges from excess solar during daytime windows when building demand is below PV generation, reducing low-value export and increasing self-consumption
For an FE college with on-campus solar, all three use cases combine into a single integrated energy system.
The use case for FE
FE colleges have unusual fleet characteristics that suit V2G:
- Staff fleet vehicles parked all day — leadership cars, estates team vans, training vehicles. Vehicles are stationary at the campus 8-10 hours daily during peak solar hours.
- Student commuter vehicles parked all day — particularly Year 13 / FE adult learners with regular attendance. Same parking pattern as staff.
- Apprentice training vehicles — for T-Level Motor Vehicle, electrical installation training. Specifically used as training assets — connecting them to V2G is itself curriculum content.
A typical FE college with 4-6 V2G chargers and 8-12 V2G-capable vehicles plugged in across the day delivers 200-400 kWh of additional flexible battery capacity — substantial in addition to fixed battery storage.
The economics
V2G economics in 2026 combine three revenue/saving streams:
- Avoided grid import — discharging into the building during 4-7pm peak windows reduces grid imports at 25-30p/kWh peak tariff. Typical saving £8-15 per V2G charger per day during heating-season weekdays.
- Demand Flexibility Service (DFS) revenue — National Grid ESO pays for confirmed demand reduction during grid stress events. V2G participation can deliver £8-25 per event per charger.
- Capacity Market revenue — annual commitment-based payments for confirmed flexibility availability. Typically £30-60 per charger per year.
- Solar self-consumption uplift — V2G charging from solar during midday absorption windows lifts overall PV self-consumption by 8-15 percentage points.
Combined economic benefit per V2G charger: typically £400-£1,200 per year. Payback on the V2G charger incremental cost (£4,000-£8,000 above standard EV charger): 4-8 years.
Integration with existing solar + battery
For FE colleges with existing on-campus solar and battery storage, V2G integration typically requires:
- EV management platform — schedules charging from solar when available, switches to V2G discharge during peak windows or grid events. Cloud platforms from companies like Octopus Energy, Solo, and Wallbox handle this.
- Building energy management integration — V2G discharge needs to coordinate with battery state of charge, building demand profile, and grid tariff signals.
- Site DNO export agreement — V2G discharge is technically grid export; needs G98/G99 compliance and SEG-licensed off-take or behind-the-meter consumption verification.
The G99 application for V2G is typically simpler than for solar (smaller per-unit kW), but coordination is essential.
Funding routes
V2G charger costs sit alongside standard EV charger costs and can be folded into the same funding stack:
- OZEV grants (where current) cover a portion of EV charger costs including V2G in some rounds
- Salix Decarbonisation Loan can include V2G chargers as part of an integrated solar + battery + charging programme
- PSDS Phase 4 has accepted V2G as part of bundled bids where the integrated system delivers measurable carbon benefit
- MCA decarbonisation grants in Greater Manchester, West Midlands, London have specifically funded V2G pilots in public-sector estate
For an FE college already running a solar + battery programme, adding V2G is typically a 15-25% incremental cost on the EV charging element.
Curriculum integration
V2G is exceptional curriculum content for:
- T-Level Building Services Engineering — bidirectional inverter design, grid synchronisation, protection coordination
- T-Level Motor Vehicle — high-voltage EV systems, battery management, integration with stationary storage
- T-Level Electrical Installation — DC and AC system integration, isolation procedures, protection
- T-Level Engineering — modelling and control systems
Several FE colleges with V2G installs run synoptic projects on V2G economics, control system design, or integration challenges — making the asset a teaching resource alongside its operational role.
Practical first-step
For FE colleges already running solar projects in 2026, a low-risk V2G entry is:
- One V2G charger alongside 4-8 standard EV chargers in the initial install
- One V2G-capable lease vehicle (Nissan LEAF e+, Hyundai IONIQ 5, Polestar 2, and selected commercial vehicles are V2G-ready)
- One contract with a V2G management platform for the pilot
- 12-month evaluation before scaling to full V2G fleet
Total incremental cost: typically £8,000-£12,000 over a standard EV charging install. Pilot generates real data for the corporation board on V2G economics in your specific use pattern.