Before worrying about your DNO, it is worth clarifying which technology you are actually installing. Vehicle-to-home (V2H) — where your EV’s battery powers your house without sending electricity back to the public grid — generally does not need DNO permission at all. Vehicle-to-grid (V2G) — where your EV exports energy to the local network — is where DNO approval matters, and where the regional picture varies.
Most people searching “DNO V2H permission” are actually concerned about V2G. The confusion is understandable: both use a bidirectional charger, both involve your EV doing something unusual with electricity, and both are new enough that many installers themselves are still learning the regulatory requirements. This guide separates the two, covers every UK DNO region, and tells you what to expect in your area.
Key Takeaways
- V2H (home use only) generally does not need DNO approval — only V2G (grid export) requires G99
- The UK has six DNO groups covering 14 licensed regions — check energynetworks.org to find yours
- UKPN (South East, East Anglia, London) automatically approves around 80% of V2G applications within seconds
- Northern Powergrid can fast-track straightforward G99 applications in a single working day
- Constrained rural networks may limit or block V2G export under G100 — V2H sidesteps this issue entirely
V2H vs V2G: which actually needs DNO permission?
This is the most important clarification in this guide.
| Technology | Exports to grid? | DNO approval needed? | Regulation |
|---|---|---|---|
| V2H (powers your home only) | No | Generally no | — |
| V2G (exports to public grid), ≤3.68kW | Yes | G98 notification | Simpler process |
| V2G (exports to public grid), >3.68kW | Yes | Yes — full G99 | Engineering assessment |
V2H energy stays entirely within your property boundary. Your Distribution Network Operator has no interest in — and no jurisdiction over — electricity that never reaches the public network. Installing a bidirectional charger for V2H use is, from the DNO’s perspective, similar to installing any other high-power home appliance.
V2G is different. The moment you send electricity back to the distribution network, you are using shared infrastructure. The DNO needs to know that your installation is technically sound and that the local grid has capacity to absorb your export. That is what G99 assesses.
One nuance: some DNOs may still want informal notification of a bidirectional charger installation even for V2H-only use. Check with your installer — they should know your DNO’s current position.
For V2G export, any system above 3.68kW (16 amps per phase on a single-phase supply) triggers the full G99 process. Most bidirectional chargers — NexBlue Point 2 at 7.4kW, Zaptec Go 2 at 7.4–22kW, Wallbox Quasar 2 at 11.5kW — are all well above this threshold. If you intend V2G use, you will need G99.
For a full explanation of the DNO approval process, see our guide to DNO approval for EV chargers.
The six UK DNO groups and their regions
The UK electricity distribution network is divided into 14 licensed areas, operated by six main company groups. Find yours at energynetworks.org or check your electricity bill.
| DNO group | Operating company name | Region covered |
|---|---|---|
| UK Power Networks (UKPN) | UK Power Networks | South East England, East Anglia, London |
| National Grid | National Grid (formerly Western Power Distribution) | Midlands, South West England, South Wales |
| Northern Powergrid | Northern Powergrid | North East England, Yorkshire |
| SP Energy Networks | SP Manweb / SP Distribution | Merseyside, North Wales / Southern Scotland |
| SSE / SSEN | Scottish Hydro / Southern Electric | Northern Scotland, parts of South East England |
| Electricity North West | Electricity North West | North West England (Cumbria, Lancashire, Greater Manchester) |
The boundaries are not always intuitive — for example, some parts of South East England are served by SSE rather than UKPN. Use the ENA’s postcode lookup tool to confirm your area.
UKPN — fastest region for V2G approval
UK Power Networks has moved further than any other UK DNO in streamlining V2G connections. UKPN was the first DNO to enable automatic approval for V2G-enabled EV chargers, treating them like other low-carbon technologies it already connects automatically.
Figures vary — verify current UKPN policy at the time of your application, but as of 2026:
- Approximately 80% of V2G applications are approved automatically within seconds
- The condition is that your charger must be type-tested by the Energy Networks Association and meet UKPN’s network requirements
- The remaining 20% go through the standard G99 assessment process (45–65 working days)
If you are in South East England, East Anglia, or London, and your bidirectional charger holds ENA type-testing approval, your V2G application is likely to be one of the fastest in the country.
Once you know your DNO is on board, the next step is the right vehicle. See our guide to V2H-compatible cars to check your EV before committing to hardware.
Other regions — what to expect
Northern Powergrid (North East England, Yorkshire)
Northern Powergrid has developed a fast-track G99 process that can complete in a single working day for straightforward, low-impact connections. Figures vary — verify current Northern Powergrid timescales at the time of your application. Standard G99 applications take around 45 working days. Rural areas in Yorkshire and the North East may face network constraints — check the DNO’s capacity map before committing to V2G hardware.
National Grid (Midlands, South West, South Wales)
National Grid — which took over from Western Power Distribution in 2023 — operates the standard G99 process across a large and geographically diverse area. Timescales of 45–65 working days apply. Rural areas in the South West and Wales are more likely to face constrained network conditions and potential G100 export limitations. Use the National Grid connections portal to initiate a pre-application capacity check.
SP Energy Networks (Merseyside, North Wales, Southern Scotland)
SP Manweb covers Merseyside and North Wales; SP Distribution covers Southern Scotland. Both operate standard G99 processes. Southern Scotland has significant areas of rural and remote network, where constrained conditions are more likely. Contact SP Energy Networks directly via their connections portal — timescales broadly match the 45–65 working day standard.
SSE / SSEN (Northern Scotland, some South East England)
Scottish Hydro Electric Power Distribution covers Northern Scotland — one of the most geographically challenging distribution areas in the UK. Highlands and Islands locations are particularly susceptible to network constraints. If you are in a remote Highland or island location, contact SSEN early and ask explicitly about V2G capacity before investing in hardware. V2H remains available without G99 regardless of network constraints.
Electricity North West (North West England)
Electricity North West covers Cumbria, Lancashire, and Greater Manchester. The urban areas (Manchester, Preston) have more robust infrastructure; rural Cumbrian areas may face constraints. Standard G99 process applies — allow 45–65 working days.
What “constrained network” means for V2G
A constrained network is one where the local grid infrastructure cannot safely absorb additional power export without risk of voltage rise or instability. When your DNO identifies this, they use G100 to limit rather than fully refuse your connection.
G100 export limitation does not mean you cannot install a bidirectional charger. It means your V2G export is capped at a set level — sometimes a very low level, sometimes zero — during periods of peak network load. The bidirectional hardware still works for V2H use regardless of G100 restrictions.
Constrained conditions are more common in:
- Remote rural areas with older distribution infrastructure
- Locations with high existing solar penetration on the local network
- Older suburban residential networks with limited transformer capacity
If G99 is refused outright, your options are: accept G100 export limitation; apply for a flexible connection that accepts curtailment during peaks; fund grid reinforcement (rarely practical for a domestic installation); or switch to V2H use only, which removes the grid export question entirely.
How to find out if your area is constrained
Three steps before committing to V2G hardware:
-
Find your DNO at energynetworks.org or on your electricity bill — you need to know which organisation to approach.
-
Check your DNO’s network capacity map — most DNOs publish interactive maps showing which areas have available capacity and which are constrained. These are updated periodically and give a reasonable early indication.
-
Ask your installer for a pre-application check — most DNOs offer this free of charge, and it gives you an engineering-level indication of whether your specific location can support V2G export before you spend money on hardware.
Once you know your DNO’s position, choose the right V2H car and charger for your situation — explore our guide to V2H-compatible cars.
Frequently Asked Questions
Do I need my DNO’s permission to install a V2H charger?
For V2H use — powering your home only, with no export to the grid — DNO permission is generally not required. However, for V2G, a G99 application to your DNO is mandatory for any system exporting more than 3.68kW. Always confirm with your installer, as some DNOs request notification even for V2H-only setups.
Which UK DNO is easiest for V2G approval?
UK Power Networks, covering South East England, East Anglia, and London, is currently the most streamlined DNO for V2G. It automatically approves around 80% of V2G applications in seconds for ENA type-tested chargers. Northern Powergrid can also fast-track applications in a single day for straightforward connections. Figures vary — verify current policies with each DNO.
What happens if my DNO refuses V2G export?
If your DNO refuses V2G export due to a constrained network, you have several options: accept a G100 export limitation that caps rather than bans export; apply for a flexible connection with curtailment during peaks; fund grid reinforcement (rarely practical for domestic use); or switch to V2H use only, which removes the need for DNO approval entirely. Your bidirectional charger hardware remains usable for V2H regardless of the V2G decision.