Guides
Practical guides for electrical installers, landlords and property managers adding EV chargers to existing supplies.
Looped supply and an EV charger: what installers should check
How looped (shared) services affect EV charger installs, what the DNO decides, typical unlooping timelines, and what you can do while you wait.
Read the guide →7 kW EV charger on a 60 A supply with storage heaters
Worked example: fitting a 7 kW charger to a 60 A single-phase supply with 8 kW of storage and water heating, using load management, and what to tell the DNO.
Read the guide →EV chargers on a 100 A three-phase commercial supply
How many EV chargers fit on a 100 A three-phase site? Per-phase headroom, G100 load management and the DNO application, with a worked office example.
Read the guide →Heat pump and EV charger on one supply: will both fit?
How to add up a heat pump and an EV charger on one single-phase supply, why the coldest day matters, when it becomes a DNO application, and where G100 load management fits in.
Read the guide →Do I need to tell the DNO about my EV charger?
Yes, every EV charger goes to the DNO. The real question is whether you notify after installing or apply first. Here is how to see which route your site is on.
Read the guide →How to find your main fuse rating (safely)
Where to find the main fuse rating on your cut-out, why the carrier label isn't always the fuse inside, and how your DNO can confirm it.
Read the guide →Can I add a home battery with my EV charger?
Why a battery or solar panels count as generation, why G98 or G99 applies on top of the charger, and how a battery charging from the grid adds to demand.
Read the guide →EV chargers for tenants in flats and HMOs: a landlord's guide
Which supply tenant chargers run from, how to add up demand per phase, and when the DNO needs to approve the job before installing.
Read the guide →
Check the headroom on your supply
Enter the fuse rating, the existing peak demand and the equipment you plan to add for an instant green, amber or red result.
Run the free check