A 7 kW home charger draws 32 A, and it keeps drawing it for hours. Nothing else in most homes does that: a shower or an oven pulls a heavy load for minutes, not all evening. So in a Stevenage house, the first technical question about a charger is not where it goes but whether the supply coming into the house can carry it alongside everything else.
This guide works through that question, from the fuse on the meter board to what UK Power Networks needs to know. For the rest of the job in SG1 and SG2, including where the charger goes and grants for council tenants, see our page on home EV charger installation in Stevenage.
What 32 A means on your fuse
Most homes have a 60 A, 80 A or 100 A main fuse, beside the meter. For the 1,798 privately kept plug-in vehicles DVLA counts across Stevenage borough at the end of June 2026, up from 1,158 a year earlier, the charger’s 32 A set against those fuses looks like this (our arithmetic):
| Main fuse | Charger’s share | Left for the house while it charges |
|---|---|---|
| 60 A | just over half (53%) | 28 A |
| 80 A | 40% | 48 A |
| 100 A | 32% | 68 A |
On a 100 A supply there is usually room to spare. On 60 A, an evening in a Bedwell or Chells terrace with the oven, an electric shower and the kettle on while the car charges could ask for more than the fuse allows. That is the case the next section deals with.
Load management: the usual answer
The standard solution is not a bigger supply. A current sensor clipped around the incoming supply tells the charger how much headroom is left, and the charger turns its own current down while other large loads run, then back up when they finish. The car charges a little more slowly for that hour; the main fuse never approaches its limit. It needs no work on UK Power Networks’ side of the meter, which is why it usually avoids a supply upgrade in SG1 and SG2, as elsewhere. On the published specification, the EnSmart SmartBee-M we fit is a 7 kW smart unit, and every new home chargepoint sold in Great Britain has had to be smart since 30 June 2022.
Scheduling helps too. A Stevenage charger set to run overnight, in an off-peak tariff’s cheap hours, is charging when the rest of the house is quiet.
When UK Power Networks has to be involved
Stevenage town centre sits in UK Power Networks’ Eastern Power Networks licence area, about 31 km from the nearest other network, and every new chargepoint is notified to UKPN by the installer, not by you. UKPN’s Smart Connect service, which only approved installers can use on customers’ behalf, takes EVCP forms. For a house or small business up to 69 kVA whose supply can take the new equipment, UKPN says all the installer needs to do is notify it within 28 days of installation.
Where the supply cannot take it, an application comes first, and in Stevenage there is no question which operator handles it: the town centre sits about 31 km inside Eastern Power Networks’ boundary. UKPN says it can upgrade a main fuse from 30 or 60 A to 80 or 100 A, and that where an installer has applied to connect the device, a fuse upgrade may not be needed. That is why the survey checks the fuse before anything is promised: the answer decides whether the job is a notification or an application.
Hertfordshire County Council, the highway authority for Stevenage’s roads, adds two points: the certified installer should notify the network operator and confirm the installation complies with building regulations, with a Building Regulations Completion Certificate, and you do not need to notify the highways authority.
Looped supplies in a town of terraces
In ONS’s Census 2021 figures for Stevenage’s built-up area, 44.9% of households lived in a terraced house, more than any other type. A looped supply is one service cable feeding two neighbouring homes, and where a house has one, adding a charger means re-planning the supply with both households; UKPN says that may carry a charge. Not every terrace has a looped supply, and we do not assume one. We check what feeds the meter at the survey, and if it is looped, the installer raises it with UKPN as part of the application.
Council tenants: the landlord before the fuse
Across Stevenage borough, 20.4% of households rent from the council itself (Census 2021). For them, the supply question comes second: Stevenage Borough Council has to agree as landlord before a charger is fixed to the house or its circuit is added to the consumer unit. Renters with private off-street or allocated parking can get 75% of the purchase and installation cost from OZEV, up to £500 per socket, and landlords can claim up to £500 per socket themselves. Our guide to who qualifies for the EV chargepoint grant explains each route. Grant claims must be made through an OZEV-authorised installer; tell us your situation at the quote stage.
What the survey checks
Four things, in this order: first the main fuse and, in a town where 44.9% of households live in terraces, whether the supply is shared with next door; then the consumer unit and whether it has room for a new circuit with the right protection, the earthing arrangement, and the cable route to where you park. Each appears as its own line on the quote, so a load-management sensor or a consumer unit change is visible before the day, not added on it. Our guide to EV charger installation cost shows how those items add up.
If panels are on the same supply
Solar panels and a battery go through the same supply, and each has its own network paperwork. Our guide to charging an EV from solar in Stevenage covers how the roof and the car share the day, and our page on battery storage in Stevenage covers the battery’s side. The borough’s count of privately kept plug-in vehicles rose about 55% in the year to June 2026 (our arithmetic), so more Stevenage homes are weighing a car, panels and a battery together.
Sources: UK Power Networks, main fuse upgrade and looped supply guidance; UK Power Networks, Smart Connect (https://www.ukpowernetworks.co.uk/smart-connect), read 15 October 2026; UK Power Networks Open Data, licence boundaries (town-centre point check, read 15 October 2026); Electric Vehicles (Smart Charge Points) Regulations 2021; Hertfordshire County Council, Electric vehicle charging in Hertfordshire (https://www.hertfordshire.gov.uk/services/highways-roads-and-pavements/news-and-campaigns/electric-vehicles.aspx), read 19 October 2026; ONS, Towns and cities, characteristics of built-up areas, Census 2021 (table 5c), Stevenage; ONS Census 2021 TS054 Tenure, Stevenage (Nomis); GOV.UK, Changes to electric vehicle chargepoint grant schemes from 1 April 2026 (updated 7 July 2026); DfT and DVLA, VEH0142 licensed plug-in vehicles, private keepers, Stevenage, 2026 Q2 and 2025 Q2 (published 23 September 2026); EnSmart SmartBee-M published specification, as listed by its UK distributor.