Battery storage in West Wickham

West Wickham at a glance

What storage does in a mostly gas-heated ward

Roughly six households in every seven in West Wickham ward heated their homes with mains gas and nothing else at the 2021 Census: 85.9%, or 4,905, against 82.2% for Bromley as a whole. In those homes a battery works on the electricity bill, not the heating. PVGIS models an unshaded, south-facing 4 kWp roof here at 4,128 kWh a year, but the year is lopsided: about 509 kWh in July and 141 in December. A battery carries a summer afternoon’s surplus into the evening; in midwinter there is far less surplus to carry.

The worked example further down shows a 10 kWh battery taking the home’s own use of that output from under a fifth to over half, for a household using 2,500 to 2,999 kWh a year. Plenty of West Wickham homes will use more. The ward’s 323 households on electric-only central heating are one group. Households that start charging a car at home are another, and this is a ward of drivers: 85.5% of households had a car or van in 2021, 41.8% had two or more, and 11.5% had three or more, against 7.9% across Bromley. Either way, we size the battery from your own usage profile and time of use.

Semis, owner-occupiers and who gives consent

At the 2021 Census nearly half the ward’s households, 47.3%, lived in a semi-detached house, well above the borough’s 29.9%, and 82.9% lived in a whole house of some kind. Most owned it: 84.3% of 5,709 households, 44.9% outright, where Bromley overall stood at 68.5% and 33.0%. A battery and its inverter are fixed to the house and wired into its electrical installation, so in most West Wickham homes the person who books the survey is the person who decides.

Tenants, the 10.6% of households renting privately and 4.7% from a social landlord, need the landlord’s agreement first. In a purpose-built flat, home to 12.6% of households, or for the 123 households living in a commercial building, such as a flat over a shop, the freeholder may need to agree as well.

The houses are mostly from one decade. Bromley 030, the ONS middle-layer area that lies wholly inside the ward and holds eight of its ten LSOAs, had 5,050 homes on the Valuation Office Agency’s count at 31 March 2026, and 3,310 of them, 65.5%, were built between 1930 and 1939, against 25.6% across Bromley; only 130 predate 1919. The build date says nothing about the consumer unit or wiring a particular house has today, which is why we survey before we quote.

An array that is already on the roof

Solar is counted by borough, not ward: DESNZ recorded 4,093 solar PV installations across Bromley at the end of 2025, against 2,431 at the end of 2020, totalling 19.6 MW. If one of them is on your West Wickham roof, it normally stays. We look over the existing installation and its inverter set-up, establish what storage can safely be integrated with it, and only then put a price on paper. Commissioning and app monitoring are covered on our page about how we install battery storage.

On a bare roof, both go in as one job; every system in our published guide pricing carries 10kWh of storage, and our page on what panels and a battery cost together lists those prices with their conditions.

SPN paperwork for a BR4 battery

BR4 0AA, the West Wickham postcode we checked, sits in grid supply point group _J, which belongs to UK Power Networks’ South Eastern licence, even though the ward is in a London borough; the Beckenham postcode we checked is on the company’s London licence. The paperwork is identical. The network operator treats storage as generation, so a battery with its own inverter is added to the panels’ capacity. If the total stays at or under 16 A per phase, about 3.68 kW on a single-phase supply, the system is a G98 connection: fitted first, then notified within 28 days of commissioning. Above that, a G99 application has to be made and approved before the system is connected. Adding an AC-coupled battery to a G98-sized West Wickham array can therefore tip the house into G99. Either route is part of our standard install.

Flood Zones 2 and 3, and the seven listed entries

The Environment Agency’s river Flood Zones 2 and 3 reach into parts of the ward, mostly along its western edge, so whether they affect you comes down to your address. The Flood Map for Planning answers that for a single property. If yours is in Zone 2 or 3, tell us when you book, because the battery’s position is set by the manufacturer’s installation instructions and a garage or ground-floor wall in a flood zone is worth raising before that choice is made.

The ward has no conservation area, but seven of its entries are on Historic England’s list, every one Grade II, with Glebe House, Oak Lodge and 25 Corkscrew Hill among them. If you live in a listed building, ask Bromley’s planners about listed building consent for the battery and its cable runs before booking the work.

The VAT end date and the GLA’s grant

Fitted in a West Wickham home, a battery carries 0% VAT until 31 March 2027; on 1 April 2027 the rate becomes 5%. HMRC’s VAT Notice 708/6 has covered batteries installed in homes since 1 February 2024, whether they arrive with new panels or join an existing array. Because West Wickham is in a London borough, the grant route runs through the Greater London Authority’s Warm Homes: Local Grant, which pays for a battery only alongside new or existing panels and only for households that qualify; the income, savings and EPC tests are set out in our grants guide.

Keston, where we are based at Glebe Farm Business Park, is in Bromley too, 2.8 miles (4.6 km) from West Wickham in a straight line. Every Census figure above is for West Wickham ward, so it leaves out some BR4 9 postcodes, Wickham Court’s included, that belong to Hayes & Coney Hall ward. Other work on the house’s wiring is covered by our electrician in West Wickham page.

What a battery could be worth on a West Wickham roof

PVGIS 4,128 kWh a year for this town. Illustrative first-year figures, not a guarantee: import 26.32p/kWh (Ofgem energy price cap, 1 Oct – 31 Dec 2026, electricity, Direct Debit, GB average unit rate (26.32p/kWh)); export 12p/kWh (Outgoing Octopus Smart Export Guarantee tariff, 12p/kWh variable (Octopus customers with a half-hourly export meter), read 15 Oct 2026); self-use from MCS MGD 003 Issue 2.0 self-consumption tables, 2,500–2,999 kWh use, occupied half the day. Coutts' guide price for 4kWp with 10kWh battery capacity is from £9,500, inclusive of VAT at 0% (the relief runs to 31 March 2027). Full worked example: solar panel cost in Kent; schemes: solar and battery grants in Kent.

What every battery storage job includes

• 10kWh battery capacity included in every guide-priced system
• Installed and commissioned alongside the array by our own engineers
• App monitoring set up at handover so you can see storage and use
• Retrofit to an existing solar array is possible — we survey first