£1,500 to £10,000. That is the Energy Saving Trust’s range for a home battery, and on its own it tells you very little. This guide narrows it down for a Godalming home, using the Trust’s figures, DESNZ’s published averages and the town’s own housing, then sets out what moves a real quote up or down. It contains no HCE price, because ours comes from a survey of your house, and no savings figure, because that depends on your usage and tariff.
If you want the battery side in full first, where it goes in a Godalming home and how it connects to the network, see our page on battery storage in Godalming.
The national anchors
Two sources do most of the work. The Energy Saving Trust, updated 19 August 2026, says a home battery can range from £1,500 to £10,000, that a 5 kWh system costs around £4,600, and that a typical home system might be 10 kWh, with a lifespan of about 10 to 12 years. For panels, updated 27 August 2026, it puts a typical domestic system at around 4.5 kWp, about 12 panels over 20 to 30 m² of roof, costing around £7,600 installed.
DESNZ publishes what MCS-registered batteries in existing homes actually cost in 2025/26, equipment, installation and VAT where applicable, excluding any solar fitted alongside. For 1–5.99 kWh systems the mean is £1,280 per kWh at an average size of 5.14 kWh; for 6–10.99 kWh it is £870 per kWh at 9.80 kWh. Multiplied out, that is about £6,600 and about £8,500 for an average job in each band (our arithmetic). Larger batteries cost less per kWh, which is not the same as being better value for a home that cannot fill them.
A worked example for a Godalming semi
At the 2011 census, 32.1% of Godalming’s 8,891 households lived in semi-detached houses and 30.3% in detached ones, so a pitched-roof house with its own walls is the common case here. Take a semi with an unshaded south-facing slope, a 4.5 kWp array and a 5 kWh battery fitted together.
On the Energy Saving Trust’s two figures, £7,600 plus £4,600 gives about £12,200. On DESNZ’s averages, 4.5 kWp at its £1,546 per kW median for 4–10 kW solar systems is about £6,960, and a small-band battery about £6,600, so roughly £13,500 as two separate average jobs (our arithmetic). The Trust also says fitting storage at the same time as panels costs less than a separate visit later, so a Godalming job done in one visit should not cost the sum of two separate ones. Neither number is a package price; both describe average jobs across the country.
The VAT window
Under HMRC’s VAT Notice 708/6, residential solar panels and batteries are zero-rated in Great Britain until 31 March 2027, whether the battery comes with panels or on its own. From 1 April 2027 the rate reverts to 5%. On the £12,200 example, 5% would be about £610, assuming the price before VAT stayed the same (our arithmetic). The installer applies the rate; you claim nothing. Our guide to VAT on solar panels and batteries has the detail.
Why Godalming’s winter figure shapes the battery size
PVGIS 5.3 gives about 3,990 kWh a year for a 4 kWp array facing due south at 35° at the Godalming town-centre point, with about 487 kWh in June. December comes out at only about 135 kWh, about 28% of June on our arithmetic, or roughly 4.4 kWh a day. The lesson for cost follows: a battery sized to store winter solar would sit nearly empty from November to February. Sizing it to your evening use, and buying no more capacity than the array can fill in a typical month, is how the cost stays sensible.
What moves a Godalming quote
Listed status comes first. More than 350 listed buildings stand in and around Godalming, 125 of them in the Town Centre Conservation Area, and each needs listed building consent before solar goes on. That adds a step and time before work, and it can push panels to a rear slope with fewer of them. Six of Waverley’s 44 conservation areas sit in and around the town; there, roof slopes keep their permitted development rights, but a flat-roof array needs a prior-approval determination first.
The network is the second factor. The town centre sits in SSEN Distribution’s Southern Electric Power Distribution area, 1.6 km from UK Power Networks’ South Eastern area, so some addresses may be on that network instead. A system up to 16 A per phase (3.68 kW) is notified under G98; a larger one, such as a 5 kW hybrid inverter, needs a G99 application approved before work, and SSEN aims to respond to small applications within 10 working days. The third is the house itself: wall space for the battery, the cable run to the consumer unit, scaffolding, and, for the 18.6% of homes that were flats in 2011, the freeholder’s consent.
Reading the quote
A quote should list the panels, inverter, battery usable capacity, mounting, scaffolding, labour, commissioning, warranties and the network notification, so you can see what the number is made of. Godalming households can also register free for Solar Together Surrey, Surrey County Council’s group-buying scheme run with iChoosr; registering and asking us to quote are not mutually exclusive. For the payback side, see our guide to solar panel payback time in the UK. The roof side is on our page for solar panels in Godalming, and the county picture on our Surrey solar page.
Sources: Energy Saving Trust, Battery storage (updated 19 August 2026) and Solar panels: costs, savings and benefits explained (updated 27 August 2026); DESNZ, MCS-certified domestic battery installation statistics (28 May 2026) and Solar PV cost data (May 2026); HMRC, VAT Notice 708/6; European Commission JRC, PVGIS 5.3, PVGIS-SARAH3 2005–2023, 4 kWp, 35°, due south, 14% losses (run 15 October 2026); ONS Census 2011 (Godalming); Godalming Town Council, About Godalming; Waverley Borough Council, conservation areas register and Godalming Town Centre Conservation Area Appraisal; SSEN, Who we are; NESO and UK Power Networks licence boundary data; Energy Networks Association, EREC G98 Issue 2 (10 March 2025); Surrey County Council, Solar Together Surrey. Read 12–15 October 2026.