Essex
Solar panels in Witham, with the numbers shown.
About 6,840 kWh a year from 12 panels in Witham, £6,360 installed, with your system designed on a free 30-minute video call.
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What a roof in Witham can generate
From 38 kWh per kWp in December to 129.6 in July: a roof in Witham makes 3.4 times as much in its best month as in its darkest, and 1,075 kWh per kWp across the year.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 40.4 |
| February | 55.4 |
| March | 93.1 |
| April | 121 |
| May | 128 |
| June | 128 |
| July | 130 |
| August | 117 |
| September | 102 |
| October | 71.7 |
| November | 50 |
| December | 38 |
Source: PVGIS v5.2 (European Commission JRC), SARAH3 database, 1 kWp, 14% system loss, 35 degree pitch, due south, checked September 2026.
For scale: 1,075 kWh per kWp in Witham against 925, our GB average (the mean of our 85 county PVGIS estimates), which puts Witham 16% above it.
How Witham compares
Among the places we publish figures for, Witham is one of 46 Essex towns we track, and it ranks 14th of 46 for solar yield. It is a medium town in the House of Commons Library classification, with 28,618 residents, and its roofs see 2.95 peak sun hours a day across the year. That drives the standard 12 panel model to 6,837 kWh of generation, of which around 5,900 kWh is exported at 12p for £708 a year, with £247 saved on electricity you would otherwise buy at 26.32p.
Every figure here assumes a clear, south-facing roof at 35 degrees. Yours will differ, which is what the free design call is for; until then, the calculator below tests panels, batteries and export rates on Witham's own yield.
Witham sits within Braintree, its local planning authority, and the House of Commons Library classes it as a medium town.
The charger is in the installed price but left out of payback: charging savings depend on your mileage and tariff, which the design call models properly.
Your real roof and usage, worked through on a free 30-minute video call. Use the full form or leave three details below.
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Generation is modelled from PVGIS satellite data for Witham's own coordinates (51.80272, 0.63627), using the same 26.32p/kWh import value and £1,000 per kWp installed pricing as every Clearline estimate; the methodology is on our help page.
Connecting solar to the Witham network
On NESO's licence-area map, Witham is in East England, which UK Power Networks operates. That makes UK Power Networks the network operator for any system fitted here.
Below 3.68kW per phase of inverter and battery output, the G98 route applies: the installation is notified to UK Power Networks within 28 days of commissioning, with no prior approval.
A bigger inverter or battery output needs a G99 application in advance. Ofgem's guaranteed standard for a low voltage generation connection quotation is 45 working days, with £80 paid for each working day late, and it binds UK Power Networks as it does every network operator.
Sources: NESO DNO licence areas (3 May 2024); Ofgem, Distributed Generation Standards Direction guidance, checked 27 September 2026. G98 vs G99, explained.
Beyond the panels: heating and car charging in Witham
A heat pump in Witham
Solar and a heat pump pull in opposite directions through the year: Witham's roofs make 1,170 kWh from November to February on a 12-panel system, and 3,200 kWh from May to August. The heating season leans on the grid, so off-peak rates do the heavy lifting.
The Boiler Upgrade Scheme, open in England and Wales, takes £7,500 off an air source or ground source heat pump, or £2,500 off an air-to-air unit. Homes on oil or LPG with no mains gas get £1,500 more until March 2027 (gov.uk, checked 28 September 2026).
Charging an EV in Witham
From April to September, 68% of a Witham roof's yearly output arrives, peaking at about 820 kWh in July on 12 panels. A car parked at home in daylight can soak up what the house, at around 70 kWh of daytime use that month, cannot.
Renters and flat owners with private off-street parking can get 75% off a chargepoint and its installation, up to £500 per socket, until 31 March 2027 (gov.uk, checked 28 September 2026). The calculator above adds a 7.4kW smart charger from £1,100 installed.
Installed prices, the same in every town
Every system is designed around your roof on the free call before anything is fitted.
Solar panel servicing and repair in Witham
Guidance is nationwide, so the benchmarks hold in Witham: repair costs, service scope, and when the inverter is the real fault.
Common questions about solar in Witham
What could a roof in Witham generate?
PVGIS puts a roof in Witham at 1,075 kWh per kWp a year, 2.95 peak sun hours a day averaged across the seasons. A 12-panel, 6.36 kWp system makes about 6,840 kWh a year, most of it between April and September.
What would 12 solar panels cost in Witham?
£6,360 for 12 panels (6.36 kWp), the same as in every other place we cover, because solar is priced at £1,000 per kWp installed rather than by area. A battery adds its own installed price on top. Where Witham differs is output: about 6,840 kWh a year from that system.
Do I need permission from the DNO for solar in Witham?
Usually not in advance. UK Power Networks, the network operator for Witham, only needs a G98 notification within 28 days of commissioning for systems up to 3.68kW per phase. Bigger inverter or battery outputs need G99 approval first. Ofgem's guaranteed standard for a low voltage generation connection quotation is 45 working days, with £80 paid for each working day late, and it binds UK Power Networks as it does every network operator. "See our DNO explainer.
How much would export pay on a system in Witham?
It is exported. With typical use and no battery, about 5,900 kWh of the 6,840 kWh a 12-panel system makes in Witham goes to the grid, around £708 a year at 12p. A battery keeps more of it for the evening; the export rates table shows what suppliers pay.
Do solar panels work in winter in Witham?
Yes, at a lower level. PVGIS gives Witham 38 kWh per kWp in December and 40.4 in January, so a 12-panel system makes about 240 kWh and 260 kWh in those months, against 820 kWh in July. Winter output mostly covers daytime use rather than exporting.
How Witham compares with its neighbours
The six closest towns we publish, run through the identical PVGIS query as Witham.
| Town | kWh per kWp a year | vs Witham |
|---|---|---|
| Witham | 1,075 | this town |
| Tiptree | 1,077 | +2 kWh |
| Maldon | 1,086 | +11 kWh |
| Great Notley | 1,062 | −13 kWh |
| Braintree | 1,065 | −10 kWh |
| Chelmsford | 1,061 | −14 kWh |
| Halstead | 1,062 | −13 kWh |
Same PVGIS v5.2 query for every town. Small differences are within year-to-year weather; more than about 30 kWh per kWp apart is geography.
Also for Witham: Solar panels in Witham from OVO Solar & Battery
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Guides worth reading before your call
Sourced, dated and written by us. The same ground we cover on your free call.
Best solar panels UK 2026: what the datasheets actually say
One pick per job, the specs behind each, and what moves payback more than the badge.
Read the guide →Does a standalone battery actually pay back?
No panels means one job: buy cheap, use later. The tariff decides whether it pays.
Read the guide →The main home EV chargers, compared on what actually differs
Eight popular UK home chargers on cable, connectivity, warranty and tariff integration.
Read the guide →Which homes suit a heat pump, and which need work first
The trial data says no property type is unsuitable. Design quality decides the outcome.
Read the guide →Which tariffs are actually built for battery charging
A battery buys cheap and uses dear. The tariff decides how much that is worth.
Read the guide →HIES explained: what the badge actually protects, and when
What HIES protects: deposits up to 25 percent capped at 5,000 pounds, and your workmanship guarantee.
Read the guide →Get my free quote
Takes about two minutes. We call or text within one working day to book your free 30-minute video design call at a time that suits you. We design it around your roof and your numbers, and our MCS-certified, fully insured installation teams install it.