Essex
Solar panels in Harwich, with the numbers shown.
A 12-panel roof in Harwich makes about 6,950 kWh a year and costs £6,360 installed; a free 30-minute video call sizes it to yours.
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Harwich's solar year
From 37.5 kWh per kWp in December to 135.6 in July: a roof in Harwich makes 3.6 times as much in its best month as in its darkest, and 1,092 kWh per kWp across the year.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 39.8 |
| February | 55 |
| March | 91.5 |
| April | 126 |
| May | 134 |
| June | 134 |
| July | 136 |
| August | 119 |
| September | 103 |
| October | 70 |
| November | 48.2 |
| December | 37.5 |
Source: PVGIS v5.2 (European Commission JRC), SARAH3 database, 1 kWp, 14% system loss, 35 degree pitch, due south, checked September 2026.
Our GB average is 925 kWh per kWp a year, the mean of the 85 county PVGIS estimates we publish; at 1,092, Harwich is 18% above it.
How Harwich compares
Small towns rarely get published solar figures, so here are the numbers for Harwich. It is one of 46 Essex towns we track, and it ranks 5th of 46 for solar yield, a town of 20,391 people in the House of Commons Library settlement data. PVGIS gives its roofs 1,092 kWh per kWp a year, 2.99 peak sun hours a day averaged across the seasons, and the standard 12 panel model turns that into £968 of year one benefit, £247 of it from your own generation and £721 from export at 12p.
Treat these as calibration rather than a quote. The calculator below runs the same model, opened on Harwich's own yield, and prices a 12 panel system at £6,360 installed before any battery. Your free design call reworks every number for your actual roof, its shading and your usage.
Tendring is the planning authority covering Harwich, which the House of Commons Library classes as a small 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.
Price this for your roof
Three details. We call or text within one working day to book your free 30-minute design call, on video or by phone if you prefer.
The figures use PVGIS for the centre of Harwich (51.93231, 1.25883), a 26.32p/kWh import price and £1,000 per kWp installed; see the help page for the full method.
Who runs the grid in Harwich
UK Power Networks owns and runs the local electricity network in Harwich, as part of its East England licence area.
For a typical home the paperwork is light: a system of up to 3.68kW per phase goes through G98, which means UK Power Networks is notified within 28 days of switch-on rather than asked beforehand.
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.
Heat pumps and EV charging in Harwich
A heat pump in Harwich
A heat pump does most of its work from November to February. Over those four months, 12 panels in Harwich make about 1,150 kWh, against 3,320 kWh from May to August, so winter heating runs mostly on grid electricity and the tariff matters more than the roof.
Grant support in England comes from the Boiler Upgrade Scheme: £7,500 for an air source or ground source heat pump, £2,500 for air-to-air, and an extra £1,500 until March 2027 where the home is heated by oil or LPG off the gas grid (gov.uk, checked 28 September 2026).
Charging an EV in Harwich
From April to September, 69% of a Harwich roof's yearly output arrives, peaking at about 860 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.
If you rent, or own a flat, and have private off-street parking, the government chargepoint grant covers 75% of the cost, capped at £500 a socket, until 31 March 2027 (gov.uk, checked 28 September 2026). The calculator above prices 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 Harwich
Faults, servicing and ageing inverters follow the same economics in Harwich as anywhere else, and the guides below price them plainly.
Harwich solar questions
What does a solar panel system produce in Harwich?
Each kWp of panels in Harwich makes 1,092 kWh a year on PVGIS figures, so a typical 12-panel system produces around 6,950 kWh, from about 240 kWh in December up to 860 kWh in July.
How much are solar panels in Harwich?
The price does not move by postcode. At £1,000 per kWp installed, 12 panels (6.36 kWp) come to £6,360 in Harwich before a battery. What Harwich changes is the return, about 6,950 kWh a year from that system, and your design call prices your actual roof.
Would a system in Harwich need approval from the network operator?
Harwich is on UK Power Networks' network (East England licence area). Systems up to 3.68kW per phase of inverter output follow G98: UK Power Networks is notified within 28 days of commissioning, with no approval needed first. Anything larger needs a G99 application before installation. 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. Our G98 vs G99 guide explains both routes.
How much can I earn from exporting solar in Harwich?
With typical use and no battery, a 12-panel system in Harwich exports about 6,008 kWh a year. At 12p per kWh that is roughly £721; a supplier paying more, or a battery that keeps more for the evening, changes the figure. See the export rates table.
Is solar worth it in Harwich in winter?
It works, but the year is lopsided. 69% of a Harwich roof's output lands between April and September; the four months from November to February give about 1,150 kWh on a 12-panel system. Payback is worked out on the whole year, not the winter.
How Harwich compares with its neighbours
How the towns nearest Harwich compare on the same PVGIS settings, closest first.
| Town | kWh per kWp a year | vs Harwich |
|---|---|---|
| Harwich | 1,092 | this town |
| Felixstowe | 1,074 | −18 kWh |
| Kesgrave | 1,090 | −2 kWh |
| Ipswich | 1,079 | −13 kWh |
| Clacton-on-Sea | 1,110 | +18 kWh |
| Woodbridge | 1,095 | +3 kWh |
| Brightlingsea | 1,109 | +17 kWh |
PVGIS v5.2 for each town centroid, identical assumptions throughout. A few kWh either way is weather-year noise; a spread beyond about 30 kWh per kWp is real geography.
Also for Harwich: Solar panels in Harwich from OVO Solar & Battery
Also near Harwich
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Reading for Harwich homeowners
Sourced, dated and written by us. The same ground we cover on your free call.
Solar panel grants and funding in 2026: what actually exists, and what is a sales pitch
No blanket grant exists, and the four supports that do exist are better than most of the adverts.
Read the guide →Which battery size band does your home fall into?
Where UK homes actually land, why oversizing costs you, and what shifts the band.
Read the guide →What it really costs to charge an EV at home versus in public
Home off-peak charging costs a fraction of the public price. The arithmetic, and the tariff it depends on.
Read the guide →Are air source heat pumps any good? What owners actually report
The UK's largest survey found 80% of heat pump owners satisfied, against 70% for gas boilers.
Read the guide →The price cap explained, and what it does to solar payback
The cap limits unit rates, not bills. That changes what solar payback means.
Read the guide →How to check an MCS certificate is genuine, before the deposit leaves your account
A logo proves nothing. Certification is business specific, technology specific and checkable.
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.