Essex
Solar panels in Grays, sized to your roof.
About 6,710 kWh a year from 12 panels in Grays, £6,360 installed, with your system designed on a free 30-minute video call.
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or call 07782 219224
- Free 30-minute video design call
- Priced before anyone visits
- Installed by our MCS-certified, fully insured teams
Grays' solar year
From 37.8 kWh per kWp in December to 130.3 in July: a roof in Grays makes 3.4 times as much in its best month as in its darkest, and 1,055 kWh per kWp across the year.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 39.2 |
| February | 52.9 |
| March | 88.6 |
| April | 117 |
| May | 126 |
| June | 127 |
| July | 130 |
| August | 116 |
| September | 100 |
| October | 70.4 |
| November | 48.6 |
| December | 37.8 |
Source: PVGIS v5.2 (European Commission JRC), SARAH3 database, 1 kWp, 14% system loss, 35 degree pitch, due south, checked September 2026.
For scale: 1,055 kWh per kWp in Grays against 925, our GB average (the mean of our 85 county PVGIS estimates), which puts Grays 14% above it.
How Grays compares
Among the places we publish figures for, Grays is one of 46 Essex towns we track, and it ranks joint 28th of 46 for solar yield. It is a medium town in the House of Commons Library classification, with 45,535 residents, and its roofs see 2.89 peak sun hours a day across the year. That drives the standard 12 panel model to 6,710 kWh of generation, of which around 5,773 kWh is exported at 12p for £693 a year, with £247 saved on electricity you would otherwise buy at 26.32p.
These are starting numbers, not a quote. The calculator below opens on Grays' own PVGIS figure; change the panels, the battery or the export rate and it reruns. The design call replaces every assumption with your roof and your bills.
Thurrock is the planning authority covering Grays, which the House of Commons Library classes 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.
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.
Generation is modelled from PVGIS satellite data for Grays' own coordinates (51.48561, 0.33239), 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.
Who runs the grid in Grays
On NESO's licence-area map, Grays is in East England, which UK Power Networks operates. That makes UK Power Networks the network operator for any system fitted here.
Most home systems stay within 3.68kW per phase of inverter output, which puts them on G98, a notification to UK Power Networks within 28 days of switch-on. Panel count does not decide it; the inverter and any battery do.
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.
Adding a heat pump or an EV charger in Grays
A heat pump in Grays
A heat pump does most of its work from November to February. Over those four months, 12 panels in Grays make about 1,140 kWh, against 3,180 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 Grays
A 12-panel roof in Grays makes about 830 kWh in July. A typical home uses around 70 kWh of that in daylight (the calculator's typical-use settings), which leaves most of the month's output for an EV or for export.
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.
What the named kit costs, installed
Every system is designed around your roof on the free call before anything is fitted.
Solar panel servicing and repair in Grays
Faults, servicing and ageing inverters follow the same economics in Grays as anywhere else, and the guides below price them plainly.
Common questions about solar in Grays
What does a solar panel system produce in Grays?
Each kWp of panels in Grays makes 1,055 kWh a year on PVGIS figures, so a typical 12-panel system produces around 6,710 kWh, from about 240 kWh in December up to 830 kWh in July.
How much are solar panels in Grays?
The price does not move by postcode. At £1,000 per kWp installed, 12 panels (6.36 kWp) come to £6,360 in Grays before a battery. What Grays changes is the return, about 6,710 kWh a year from that system, and your design call prices your actual roof.
Would a system in Grays need approval from the network operator?
Grays 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 Grays?
With typical use and no battery, a 12-panel system in Grays exports about 5,773 kWh a year. At 12p per kWh that is roughly £693; 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 Grays in winter?
It works, but the year is lopsided. 68% of a Grays roof's output lands between April and September; the four months from November to February give about 1,140 kWh on a 12-panel system. Payback is worked out on the whole year, not the winter.
How Grays compares with its neighbours
The six closest towns we publish, run through the identical PVGIS query as Grays.
| Town | kWh per kWp a year | vs Grays |
|---|---|---|
| Grays | 1,055 | this town |
| Chadwell St Mary | 1,057 | +2 kWh |
| Tilbury | 1,057 | +2 kWh |
| Chafford Hundred, West Thurrock and Purfleet-on-Thames | 1,052 | −3 kWh |
| South Ockendon | 1,050 | −5 kWh |
| Swanscombe | 1,041 | −14 kWh |
| Northfleet | 1,052 | −3 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 Grays: Solar panels in Grays from OVO Solar & Battery
Also near Grays
See a number before you speak to anyone
Answer a few questions about your roof and usage and see an instant solar and battery estimate. No email needed to see the result.
Guides worth reading before your call
Sourced, dated and written by us. The same ground we cover on your free call.
The 0% VAT deadline: what ends on 31 March 2027, and what it costs to miss it
The install deadline is still 31 March 2027. Electricity's 0% VAT was extended to the end of June.
Read the guide →Inside a home battery: capacity, power and losses
Usable capacity, kW output, round trip losses and chemistry, in plain terms.
Read the guide →Three phase and EV charging: what actually changes
Three phase buys 22kW charging. Most cars cannot use it, and load balancing usually solves the real problem.
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 →Will energy prices keep rising, and by how much
The January forecasts jumped fast. What is confirmed, what is guessed, and whether solar is a real hedge.
Read the guide →NAPIT, NICEIC and competent person schemes: who tells building control about your solar
Solar work is notifiable. A competent person scheme means your installation team notifies, not you.
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.