Hampshire
Solar panels in Havant, sized to your roof.
A 12-panel roof in Havant makes about 7,210 kWh a year and costs £6,360 installed; a free 30-minute video call sizes it to yours.
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What a roof in Havant can generate
PVGIS puts Havant at 1,133 kWh per kWp a year, 9% above our Hampshire county estimate. 68% of it arrives between April and September, peaking in July.
Generation per kWp, month by month
Show the monthly figures
| Month | kWh/kWp |
|---|---|
| January | 42.1 |
| February | 59.1 |
| March | 98.7 |
| April | 128 |
| May | 136 |
| June | 140 |
| July | 141 |
| August | 122 |
| September | 104 |
| October | 71.3 |
| November | 50.3 |
| December | 40.3 |
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 1,133, Havant is 22% above it.
How Havant compares
Among the places we publish figures for, Havant is one of 45 Hampshire towns we track, and it ranks 7th of 45 for solar yield. It is a medium town in the House of Commons Library classification, with 48,255 residents, and its roofs see 3.10 peak sun hours a day across the year. That drives the standard 12 panel model to 7,206 kWh of generation, of which around 6,269 kWh is exported at 12p for £752 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 Havant's own yield.
Planning applications in Havant go to its own council, 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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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.
Modelled for Havant at 50.85992, -0.98713 on PVGIS data, with imports valued at 26.32p/kWh and solar at £1,000 per kWp installed. Sources and assumptions: help page.
Connecting solar to the Havant network
Havant sits in Scottish and Southern Electricity Networks' Southern England licence area, so SSEN is the network operator (DNO) any solar panels or battery here are registered with.
G98 is the simple route. If the inverter, plus any battery, stays at or under 3.68kW per phase, SSEN only has to be told within 28 days after the system is commissioned.
A bigger inverter or battery output needs a G99 application in advance. SSEN says it can take up to 45 working days to issue a quotation for a generation connection above 3.68kW per phase and up to 50kW.
Sources: NESO DNO licence areas (3 May 2024); SSEN, micro-generation connections page, checked 25 September 2026. G98 vs G99, explained.
Beyond the panels: heating and car charging in Havant
A heat pump in Havant
Solar and a heat pump pull in opposite directions through the year: Havant's roofs make 1,220 kWh from November to February on a 12-panel system, and 3,430 kWh from May to August. The heating season leans on the grid, so off-peak rates do the heavy lifting.
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 Havant
A 12-panel roof in Havant makes about 900 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.
The calculator above includes a 7.4kW smart charger from £1,100 installed. Renters and flat owners with off-street parking can claim 75% of a chargepoint's cost, up to £500 per socket, until 31 March 2027 (gov.uk, checked 28 September 2026).
The packages, priced before anyone visits
Every system is designed around your roof on the free call before anything is fitted.
Solar panel servicing and repair in Havant
Guidance is nationwide, so the benchmarks hold in Havant: repair costs, service scope, and when the inverter is the real fault.
Solar in Havant: your questions answered
What could a roof in Havant generate?
PVGIS puts a roof in Havant at 1,133 kWh per kWp a year, 3.10 peak sun hours a day averaged across the seasons. A 12-panel, 6.36 kWp system makes about 7,210 kWh a year, most of it between April and September.
How much are solar panels in Havant?
The price does not move by postcode. At £1,000 per kWp installed, 12 panels (6.36 kWp) come to £6,360 in Havant before a battery. What Havant changes is the return, about 7,210 kWh a year from that system, and your design call prices your actual roof.
Do I need permission from the DNO for solar in Havant?
Usually not in advance. SSEN, the network operator for Havant, 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. SSEN says it can take up to 45 working days to issue a quotation for a generation connection above 3.68kW per phase and up to 50kW. "See our DNO explainer.
How much can I earn from exporting solar in Havant?
With typical use and no battery, a 12-panel system in Havant exports about 6,269 kWh a year. At 12p per kWh that is roughly £752; a supplier paying more, or a battery that keeps more for the evening, changes the figure. See the export rates table.
Do solar panels work in winter in Havant?
Yes, at a lower level. PVGIS gives Havant 40.3 kWh per kWp in December and 42.1 in January, so a 12-panel system makes about 260 kWh and 270 kWh in those months, against 900 kWh in July. Winter output mostly covers daytime use rather than exporting.
How Havant compares with its neighbours
How the towns nearest Havant compare on the same PVGIS settings, closest first.
| Town | kWh per kWp a year | vs Havant |
|---|---|---|
| Havant | 1,133 | this town |
| Emsworth | 1,146 | +13 kWh |
| Waterlooville | 1,125 | −8 kWh |
| Horndean | 1,111 | −22 kWh |
| Portsmouth | 1,124 | −9 kWh |
| South Hayling | 1,127 | −6 kWh |
| Gosport | 1,116 | −17 kWh |
Each row is a PVGIS v5.2 run at that town's centre with the same settings. Treat gaps of a few kWh as noise and gaps over about 30 kWh per kWp as real differences in sunshine.
Also for Havant: Solar panels in Havant from OVO Solar & Battery
Also near Havant
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Reading for Havant homeowners
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 →What a battery gateway actually does
Without a gateway your system shuts down when the grid does. Here is what the box actually does.
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 →How an air source heat pump actually works
It moves heat rather than making it. The cycle, the efficiency numbers and the trade-offs.
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.