Solar panels in East Suffolk: what they generate and what they cost
A 4 kWp array in East Suffolk should generate about 3,948 kWh a year on our modelling — 9% more than the median of the 1,356 places we model. Here is where that number comes from, and what it is worth.
About 3,948 kWh a year from a 4 kWp array, on our modelling for East Suffolk.
That is 987 kWh for every kWp installed — 9% more than the median of the 1,356 UK places we model, and 9% below the sunniest.
| Output per kWp installed | 987 kWh a year |
|---|---|
| A 4 kWp system generates | 3,948 kWh a year |
| Rank for sunshine | 105 of 1356 places we model — see the league table |
| Installed cost, UK median | £6,380 (£1,595/kW) |
| Network operator area | Check yours from your bill — licence areas follow cables, not council boundaries |
Generation modelled by us from PVGIS 5.3 for this place's postcode centroid (52.247, 1.488), at 20% system losses. Contains modified Joint Research Centre data. Cost from Solar photovoltaic (PV) cost data, Department for Energy Security and Net Zero, 2025/26 — no regional figure is published for this area, so the UK median is shown. South-facing at 35° is a modelling convention, not a description of your roof.
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| kWh | 152 | 200 | 336 | 456 | 480 | 480 | 476 | 428 | 368 | 256 | 180 | 132 |
What the number means
68% of the year’s output falls between April and September. April to September gives about 2,688 kWh; November to February gives about 664 kWh. That seasonal shape, not the annual total, is why solar cuts summer bills far more than winter ones.
The honest headline for anyone comparing towns: where you are matters much less than how your roof faces. Across every place we model, the spread from best to worst is about 54%. Turning a roof from south to north costs far more than that — see roof orientation and pitch and north-facing roofs.
The grant that pays for solar
East Suffolk is covered by a consortium delivering the Warm Homes: Local Grant, on the department’s award list as it stood on 2026-07-02.
That matters more than anything else on this page for households that qualify, because the scheme’s guidance lists Solar PV among its eligible measures and permits a battery alongside it — as a grant rather than a loan. Eligibility runs on EPC band D to G plus an income, benefits or deprived-postcode route.
Apply through the council, never through someone who knocks on the door. Full detail: the Warm Homes: Local Grant.
What it is worth
Generation is not saving. What decides the money is how much of it you use as it is produced rather than export:
- at 14% to 23% self-consumption — MCS’s figures for a household without storage — most of this output is exported
- exported units earn your export tariff, which ranges from about 4p to about 12p
- units you use instead avoid buying at about 26p
Put your own consumption in at the calculator, or read self-consumption for why it is the number that decides everything.
Before you get quotes
- Check the price per kW against the benchmark — divide any quote by the array’s kWp.
- Confirm the network position — G98 or G99 — and who your operator is.
- Check the planning position if you are in a conservation area or the building is listed — the planning cluster.
- Get three quotes and compare them properly — comparing quotes.
Sources
- PVGIS 5.3 We ran PVGIS for this place's own postcode centroid at 20% system losses. Contains modified Joint Research Centre data.
- ONS Postcode Directory Centroid and live postcode count for this area.
- Solar photovoltaic (PV) cost data
Contains public sector information licensed under the Open Government Licence v3.0.
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