The short version
Solar panels make electricity, not heat for an oil boiler. In an oil-heated home they cover lights, appliances and the heating system’s own electrical parts, and summer surplus can warm water through an immersion diverter. Burning less oil for space heating is a separate decision, usually about a heat pump and the Boiler Upgrade Scheme.
Where the off-gas households are
The Census records what each household’s central heating runs on. Across Cheshire West and Chester, 3.5% of households rely on oil alone. In the Shakerley ward the figure is 8.5%, about 2.4 times the borough share, and only 64.5% of Shakerley households heat with mains gas alone, the lowest of the seven wards in this guide (Census 2021).
| Ward | Households | Mains gas only | Oil only | Electric only |
|---|---|---|---|---|
| Shakerley | 2,182 | 64.5% | 8.5% | 3.2% |
| Davenham, Moulton & Kingsmead | 4,571 | 85.3% | 1.6% | 2.8% |
| Hartford & Greenbank | 3,814 | 83.6% | 1.0% | 5.7% |
| Northwich Leftwich | 2,279 | 76.5% | 0.6% | 10.9% |
| Rudheath | 2,484 | 85.3% | 0.5% | 2.8% |
| Northwich Winnington & Castle | 4,065 | 83.6% | 0.3% | 5.8% |
| Northwich Witton | 2,336 | 79.1% | 0.2% | 5.5% |
Shakerley has 2,182 households, so its oil-only share works out at roughly 190 households. The categories in the table are “only” categories: a household using two kinds of central heating sits in a separate group, so the columns do not add up to 100%. The remaining 35.5% of Shakerley households reported something other than mains gas on its own, whether oil, electricity, another fuel or a combination.
The census figure describes the ward as a whole. This guide does not try to say which roads within it are off the gas network; if you are unsure about your own, your bills already answer the question.
What solar does for an oil-heated house
Solar panels make electricity. In a house heated by oil, that electricity covers the same things it would in any home: lighting, cooking, appliances, electronics, and the electrical parts of the heating system. An oil boiler still needs power for its burner and controls, and the central heating pump runs on electricity too, so a small part of running the heating is electrical. A bright summer day covers that comfortably, at a time of year when the boiler is mostly heating water.
Hot water is the main overlap between the two. If the house has a hot water cylinder with an electric immersion heater, a diverter can send surplus solar electricity to the immersion instead of exporting it. On a summer day that can warm the cylinder and leave the oil boiler less to do. Whether it suits your system depends on the cylinder, the controls and how the household uses hot water, so ask the installer to look at it during the survey.
What solar does not do
- It does not heat the house in winter. Panels make least in the months when an oil-heated house needs the most heat, so space heating stays largely on oil.
- It does not replace the boiler or change anything about the oil tank and deliveries.
- It does not keep power on in a cut unless the system is specifically designed with backup.
- It does not make the house warmer. Insulation and draught-proofing do that, and they deserve a look in any off-gas home.
The seasonal mismatch is plain in the modelled output. A due-south 35° roof near Northwich averages 26.9 kWh per kWp in December against 116.6 in June, according to PVGIS 5.3. The heating season and the solar season barely overlap. The month-by-month pattern is on output on a Northwich roof.
Heat pumps are a separate decision
Households that want to burn less oil usually end up considering a heat pump, which uses electricity to move heat from the outside air or the ground into the house. That is a different project from solar. It depends on how much heat the building loses, the size of the radiators, room for a cylinder and an outdoor unit, and the electrical supply. A heat pump also has its own support route, the Boiler Upgrade Scheme, with its own conditions. This guide does not cover that scheme’s amounts or rules, so check its official pages before planning around it, and use a firm certified under MCS for heat pumps.
Solar and a heat pump can still work well together. Panels can cover part of a heat pump’s electricity in spring, summer and autumn, when it is mostly heating water or running gently. In midwinter, when the heat pump works hardest, the panels contribute little. If both are on the cards, plan the electrical side of the two together, so the supply, the consumer unit and any battery can cope with all of it. Other support available locally is set out in grants and schemes.
Bigger plots in Hartford, Greenbank, Davenham and Moulton
Two wards near Northwich stand out for larger houses. In Hartford and Greenbank, 50.5% of households live in detached houses, and in Davenham, Moulton and Kingsmead the share is 48.2%, against 30.6% across the borough (Census 2021). Shakerley, at 38.4%, is above the borough level too.
Detached houses often come with more roof, a garage or workshop, and garden space, which opens up options beyond the main roof. They can also have more complicated roofs, with hips, valleys and dormers that break up the area available for panels. A good survey looks at every usable surface, not only the slope facing the road.
Stand-alone arrays in the garden
Panels do not have to go on a building. Class B of Part 14 of the permitted development order, as amended by SI 2026/896, covers stand-alone solar in the grounds of a house. It allows an array of up to 9 m² without a planning application, subject to further conditions on matters such as height and position that are worth reading in full. An array bigger than that falls outside Class B and needs planning permission.
A 9 m² ceiling does not hold many panels, so a garden array under permitted development is small. It suits a household with an unshaded garden and a main roof that is shaded, awkward or protected. Ground mounting makes cleaning and maintenance easier, and the panels can be set at whatever angle suits the site. Against that, a cable has to run from the array to the house, usually underground, which adds digging, and the frames need sound footings. In Northwich, which lies within the brine subsidence compensation district, it is sensible to ask how the footings were chosen; the background is in subsidence and solar.
Outbuildings, garages and workshops
The roof rules in Class A cover buildings within the grounds of a house as well as the house itself. A detached garage, workshop or stable can therefore take panels on the same terms: no more than 0.2 m proud of the slope and below the highest part of its roof. In a conservation area the same exclusions apply, and a flat-roofed garage needs the council’s prior approval decision first; see conservation areas.
Outbuildings raise practical questions of their own. Garages and sheds are often built more lightly than houses, with slimmer rafters or sheet roofs that were never meant to carry extra weight, and older sheet roofs may contain asbestos cement that should not be drilled without specialist advice. The cable from the outbuilding to the house has to be sized and routed properly, and the inverter needs a sensible home. If the outbuilding has its own electricity supply, ask how the array will connect to it.
Checks before an off-gas home gets solar
- Decide what you want the panels to do: cover electricity use, warm water through a diverter, or prepare the ground for a heat pump.
- Ask whether your hot water cylinder suits a diverter.
- List every possible surface: main roof, garage, outbuilding and garden.
- Check the planning position for each: conservation area, listing, and whether a garden array fits inside Class B.
- If a heat pump is a possibility, say so at the survey so the electrical design leaves room.
- Get the structure checked properly, especially on older or lightly built roofs; the roof structure check lists what to expect.
A battery can help a household that is out during the day; see batteries. The wider picture of Northwich housing, ward by ward, is on Northwich homes by ward.
Census figures describe households in April 2021 and whole wards, not individual streets. Planning conditions for garden arrays and outbuildings are summarised, not reproduced; read Part 14 or ask the council before relying on them.