Manchester sits at the lower end of the UK output range. PVGIS, the European Commission’s solar model, gives about 886 kWh per kWp a year for a south-facing roof at 35 degrees. That figure assumes no shade and a clear view of the sky. Your own roof will differ, so use it as a starting point.
What a Manchester roof can produce
A 4 kWp system is a common size for a house. At 886 kWh per kWp, it would make about 3,544 kWh a year. London gets about 1,019 kWh per kWp, so Manchester produces about 13% less than the capital.
Aberdeen gives a surprise. It gets about 893 kWh per kWp, slightly more than Manchester. Cloud cover and day length both matter, so latitude alone does not rank the cities. Our post on kWh per kWp explained shows how to read that unit.
Summer against winter
Manchester’s best month is May, at 113.1 kWh per kWp. Its worst is January, at 26.9 kWh per kWp. May therefore delivers about 4.2 times the output of January.
For a 4 kWp system, that means roughly 452 kWh in May and 108 kWh in January. Because the winter dip is steep, a Manchester home will buy most of its winter power from the grid. Our page on solar battery storage covers how a battery shifts some summer surplus into the evening.
Tilt and direction
PVGIS puts the best fixed tilt for Manchester at 39 degrees. That gives 888 kWh per kWp, barely above the 886 you get at 35 degrees. Most pitched roofs already sit near that range.
Direction matters more, however. For a Manchester roof at 35 degrees, PVGIS gives 717 kWh per kWp facing east and 702 facing west. That is about 19% and 21% below the south-facing figure. A north-facing roof drops to 494 kWh per kWp, about 44% lower.
Panels age slowly
A Manchester system will make slightly less each year, although the loss is small. A review by the US National Renewable Energy Laboratory found a median loss of 0.5% a year across nearly 2,000 measured rates. Our guide to solar panel degradation explains what that means over 25 years.
Dirt is a separate question, and we cover it in a post on whether cleaning panels raises output. Check your inverter readings before you pay for a clean.
Planning in Manchester
In England, panels on a house roof are normally permitted development. Their limit is 200mm out from the roof slope, and they must stay below the highest part of the roof. The Planning Portal sets out the full rules.
Listed buildings need planning permission and listed building consent. In a conservation area, however, panels cannot go on a wall or roof section that fronts a highway. Manchester City Council is the planning authority, and it can tell you whether an Article 4 direction applies to your street.
The grid connection
Most of Manchester takes its power from Electricity North West. Since your postcode fixes the operator, use the Energy Networks Association lookup if you are unsure.
A system up to 16A per phase, about 3.68kW on a single-phase supply, falls under rule G98. Your installer tells the network operator within 28 days of commissioning. Larger systems fall under G99, which needs approval before installation, as MCS explains.
Getting quotes
Solar Yield is an independent estimator and referral service. It does not install panels. It passes your enquiry to MCS-certified installers, and you can check any installer on the MCS register.
Read our guide to solar panel installation before you compare offers. MCS rules say an estimate is guidance, not a guarantee, so treat any promise of a fixed output with care.
You may also want a comparison with nearby areas. See solar output in Liverpool and the Leeds estimate for neighbouring figures. While the numbers sit close together, your roof details still decide the result.
Next steps
Use the Solar Yield calculator to estimate output for your own roof. Then send your details through our quote form to receive offers from MCS-certified installers. Estimate openly, then check it against the installer’s figures.