How Much Solar Does a Mexborough Roof Make in January? The PVGIS Figures, Month by Month

ElectriFusion Solutions · 15 October 2026

January is the month that decides whether a home battery in Mexborough earns its keep from the roof or from the tariff. Below is every month for a south-facing Mexborough roof, from the European Commission's PVGIS model, and what each one means for a 5 kWh and a 10 kWh battery.

A 4.85 kW array in Mexborough, every month

PVGIS 5.2, SARAH2 radiation database, Mexborough town-centre coordinates, south-facing at 35°, 14% system losses, fetched 15 October 2026. Annual total 4,693 kWh (968 kWh per kW), about 1.3% less than Doncaster. Modelled averages, not a guarantee for any particular roof.

The best month here is May at 586 kWh (18.9 kWh a day) and the worst is Dec at 162 kWh (5.2 kWh a day), a ratio of 3.6 to one; that ratio, not the annual total, is what a battery has to live with.

For scale: PVGIS puts the in-plane irradiation on that roof at about 1,190 kWh per square metre a year, and the array converts it to 968 kWh per installed kilowatt; a Mexborough household with the regional average evening load would see the battery cycle fully on about 214 days a year on these figures.

What that means for the battery

Rule of thumb: a 5 kWh battery fills from the roof on a 10 kWh day, a 10 kWh battery on a 16 kWh day, once the house has used its daytime share. For Mexborough the first is true on average in Mar, Apr, May, Jun, Jul, Aug, Sep and the second in Apr, May, Jun, Jul, Aug.

From November to January the average is 5.8 kWh a day. A house that runs a fridge, a router, a kettle and some lighting through the day uses most of that as it arrives, so the battery sees a few hundred watt-hours of surplus, not five kilowatt-hours. That is not a fault with the battery or the panels; it is the latitude.

That something else is the grid

On a time-of-use tariff the battery charges in the cheap overnight window and discharges into the evening peak, every day of the year, solar or not. In the dark months that is the whole of its job in Mexborough; in summer it is a top-up, because the roof has already filled it. The saving is the rate gap times the kilowatt-hours shifted, so ask for the tariff's night and peak rates before the battery's brochure.

Count each day once. A battery that filled overnight has no room for the morning's solar surplus, so on a summer day the saving is the solar or the tariff, not both added together.

So what size for a Mexborough home?

The evening load decides it. Pull a week of half-hourly smart-meter data: if the house uses 4 to 6 kWh between dusk and midnight, 5 kWh is the size; an EV or heat pump pushes it to 10 kWh, and in Mexborough that larger unit is working for the overnight tariff more than for the roof. Registration with the network, standalone options and the models we fit are on battery storage Mexborough; the solar side is on solar panels in Mexborough.

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