The table below provides estimates of the potential benefits and costs of installing different quantities of solar PV panels at your school

Capacity(kWp) Panels Area (m2) Annual self consumed solar electricity (kWh) Annual exported solar electricity (kWh) Annual output from panels (kWh) Reduction in mains consumption Annual saving Estimated cost Payback years
1 3 4 840 0 840 0.79% £130 £2,400 19 years
2 7 10 1,700 0 1,700 1.6% £250 £3,200 13 years
4 13 19 3,400 0 3,400 3.2% £510 £4,800 9 years
8 27 39 6,700 27 6,700 6.3% £1,000 £7,900 8 years
15 50 72 12,000 950 13,000 11% £1,800 £13,000 7 years
16 53 76 12,000 1,200 13,000 12% £1,900 £14,000 7 years
32 107 154 21,000 6,500 27,000 19% £3,400 £26,000 8 years
64 213 307 32,000 22,000 54,000 30% £5,800 £49,000 8 years

Our analysis

Installing solar PV at your school will reduce the electricity you consume from the national grid, and reduce your school's carbon emissions.  Your PTA might be prepared to help you raise some of the cost of installing the panels. 

The estimates in the table assume you have roof space and that is it roughly south facing - as this is best for schools whose peak demand is during the middle of the day when south facing panels produce the most electricity.

The benefits of solar PV will be reduced if you make your school more energy efficient. However, if you want your school to reduce its carbon emissions you should consider both installing solar panels and reducing your electricity consumption.



Energy Sparks supports Woodthorpe Primary School in partnership with Sheffield City Council