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 4 870 0 870 1.2% £130 £2,400 18 years
2 7 10 1,700 0 1,700 2.4% £260 £3,200 12 years
4 13 19 3,500 7 3,500 4.7% £520 £4,800 9 years
8 27 39 6,500 460 7,000 8.9% £1,000 £7,900 8 years
14 47 68 10,000 2,000 12,000 14% £1,600 £13,000 8 years
16 53 76 11,000 2,700 14,000 15% £1,800 £14,000 8 years
32 107 154 18,000 9,600 28,000 25% £3,200 £26,000 8 years
64 213 307 27,000 29,000 56,000 37% £5,500 £49,000 9 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 St Stephen's Church School in partnership with Bath and NE Somerset Council and Schools Climate Network