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 4 830 0 830 0.095% £130 £2,400 19 years
2 7 10 1,700 0 1,700 0.19% £250 £3,200 13 years
4 13 19 3,300 0 3,300 0.38% £500 £4,800 10 years
8 27 39 6,700 0 6,700 0.76% £1,000 £7,900 8 years
16 53 76 13,000 0 13,000 1.5% £2,000 £14,000 7 years
32 107 154 27,000 0 27,000 3% £4,000 £26,000 7 years
64 213 307 53,000 480 53,000 6% £8,000 £49,000 6 years
128 427 615 96,000 11,000 110,000 11% £15,000 £89,000 6 years
256 853 1,228 150,000 60,000 210,000 17% £26,000 £150,000 6 years
410 1,367 1,968 200,000 150,000 340,000 22% £37,000 £180,000 4 years 10 months

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 Tain Royal Academy in partnership with Highland Council