Commercial solar cost calculator

Tell us your average electricity bill and choose a finance route to see what solar could be worth to your business, month by month.

Your results will appear here

Tell us your electricity bill, choose a solution and a finance route, and we will show your installed cost, payback and 25 year position. Change any answer and the figures update.

25 year net benefit

£424,151

Indicative installed cost

£44,742

Year 1 estimated energy saving

£9,900

Payback

4 years

Average monthly impact over 25 years

+£1,414 a month

Buy a 50 kWp system for £44,742 and it pays for itself in year 4. Across 25 years that leaves you, on average, £1,414 a month better off.

This is an estimated saving. Assumptions are made and many factors are involved in the estimation: the result depends on viable roof space, radiation levels, work times, production times and many other variables.

Year by year impact

Year	Energy saving	Costs	Tax relief	Net (profit / cost)	Cumulative
1	£9,900	£45,142	£11,186	-£24,057	-£24,057
2	£10,388	£424	–	£9,964	-£14,093
3	£10,903	£449	–	£10,453	-£3,640
4	£11,446	£476	–	£10,969	£7,330
5	£12,019	£505	–	£11,514	£18,843
6	£12,624	£535	–	£12,088	£30,932
7	£13,262	£567	–	£12,694	£43,626
8	£13,935	£601	–	£13,334	£56,960
9	£14,645	£638	–	£14,008	£70,968
10	£15,395	£676	–	£14,719	£85,687
11	£16,186	£716	–	£15,469	£101,156
12	£17,020	£759	–	£16,261	£117,417
13	£17,900	£805	–	£17,095	£134,512
14	£18,829	£853	–	£17,975	£152,487
15	£19,808	£904	–	£18,904	£171,391
16	£20,842	£959	–	£19,883	£191,274
17	£21,932	£1,016	–	£20,916	£212,189
18	£23,082	£1,077	–	£22,005	£234,194
19	£24,295	£1,142	–	£23,153	£257,348
20	£25,575	£1,210	–	£24,365	£281,712
21	£26,925	£1,283	–	£25,642	£307,354
22	£28,349	£1,360	–	£26,989	£334,344
23	£29,852	£1,441	–	£28,410	£362,754
24	£31,436	£1,528	–	£29,908	£392,662
25	£33,108	£1,620	–	£31,488	£424,151

Illustrative estimates only, not a quotation or tax advice. Assumes 900 kWh per kWp a year, 6% yearly energy price rise over the 25 year projection, 0.5% yearly panel degradation, 10p/kWh export, battery shifting 300 cycles a year from 10p off-peak, and maintenance of £8/kWp a year. Pricing excludes DNO upgrades and additional cabling. Finance is subject to status. Your free assessment uses your half hourly data for an accurate, fully costed report.

Book Your Free Assessment

1. Your electricity

Average monthly electricity bill2,000

2. Choose your solar solution

Based on your bill we suggest a 50 kWp system. Installed rates fall as systems get bigger, and the price updates as you change the size. Change it any time under "Adjust assumptions". This is a model only: the result depends on viable roof space, radiation levels, work times, production times and many other variables.

Battery storage0 kW

3. Finance choice

4. Email me my results

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