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Feed-In Tariff Calculator

Solar PV (Photovoltaic)

Our calculations are unbiased representations of potential payback from Solar PV. To firm up these figures you should arrange a quote from an MCS certified company, this is a requirement of the Feed-in Tariff.

For free, we can contact up to 4 certified companies on your behalf to arrange a quote.

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  • Calc by Roof
  • Calc by System Size (kWp)
  • Calc by System Price

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Calc by System Size (kWp)

Please specify the size of system:

Calc by System Price

Please tell us about your priced system:

Our Assumptions:
  • My daytime electricity rate: £ per kWh (inc VAT)
  • Use Standard Export Tariff (4.64p/kWh in July 2013) ... OR ...
    My energy supplier has agreed to buy back at £ per kWh
  • % of the energy generated will be used in my home
  • I will have an export meter: 
  • I want to assess the benefits over a year period
  • Assume RPI of % and annual energy price inflation of %
  • The roof angle is ° (or panel mounting angle if standalone)
  • Assume panel degradation to % of year 1 output after 30 years
  • Assume inverter lifetime of years
  • Assume cable/inverter system losses of % of output
Change our assumptions
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Based on the details above we estimate your annual income and overall investment payback to be as follows:

Solar PV (Photovoltaic) Feed-In Tariff Summary

Based on the details provided we estimate your annual income and overall investment payback to be as follows:

Total Profit Over 20 Years

£821.98

0.79% per year

(0.73% AER)

Investment in 3.22kWp System: *
£5,229.92
First Year
Income from Feed-In Generation Tariff @ 0.00p/kWh:
£0.00
 
Income from exporting energy through the Export Tariff @ 0.00p/kWh:
£0.00
 
Electricity Saving:
£193.40
 
Total Benefit:
£193.40
Payback Time:
 
20y 5m
Total Profit Over 20 years:
£821.98

Total Profit Over 20 Years

£821.98

0.79% per year

(0.73% AER)

You could save even more with a solar storage battery Learn more here

* These estimates are calculated by comparing a range of MCS certified panels to determine the best possible payback.
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kWh Generation per month

£ Payback over 20 years

Calculations include solar radiation and system losses in a central UK location due to Temperature 6.6% and Angular Reflectance 3.1%, as well as other losses (e.g. Cables, Inverter) of 15%. You can change the Inverter/Cable loss and other assumptions in the calculator box above if you wish.

These are the details we used to calculate your payback and some alternative scenarios:

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Greatest 20yr Payback:

System
Power
Est Outlay
Feed-In & Savings
Pay back time
Profit over 20yrs
More
System 14 x Sharp 230W Poly
Power 3.22kWp
Est Outlay £5,229.92
Feed-In & Savings £193.40pa
Pay back time 20y 5m
Profit over 20yrs £821.98
More Detailed calc »

Annual breakdown for a 3.22kWp system of 14 x 230Wp panels
Facing S @ 35° in a central UK location permits generation of 2,692kWh/pa

Year
FiT Generation
Export Income
In-house savings
Balance
Year 1
FiT Generation 2,692kWh x 0.00p = £0.00
Export Income 1,346kWh x 0.00p = £0.00
In-house savings 1,346kWh x 14.37p = £193.40
Balance £-5,036.51
Year 2
FiT Generation 2,692kWh x 0.00p = £0.00
Export Income 1,346kWh x 0.00p = £0.00
In-house savings 1,346kWh x 15.09p = £203.06
Balance £-4,833.46
Year 3
FiT Generation 2,691kWh x 0.00p = £0.00
Export Income 1,345kWh x 0.00p = £0.00
In-house savings 1,345kWh x 15.84p = £213.16
Balance £-4,620.30
Year 4
FiT Generation 2,690kWh x 0.00p = £0.00
Export Income 1,345kWh x 0.00p = £0.00
In-house savings 1,345kWh x 16.64p = £223.71
Balance £-4,396.59
Year 5
FiT Generation 2,687kWh x 0.00p = £0.00
Export Income 1,344kWh x 0.00p = £0.00
In-house savings 1,344kWh x 17.47p = £234.71
Balance £-4,161.88
Year 6
FiT Generation 2,684kWh x 0.00p = £0.00
Export Income 1,342kWh x 0.00p = £0.00
In-house savings 1,342kWh x 18.34p = £246.16
Balance £-3,915.72
Year 7
FiT Generation 2,680kWh x 0.00p = £0.00
Export Income 1,340kWh x 0.00p = £0.00
In-house savings 1,340kWh x 19.26p = £258.09
Balance £-3,657.63
Year 8
FiT Generation 2,675kWh x 0.00p = £0.00
Export Income 1,338kWh x 0.00p = £0.00
In-house savings 1,338kWh x 20.22p = £270.48
Balance £-3,387.15
Year 9
FiT Generation 2,669kWh x 0.00p = £0.00
Export Income 1,335kWh x 0.00p = £0.00
In-house savings 1,335kWh x 21.23p = £283.35
Balance £-3,103.81
Year 10
FiT Generation 2,662kWh x 0.00p = £0.00
Export Income 1,331kWh x 0.00p = £0.00
In-house savings 1,331kWh x 22.29p = £296.69
Balance £-2,807.11
Year 11
FiT Generation 2,653kWh x 0.00p = £0.00
Export Income 1,327kWh x 0.00p = £0.00
In-house savings 1,327kWh x 23.41p = £310.52
Balance £-2,496.60
Year 12
FiT Generation 2,643kWh x 0.00p = £0.00
Export Income 1,322kWh x 0.00p = £0.00
In-house savings 1,322kWh x 24.58p = £324.83
Balance £-2,171.77
Year 13
FiT Generation 2,632kWh x 0.00p = £0.00
Export Income 1,316kWh x 0.00p = £0.00
In-house savings 1,316kWh x 25.81p = £339.62
Balance £-1,832.15
Year 14
FiT Generation 2,619kWh x 0.00p = £0.00
Export Income 1,310kWh x 0.00p = £0.00
In-house savings 1,310kWh x 27.10p = £354.88
Balance £-1,477.27
Year 15
FiT Generation 2,605kWh x 0.00p = £0.00
Export Income 1,303kWh x 0.00p = £0.00
In-house savings 1,303kWh x 28.45p = £370.62
Balance £-1,106.64
Year 16
FiT Generation 2,590kWh x 0.00p = £0.00
Export Income 1,295kWh x 0.00p = £0.00
In-house savings 1,295kWh x 29.87p = £386.83
Balance £-1,863.68
Year 17
FiT Generation 2,573kWh x 0.00p = £0.00
Export Income 1,286kWh x 0.00p = £0.00
In-house savings 1,286kWh x 31.37p = £403.49
Balance £-1,460.19
Year 18
FiT Generation 2,554kWh x 0.00p = £0.00
Export Income 1,277kWh x 0.00p = £0.00
In-house savings 1,277kWh x 32.94p = £420.60
Balance £-1,039.59
Year 19
FiT Generation 2,534kWh x 0.00p = £0.00
Export Income 1,267kWh x 0.00p = £0.00
In-house savings 1,267kWh x 34.58p = £438.12
Balance £-601.47
Year 20
FiT Generation 2,512kWh x 0.00p = £0.00
Export Income 1,256kWh x 0.00p = £0.00
In-house savings 1,256kWh x 36.31p = £456.06
Balance £-145.42
System 14 x Sharp 235W Poly
Power 3.29kWp
Est Outlay £5,337.73
Feed-In & Savings £197.61pa
Pay back time 20y 5m
Profit over 20yrs £845.73
More Detailed calc »

Annual breakdown for a 3.29kWp system of 14 x 235Wp panels
Facing S @ 35° in a central UK location permits generation of 2,750kWh/pa

Year
FiT Generation
Export Income
In-house savings
Balance
Year 1
FiT Generation 2,750kWh x 0.00p = £0.00
Export Income 1,375kWh x 0.00p = £0.00
In-house savings 1,375kWh x 14.37p = £197.61
Balance £-5,140.12
Year 2
FiT Generation 2,750kWh x 0.00p = £0.00
Export Income 1,375kWh x 0.00p = £0.00
In-house savings 1,375kWh x 15.09p = £207.47
Balance £-4,932.65
Year 3
FiT Generation 2,749kWh x 0.00p = £0.00
Export Income 1,375kWh x 0.00p = £0.00
In-house savings 1,375kWh x 15.84p = £217.79
Balance £-4,714.85
Year 4
FiT Generation 2,748kWh x 0.00p = £0.00
Export Income 1,374kWh x 0.00p = £0.00
In-house savings 1,374kWh x 16.64p = £228.57
Balance £-4,486.28
Year 5
FiT Generation 2,746kWh x 0.00p = £0.00
Export Income 1,373kWh x 0.00p = £0.00
In-house savings 1,373kWh x 17.47p = £239.81
Balance £-4,246.47
Year 6
FiT Generation 2,743kWh x 0.00p = £0.00
Export Income 1,371kWh x 0.00p = £0.00
In-house savings 1,371kWh x 18.34p = £251.52
Balance £-3,994.96
Year 7
FiT Generation 2,739kWh x 0.00p = £0.00
Export Income 1,369kWh x 0.00p = £0.00
In-house savings 1,369kWh x 19.26p = £263.70
Balance £-3,731.26
Year 8
FiT Generation 2,734kWh x 0.00p = £0.00
Export Income 1,367kWh x 0.00p = £0.00
In-house savings 1,367kWh x 20.22p = £276.36
Balance £-3,454.90
Year 9
FiT Generation 2,727kWh x 0.00p = £0.00
Export Income 1,364kWh x 0.00p = £0.00
In-house savings 1,364kWh x 21.23p = £289.51
Balance £-3,165.40
Year 10
FiT Generation 2,720kWh x 0.00p = £0.00
Export Income 1,360kWh x 0.00p = £0.00
In-house savings 1,360kWh x 22.29p = £303.14
Balance £-2,862.25
Year 11
FiT Generation 2,711kWh x 0.00p = £0.00
Export Income 1,355kWh x 0.00p = £0.00
In-house savings 1,355kWh x 23.41p = £317.27
Balance £-2,544.99
Year 12
FiT Generation 2,701kWh x 0.00p = £0.00
Export Income 1,350kWh x 0.00p = £0.00
In-house savings 1,350kWh x 24.58p = £331.89
Balance £-2,213.10
Year 13
FiT Generation 2,689kWh x 0.00p = £0.00
Export Income 1,345kWh x 0.00p = £0.00
In-house savings 1,345kWh x 25.81p = £347.00
Balance £-1,866.10
Year 14
FiT Generation 2,676kWh x 0.00p = £0.00
Export Income 1,338kWh x 0.00p = £0.00
In-house savings 1,338kWh x 27.10p = £362.60
Balance £-1,503.50
Year 15
FiT Generation 2,662kWh x 0.00p = £0.00
Export Income 1,331kWh x 0.00p = £0.00
In-house savings 1,331kWh x 28.45p = £378.68
Balance £-1,124.82
Year 16
FiT Generation 2,646kWh x 0.00p = £0.00
Export Income 1,323kWh x 0.00p = £0.00
In-house savings 1,323kWh x 29.87p = £395.24
Balance £-1,898.31
Year 17
FiT Generation 2,629kWh x 0.00p = £0.00
Export Income 1,314kWh x 0.00p = £0.00
In-house savings 1,314kWh x 31.37p = £412.26
Balance £-1,486.05
Year 18
FiT Generation 2,610kWh x 0.00p = £0.00
Export Income 1,305kWh x 0.00p = £0.00
In-house savings 1,305kWh x 32.94p = £429.74
Balance £-1,056.31
Year 19
FiT Generation 2,589kWh x 0.00p = £0.00
Export Income 1,294kWh x 0.00p = £0.00
In-house savings 1,294kWh x 34.58p = £447.65
Balance £-608.66
Year 20
FiT Generation 2,566kWh x 0.00p = £0.00
Export Income 1,283kWh x 0.00p = £0.00
In-house savings 1,283kWh x 36.31p = £465.97
Balance £-142.69
System 14 x Sharp 240W Poly
Power 3.36kWp
Est Outlay £5,446.42
Feed-In & Savings £201.81pa
Pay back time 20y 5m
Profit over 20yrs £868.60
More Detailed calc »

Annual breakdown for a 3.36kWp system of 14 x 240Wp panels
Facing S @ 35° in a central UK location permits generation of 2,809kWh/pa

Year
FiT Generation
Export Income
In-house savings
Balance
Year 1
FiT Generation 2,809kWh x 0.00p = £0.00
Export Income 1,404kWh x 0.00p = £0.00
In-house savings 1,404kWh x 14.37p = £201.81
Balance £-5,244.61
Year 2
FiT Generation 2,809kWh x 0.00p = £0.00
Export Income 1,404kWh x 0.00p = £0.00
In-house savings 1,404kWh x 15.09p = £211.89
Balance £-5,032.72
Year 3
FiT Generation 2,808kWh x 0.00p = £0.00
Export Income 1,404kWh x 0.00p = £0.00
In-house savings 1,404kWh x 15.84p = £222.43
Balance £-4,810.29
Year 4
FiT Generation 2,807kWh x 0.00p = £0.00
Export Income 1,403kWh x 0.00p = £0.00
In-house savings 1,403kWh x 16.64p = £233.43
Balance £-4,576.86
Year 5
FiT Generation 2,804kWh x 0.00p = £0.00
Export Income 1,402kWh x 0.00p = £0.00
In-house savings 1,402kWh x 17.47p = £244.91
Balance £-4,331.95
Year 6
FiT Generation 2,801kWh x 0.00p = £0.00
Export Income 1,401kWh x 0.00p = £0.00
In-house savings 1,401kWh x 18.34p = £256.87
Balance £-4,075.08
Year 7
FiT Generation 2,797kWh x 0.00p = £0.00
Export Income 1,398kWh x 0.00p = £0.00
In-house savings 1,398kWh x 19.26p = £269.31
Balance £-3,805.77
Year 8
FiT Generation 2,792kWh x 0.00p = £0.00
Export Income 1,396kWh x 0.00p = £0.00
In-house savings 1,396kWh x 20.22p = £282.24
Balance £-3,523.53
Year 9
FiT Generation 2,785kWh x 0.00p = £0.00
Export Income 1,393kWh x 0.00p = £0.00
In-house savings 1,393kWh x 21.23p = £295.67
Balance £-3,227.87
Year 10
FiT Generation 2,778kWh x 0.00p = £0.00
Export Income 1,389kWh x 0.00p = £0.00
In-house savings 1,389kWh x 22.29p = £309.59
Balance £-2,918.28
Year 11
FiT Generation 2,769kWh x 0.00p = £0.00
Export Income 1,384kWh x 0.00p = £0.00
In-house savings 1,384kWh x 23.41p = £324.02
Balance £-2,594.26
Year 12
FiT Generation 2,758kWh x 0.00p = £0.00
Export Income 1,379kWh x 0.00p = £0.00
In-house savings 1,379kWh x 24.58p = £338.95
Balance £-2,255.31
Year 13
FiT Generation 2,746kWh x 0.00p = £0.00
Export Income 1,373kWh x 0.00p = £0.00
In-house savings 1,373kWh x 25.81p = £354.38
Balance £-1,900.93
Year 14
FiT Generation 2,733kWh x 0.00p = £0.00
Export Income 1,367kWh x 0.00p = £0.00
In-house savings 1,367kWh x 27.10p = £370.31
Balance £-1,530.61
Year 15
FiT Generation 2,719kWh x 0.00p = £0.00
Export Income 1,359kWh x 0.00p = £0.00
In-house savings 1,359kWh x 28.45p = £386.74
Balance £-1,143.87
Year 16
FiT Generation 2,702kWh x 0.00p = £0.00
Export Income 1,351kWh x 0.00p = £0.00
In-house savings 1,351kWh x 29.87p = £403.65
Balance £-1,933.83
Year 17
FiT Generation 2,684kWh x 0.00p = £0.00
Export Income 1,342kWh x 0.00p = £0.00
In-house savings 1,342kWh x 31.37p = £421.04
Balance £-1,512.79
Year 18
FiT Generation 2,665kWh x 0.00p = £0.00
Export Income 1,333kWh x 0.00p = £0.00
In-house savings 1,333kWh x 32.94p = £438.88
Balance £-1,073.91
Year 19
FiT Generation 2,644kWh x 0.00p = £0.00
Export Income 1,322kWh x 0.00p = £0.00
In-house savings 1,322kWh x 34.58p = £457.17
Balance £-616.74
Year 20
FiT Generation 2,621kWh x 0.00p = £0.00
Export Income 1,311kWh x 0.00p = £0.00
In-house savings 1,311kWh x 36.31p = £475.88
Balance £-140.85

Earliest Investment Payback:

System
Power
Est Outlay
Feed-In & Savings
Pay back time
Profit over 20yrs
More
System 16 x Canadian Solar 250W Mono
Power 4.00kWp
Est Outlay £6,299.79
Feed-In & Savings £240.25pa
Pay back time 19y 11m
Profit over 20yrs £16.36
More Detailed calc »

Annual breakdown for a 4.00kWp system of 16 x 250Wp panels
Facing S @ 35° in a central UK location permits generation of 3,344kWh/pa

Year
FiT Generation
Export Income
In-house savings
Balance
Year 1
FiT Generation 3,344kWh x 0.00p = £0.00
Export Income 1,672kWh x 0.00p = £0.00
In-house savings 1,672kWh x 14.37p = £240.25
Balance £-6,059.54
Year 2
FiT Generation 3,344kWh x 0.00p = £0.00
Export Income 1,672kWh x 0.00p = £0.00
In-house savings 1,672kWh x 15.09p = £252.25
Balance £-5,807.29
Year 3
FiT Generation 3,343kWh x 0.00p = £0.00
Export Income 1,671kWh x 0.00p = £0.00
In-house savings 1,671kWh x 15.84p = £264.80
Balance £-5,542.50
Year 4
FiT Generation 3,341kWh x 0.00p = £0.00
Export Income 1,671kWh x 0.00p = £0.00
In-house savings 1,671kWh x 16.64p = £277.90
Balance £-5,264.60
Year 5
FiT Generation 3,338kWh x 0.00p = £0.00
Export Income 1,669kWh x 0.00p = £0.00
In-house savings 1,669kWh x 17.47p = £291.56
Balance £-4,973.04
Year 6
FiT Generation 3,335kWh x 0.00p = £0.00
Export Income 1,667kWh x 0.00p = £0.00
In-house savings 1,667kWh x 18.34p = £305.79
Balance £-4,667.25
Year 7
FiT Generation 3,330kWh x 0.00p = £0.00
Export Income 1,665kWh x 0.00p = £0.00
In-house savings 1,665kWh x 19.26p = £320.60
Balance £-4,346.64
Year 8
FiT Generation 3,323kWh x 0.00p = £0.00
Export Income 1,662kWh x 0.00p = £0.00
In-house savings 1,662kWh x 20.22p = £336.00
Balance £-4,010.64
Year 9
FiT Generation 3,316kWh x 0.00p = £0.00
Export Income 1,658kWh x 0.00p = £0.00
In-house savings 1,658kWh x 21.23p = £351.98
Balance £-3,658.66
Year 10
FiT Generation 3,307kWh x 0.00p = £0.00
Export Income 1,653kWh x 0.00p = £0.00
In-house savings 1,653kWh x 22.29p = £368.56
Balance £-3,290.10
Year 11
FiT Generation 3,296kWh x 0.00p = £0.00
Export Income 1,648kWh x 0.00p = £0.00
In-house savings 1,648kWh x 23.41p = £385.74
Balance £-2,904.36
Year 12
FiT Generation 3,284kWh x 0.00p = £0.00
Export Income 1,642kWh x 0.00p = £0.00
In-house savings 1,642kWh x 24.58p = £403.51
Balance £-2,500.85
Year 13
FiT Generation 3,270kWh x 0.00p = £0.00
Export Income 1,635kWh x 0.00p = £0.00
In-house savings 1,635kWh x 25.81p = £421.88
Balance £-2,078.97
Year 14
FiT Generation 3,254kWh x 0.00p = £0.00
Export Income 1,627kWh x 0.00p = £0.00
In-house savings 1,627kWh x 27.10p = £440.85
Balance £-1,638.12
Year 15
FiT Generation 3,236kWh x 0.00p = £0.00
Export Income 1,618kWh x 0.00p = £0.00
In-house savings 1,618kWh x 28.45p = £460.40
Balance £-1,177.71
Year 16
FiT Generation 3,217kWh x 0.00p = £0.00
Export Income 1,609kWh x 0.00p = £0.00
In-house savings 1,609kWh x 29.87p = £480.54
Balance £-2,118.13
Year 17
FiT Generation 3,196kWh x 0.00p = £0.00
Export Income 1,598kWh x 0.00p = £0.00
In-house savings 1,598kWh x 31.37p = £501.23
Balance £-1,616.90
Year 18
FiT Generation 3,173kWh x 0.00p = £0.00
Export Income 1,586kWh x 0.00p = £0.00
In-house savings 1,586kWh x 32.94p = £522.48
Balance £-1,094.42
Year 19
FiT Generation 3,148kWh x 0.00p = £0.00
Export Income 1,574kWh x 0.00p = £0.00
In-house savings 1,574kWh x 34.58p = £544.25
Balance £-550.17
Year 20
FiT Generation 3,120kWh x 0.00p = £0.00
Export Income 1,560kWh x 0.00p = £0.00
In-house savings 1,560kWh x 36.31p = £566.53
Balance £16.36
System 14 x Sharp 240W Poly
Power 3.36kWp
Est Outlay £5,446.42
Feed-In & Savings £201.81pa
Pay back time 20y 5m
Profit over 20yrs £868.60
More Detailed calc »

Annual breakdown for a 3.36kWp system of 14 x 240Wp panels
Facing S @ 35° in a central UK location permits generation of 2,809kWh/pa

Year
FiT Generation
Export Income
In-house savings
Balance
Year 1
FiT Generation 2,809kWh x 0.00p = £0.00
Export Income 1,404kWh x 0.00p = £0.00
In-house savings 1,404kWh x 14.37p = £201.81
Balance £-5,244.61
Year 2
FiT Generation 2,809kWh x 0.00p = £0.00
Export Income 1,404kWh x 0.00p = £0.00
In-house savings 1,404kWh x 15.09p = £211.89
Balance £-5,032.72
Year 3
FiT Generation 2,808kWh x 0.00p = £0.00
Export Income 1,404kWh x 0.00p = £0.00
In-house savings 1,404kWh x 15.84p = £222.43
Balance £-4,810.29
Year 4
FiT Generation 2,807kWh x 0.00p = £0.00
Export Income 1,403kWh x 0.00p = £0.00
In-house savings 1,403kWh x 16.64p = £233.43
Balance £-4,576.86
Year 5
FiT Generation 2,804kWh x 0.00p = £0.00
Export Income 1,402kWh x 0.00p = £0.00
In-house savings 1,402kWh x 17.47p = £244.91
Balance £-4,331.95
Year 6
FiT Generation 2,801kWh x 0.00p = £0.00
Export Income 1,401kWh x 0.00p = £0.00
In-house savings 1,401kWh x 18.34p = £256.87
Balance £-4,075.08
Year 7
FiT Generation 2,797kWh x 0.00p = £0.00
Export Income 1,398kWh x 0.00p = £0.00
In-house savings 1,398kWh x 19.26p = £269.31
Balance £-3,805.77
Year 8
FiT Generation 2,792kWh x 0.00p = £0.00
Export Income 1,396kWh x 0.00p = £0.00
In-house savings 1,396kWh x 20.22p = £282.24
Balance £-3,523.53
Year 9
FiT Generation 2,785kWh x 0.00p = £0.00
Export Income 1,393kWh x 0.00p = £0.00
In-house savings 1,393kWh x 21.23p = £295.67
Balance £-3,227.87
Year 10
FiT Generation 2,778kWh x 0.00p = £0.00
Export Income 1,389kWh x 0.00p = £0.00
In-house savings 1,389kWh x 22.29p = £309.59
Balance £-2,918.28
Year 11
FiT Generation 2,769kWh x 0.00p = £0.00
Export Income 1,384kWh x 0.00p = £0.00
In-house savings 1,384kWh x 23.41p = £324.02
Balance £-2,594.26
Year 12
FiT Generation 2,758kWh x 0.00p = £0.00
Export Income 1,379kWh x 0.00p = £0.00
In-house savings 1,379kWh x 24.58p = £338.95
Balance £-2,255.31
Year 13
FiT Generation 2,746kWh x 0.00p = £0.00
Export Income 1,373kWh x 0.00p = £0.00
In-house savings 1,373kWh x 25.81p = £354.38
Balance £-1,900.93
Year 14
FiT Generation 2,733kWh x 0.00p = £0.00
Export Income 1,367kWh x 0.00p = £0.00
In-house savings 1,367kWh x 27.10p = £370.31
Balance £-1,530.61
Year 15
FiT Generation 2,719kWh x 0.00p = £0.00
Export Income 1,359kWh x 0.00p = £0.00
In-house savings 1,359kWh x 28.45p = £386.74
Balance £-1,143.87
Year 16
FiT Generation 2,702kWh x 0.00p = £0.00
Export Income 1,351kWh x 0.00p = £0.00
In-house savings 1,351kWh x 29.87p = £403.65
Balance £-1,933.83
Year 17
FiT Generation 2,684kWh x 0.00p = £0.00
Export Income 1,342kWh x 0.00p = £0.00
In-house savings 1,342kWh x 31.37p = £421.04
Balance £-1,512.79
Year 18
FiT Generation 2,665kWh x 0.00p = £0.00
Export Income 1,333kWh x 0.00p = £0.00
In-house savings 1,333kWh x 32.94p = £438.88
Balance £-1,073.91
Year 19
FiT Generation 2,644kWh x 0.00p = £0.00
Export Income 1,322kWh x 0.00p = £0.00
In-house savings 1,322kWh x 34.58p = £457.17
Balance £-616.74
Year 20
FiT Generation 2,621kWh x 0.00p = £0.00
Export Income 1,311kWh x 0.00p = £0.00
In-house savings 1,311kWh x 36.31p = £475.88
Balance £-140.85
System 14 x Sharp 235W Poly
Power 3.29kWp
Est Outlay £5,337.73
Feed-In & Savings £197.61pa
Pay back time 20y 5m
Profit over 20yrs £845.73
More Detailed calc »

Annual breakdown for a 3.29kWp system of 14 x 235Wp panels
Facing S @ 35° in a central UK location permits generation of 2,750kWh/pa

Year
FiT Generation
Export Income
In-house savings
Balance
Year 1
FiT Generation 2,750kWh x 0.00p = £0.00
Export Income 1,375kWh x 0.00p = £0.00
In-house savings 1,375kWh x 14.37p = £197.61
Balance £-5,140.12
Year 2
FiT Generation 2,750kWh x 0.00p = £0.00
Export Income 1,375kWh x 0.00p = £0.00
In-house savings 1,375kWh x 15.09p = £207.47
Balance £-4,932.65
Year 3
FiT Generation 2,749kWh x 0.00p = £0.00
Export Income 1,375kWh x 0.00p = £0.00
In-house savings 1,375kWh x 15.84p = £217.79
Balance £-4,714.85
Year 4
FiT Generation 2,748kWh x 0.00p = £0.00
Export Income 1,374kWh x 0.00p = £0.00
In-house savings 1,374kWh x 16.64p = £228.57
Balance £-4,486.28
Year 5
FiT Generation 2,746kWh x 0.00p = £0.00
Export Income 1,373kWh x 0.00p = £0.00
In-house savings 1,373kWh x 17.47p = £239.81
Balance £-4,246.47
Year 6
FiT Generation 2,743kWh x 0.00p = £0.00
Export Income 1,371kWh x 0.00p = £0.00
In-house savings 1,371kWh x 18.34p = £251.52
Balance £-3,994.96
Year 7
FiT Generation 2,739kWh x 0.00p = £0.00
Export Income 1,369kWh x 0.00p = £0.00
In-house savings 1,369kWh x 19.26p = £263.70
Balance £-3,731.26
Year 8
FiT Generation 2,734kWh x 0.00p = £0.00
Export Income 1,367kWh x 0.00p = £0.00
In-house savings 1,367kWh x 20.22p = £276.36
Balance £-3,454.90
Year 9
FiT Generation 2,727kWh x 0.00p = £0.00
Export Income 1,364kWh x 0.00p = £0.00
In-house savings 1,364kWh x 21.23p = £289.51
Balance £-3,165.40
Year 10
FiT Generation 2,720kWh x 0.00p = £0.00
Export Income 1,360kWh x 0.00p = £0.00
In-house savings 1,360kWh x 22.29p = £303.14
Balance £-2,862.25
Year 11
FiT Generation 2,711kWh x 0.00p = £0.00
Export Income 1,355kWh x 0.00p = £0.00
In-house savings 1,355kWh x 23.41p = £317.27
Balance £-2,544.99
Year 12
FiT Generation 2,701kWh x 0.00p = £0.00
Export Income 1,350kWh x 0.00p = £0.00
In-house savings 1,350kWh x 24.58p = £331.89
Balance £-2,213.10
Year 13
FiT Generation 2,689kWh x 0.00p = £0.00
Export Income 1,345kWh x 0.00p = £0.00
In-house savings 1,345kWh x 25.81p = £347.00
Balance £-1,866.10
Year 14
FiT Generation 2,676kWh x 0.00p = £0.00
Export Income 1,338kWh x 0.00p = £0.00
In-house savings 1,338kWh x 27.10p = £362.60
Balance £-1,503.50
Year 15
FiT Generation 2,662kWh x 0.00p = £0.00
Export Income 1,331kWh x 0.00p = £0.00
In-house savings 1,331kWh x 28.45p = £378.68
Balance £-1,124.82
Year 16
FiT Generation 2,646kWh x 0.00p = £0.00
Export Income 1,323kWh x 0.00p = £0.00
In-house savings 1,323kWh x 29.87p = £395.24
Balance £-1,898.31
Year 17
FiT Generation 2,629kWh x 0.00p = £0.00
Export Income 1,314kWh x 0.00p = £0.00
In-house savings 1,314kWh x 31.37p = £412.26
Balance £-1,486.05
Year 18
FiT Generation 2,610kWh x 0.00p = £0.00
Export Income 1,305kWh x 0.00p = £0.00
In-house savings 1,305kWh x 32.94p = £429.74
Balance £-1,056.31
Year 19
FiT Generation 2,589kWh x 0.00p = £0.00
Export Income 1,294kWh x 0.00p = £0.00
In-house savings 1,294kWh x 34.58p = £447.65
Balance £-608.66
Year 20
FiT Generation 2,566kWh x 0.00p = £0.00
Export Income 1,283kWh x 0.00p = £0.00
In-house savings 1,283kWh x 36.31p = £465.97
Balance £-142.69

Greatest Annual Income:

System
Power
Est Outlay
Feed-In & Savings
Pay back time
Profit over 20yrs
More
System 20 x Sanyo HIT N240SE10
Power 4.80kWp
Est Outlay £10,344.77
Feed-In & Savings £288.30pa
Pay back time 23y 8m
Profit over 20yrs £1,052.77
More Detailed calc »

Annual breakdown for a 4.80kWp system of 20 x 240Wp panels
Facing S @ 35° in a central UK location permits generation of 4,013kWh/pa

Year
FiT Generation
Export Income
In-house savings
Balance
Year 1
FiT Generation 4,013kWh x 0.00p = £0.00
Export Income 2,006kWh x 0.00p = £0.00
In-house savings 2,006kWh x 14.37p = £288.30
Balance £-10,056.47
Year 2
FiT Generation 4,012kWh x 0.00p = £0.00
Export Income 2,006kWh x 0.00p = £0.00
In-house savings 2,006kWh x 15.09p = £302.70
Balance £-9,753.77
Year 3
FiT Generation 4,011kWh x 0.00p = £0.00
Export Income 2,006kWh x 0.00p = £0.00
In-house savings 2,006kWh x 15.84p = £317.75
Balance £-9,436.02
Year 4
FiT Generation 4,009kWh x 0.00p = £0.00
Export Income 2,005kWh x 0.00p = £0.00
In-house savings 2,005kWh x 16.64p = £333.48
Balance £-9,102.54
Year 5
FiT Generation 4,006kWh x 0.00p = £0.00
Export Income 2,003kWh x 0.00p = £0.00
In-house savings 2,003kWh x 17.47p = £349.87
Balance £-8,752.67
Year 6
FiT Generation 4,002kWh x 0.00p = £0.00
Export Income 2,001kWh x 0.00p = £0.00
In-house savings 2,001kWh x 18.34p = £366.95
Balance £-8,385.71
Year 7
FiT Generation 3,996kWh x 0.00p = £0.00
Export Income 1,998kWh x 0.00p = £0.00
In-house savings 1,998kWh x 19.26p = £384.73
Balance £-8,000.99
Year 8
FiT Generation 3,988kWh x 0.00p = £0.00
Export Income 1,994kWh x 0.00p = £0.00
In-house savings 1,994kWh x 20.22p = £403.20
Balance £-7,597.79
Year 9
FiT Generation 3,979kWh x 0.00p = £0.00
Export Income 1,989kWh x 0.00p = £0.00
In-house savings 1,989kWh x 21.23p = £422.38
Balance £-7,175.41
Year 10
FiT Generation 3,968kWh x 0.00p = £0.00
Export Income 1,984kWh x 0.00p = £0.00
In-house savings 1,984kWh x 22.29p = £442.27
Balance £-6,733.14
Year 11
FiT Generation 3,955kWh x 0.00p = £0.00
Export Income 1,978kWh x 0.00p = £0.00
In-house savings 1,978kWh x 23.41p = £462.88
Balance £-6,270.25
Year 12
FiT Generation 3,940kWh x 0.00p = £0.00
Export Income 1,970kWh x 0.00p = £0.00
In-house savings 1,970kWh x 24.58p = £484.21
Balance £-5,786.04
Year 13
FiT Generation 3,924kWh x 0.00p = £0.00
Export Income 1,962kWh x 0.00p = £0.00
In-house savings 1,962kWh x 25.81p = £506.26
Balance £-5,279.78
Year 14
FiT Generation 3,905kWh x 0.00p = £0.00
Export Income 1,952kWh x 0.00p = £0.00
In-house savings 1,952kWh x 27.10p = £529.02
Balance £-4,750.76
Year 15
FiT Generation 3,884kWh x 0.00p = £0.00
Export Income 1,942kWh x 0.00p = £0.00
In-house savings 1,942kWh x 28.45p = £552.48
Balance £-4,198.28
Year 16
FiT Generation 3,860kWh x 0.00p = £0.00
Export Income 1,930kWh x 0.00p = £0.00
In-house savings 1,930kWh x 29.87p = £576.64
Balance £-5,326.78
Year 17
FiT Generation 3,835kWh x 0.00p = £0.00
Export Income 1,917kWh x 0.00p = £0.00
In-house savings 1,917kWh x 31.37p = £601.48
Balance £-4,725.30
Year 18
FiT Generation 3,807kWh x 0.00p = £0.00
Export Income 1,904kWh x 0.00p = £0.00
In-house savings 1,904kWh x 32.94p = £626.97
Balance £-4,098.33
Year 19
FiT Generation 3,777kWh x 0.00p = £0.00
Export Income 1,889kWh x 0.00p = £0.00
In-house savings 1,889kWh x 34.58p = £653.10
Balance £-3,445.22
Year 20
FiT Generation 3,744kWh x 0.00p = £0.00
Export Income 1,872kWh x 0.00p = £0.00
In-house savings 1,872kWh x 36.31p = £679.83
Balance £-2,765.39
System 20 x Sanyo HIT N235SE10
Power 4.70kWp
Est Outlay £10,143.00
Feed-In & Savings £282.29pa
Pay back time 23y 8m
Profit over 20yrs £1,017.09
More Detailed calc »

Annual breakdown for a 4.70kWp system of 20 x 235Wp panels
Facing S @ 35° in a central UK location permits generation of 3,929kWh/pa

Year
FiT Generation
Export Income
In-house savings
Balance
Year 1
FiT Generation 3,929kWh x 0.00p = £0.00
Export Income 1,964kWh x 0.00p = £0.00
In-house savings 1,964kWh x 14.37p = £282.29
Balance £-9,860.71
Year 2
FiT Generation 3,929kWh x 0.00p = £0.00
Export Income 1,964kWh x 0.00p = £0.00
In-house savings 1,964kWh x 15.09p = £296.39
Balance £-9,564.32
Year 3
FiT Generation 3,928kWh x 0.00p = £0.00
Export Income 1,964kWh x 0.00p = £0.00
In-house savings 1,964kWh x 15.84p = £311.13
Balance £-9,253.18
Year 4
FiT Generation 3,926kWh x 0.00p = £0.00
Export Income 1,963kWh x 0.00p = £0.00
In-house savings 1,963kWh x 16.64p = £326.53
Balance £-8,926.65
Year 5
FiT Generation 3,923kWh x 0.00p = £0.00
Export Income 1,961kWh x 0.00p = £0.00
In-house savings 1,961kWh x 17.47p = £342.58
Balance £-8,584.07
Year 6
FiT Generation 3,918kWh x 0.00p = £0.00
Export Income 1,959kWh x 0.00p = £0.00
In-house savings 1,959kWh x 18.34p = £359.31
Balance £-8,224.76
Year 7
FiT Generation 3,912kWh x 0.00p = £0.00
Export Income 1,956kWh x 0.00p = £0.00
In-house savings 1,956kWh x 19.26p = £376.71
Balance £-7,848.05
Year 8
FiT Generation 3,905kWh x 0.00p = £0.00
Export Income 1,953kWh x 0.00p = £0.00
In-house savings 1,953kWh x 20.22p = £394.80
Balance £-7,453.25
Year 9
FiT Generation 3,896kWh x 0.00p = £0.00
Export Income 1,948kWh x 0.00p = £0.00
In-house savings 1,948kWh x 21.23p = £413.58
Balance £-7,039.67
Year 10
FiT Generation 3,885kWh x 0.00p = £0.00
Export Income 1,943kWh x 0.00p = £0.00
In-house savings 1,943kWh x 22.29p = £433.06
Balance £-6,606.61
Year 11
FiT Generation 3,873kWh x 0.00p = £0.00
Export Income 1,936kWh x 0.00p = £0.00
In-house savings 1,936kWh x 23.41p = £453.24
Balance £-6,153.37
Year 12
FiT Generation 3,858kWh x 0.00p = £0.00
Export Income 1,929kWh x 0.00p = £0.00
In-house savings 1,929kWh x 24.58p = £474.13
Balance £-5,679.25
Year 13
FiT Generation 3,842kWh x 0.00p = £0.00
Export Income 1,921kWh x 0.00p = £0.00
In-house savings 1,921kWh x 25.81p = £495.71
Balance £-5,183.53
Year 14
FiT Generation 3,823kWh x 0.00p = £0.00
Export Income 1,912kWh x 0.00p = £0.00
In-house savings 1,912kWh x 27.10p = £518.00
Balance £-4,665.53
Year 15
FiT Generation 3,803kWh x 0.00p = £0.00
Export Income 1,901kWh x 0.00p = £0.00
In-house savings 1,901kWh x 28.45p = £540.97
Balance £-4,124.56
Year 16
FiT Generation 3,780kWh x 0.00p = £0.00
Export Income 1,890kWh x 0.00p = £0.00
In-house savings 1,890kWh x 29.87p = £564.63
Balance £-5,229.55
Year 17
FiT Generation 3,755kWh x 0.00p = £0.00
Export Income 1,878kWh x 0.00p = £0.00
In-house savings 1,878kWh x 31.37p = £588.95
Balance £-4,640.60
Year 18
FiT Generation 3,728kWh x 0.00p = £0.00
Export Income 1,864kWh x 0.00p = £0.00
In-house savings 1,864kWh x 32.94p = £613.91
Balance £-4,026.69
Year 19
FiT Generation 3,698kWh x 0.00p = £0.00
Export Income 1,849kWh x 0.00p = £0.00
In-house savings 1,849kWh x 34.58p = £639.50
Balance £-3,387.19
Year 20
FiT Generation 3,666kWh x 0.00p = £0.00
Export Income 1,833kWh x 0.00p = £0.00
In-house savings 1,833kWh x 36.31p = £665.67
Balance £-2,721.52
System 18 x Sanyo HIT H250E01
Power 4.50kWp
Est Outlay £8,776.70
Feed-In & Savings £270.28pa
Pay back time 22y 6m
Profit over 20yrs £1,138.86
More Detailed calc »

Annual breakdown for a 4.50kWp system of 18 x 250Wp panels
Facing S @ 35° in a central UK location permits generation of 3,762kWh/pa

Year
FiT Generation
Export Income
In-house savings
Balance
Year 1
FiT Generation 3,762kWh x 0.00p = £0.00
Export Income 1,881kWh x 0.00p = £0.00
In-house savings 1,881kWh x 14.37p = £270.28
Balance £-8,506.42
Year 2
FiT Generation 3,762kWh x 0.00p = £0.00
Export Income 1,881kWh x 0.00p = £0.00
In-house savings 1,881kWh x 15.09p = £283.78
Balance £-8,222.64
Year 3
FiT Generation 3,761kWh x 0.00p = £0.00
Export Income 1,880kWh x 0.00p = £0.00
In-house savings 1,880kWh x 15.84p = £297.89
Balance £-7,924.75
Year 4
FiT Generation 3,759kWh x 0.00p = £0.00
Export Income 1,879kWh x 0.00p = £0.00
In-house savings 1,879kWh x 16.64p = £312.63
Balance £-7,612.11
Year 5
FiT Generation 3,756kWh x 0.00p = £0.00
Export Income 1,878kWh x 0.00p = £0.00
In-house savings 1,878kWh x 17.47p = £328.01
Balance £-7,284.11
Year 6
FiT Generation 3,752kWh x 0.00p = £0.00
Export Income 1,876kWh x 0.00p = £0.00
In-house savings 1,876kWh x 18.34p = £344.02
Balance £-6,940.09
Year 7
FiT Generation 3,746kWh x 0.00p = £0.00
Export Income 1,873kWh x 0.00p = £0.00
In-house savings 1,873kWh x 19.26p = £360.68
Balance £-6,579.41
Year 8
FiT Generation 3,739kWh x 0.00p = £0.00
Export Income 1,869kWh x 0.00p = £0.00
In-house savings 1,869kWh x 20.22p = £378.00
Balance £-6,201.41
Year 9
FiT Generation 3,730kWh x 0.00p = £0.00
Export Income 1,865kWh x 0.00p = £0.00
In-house savings 1,865kWh x 21.23p = £395.98
Balance £-5,805.43
Year 10
FiT Generation 3,720kWh x 0.00p = £0.00
Export Income 1,860kWh x 0.00p = £0.00
In-house savings 1,860kWh x 22.29p = £414.63
Balance £-5,390.80
Year 11
FiT Generation 3,708kWh x 0.00p = £0.00
Export Income 1,854kWh x 0.00p = £0.00
In-house savings 1,854kWh x 23.41p = £433.95
Balance £-4,956.85
Year 12
FiT Generation 3,694kWh x 0.00p = £0.00
Export Income 1,847kWh x 0.00p = £0.00
In-house savings 1,847kWh x 24.58p = £453.95
Balance £-4,502.90
Year 13
FiT Generation 3,678kWh x 0.00p = £0.00
Export Income 1,839kWh x 0.00p = £0.00
In-house savings 1,839kWh x 25.81p = £474.62
Balance £-4,028.28
Year 14
FiT Generation 3,661kWh x 0.00p = £0.00
Export Income 1,830kWh x 0.00p = £0.00
In-house savings 1,830kWh x 27.10p = £495.96
Balance £-3,532.32
Year 15
FiT Generation 3,641kWh x 0.00p = £0.00
Export Income 1,820kWh x 0.00p = £0.00
In-house savings 1,820kWh x 28.45p = £517.95
Balance £-3,014.37
Year 16
FiT Generation 3,619kWh x 0.00p = £0.00
Export Income 1,810kWh x 0.00p = £0.00
In-house savings 1,810kWh x 29.87p = £540.60
Balance £-4,072.34
Year 17
FiT Generation 3,595kWh x 0.00p = £0.00
Export Income 1,798kWh x 0.00p = £0.00
In-house savings 1,798kWh x 31.37p = £563.89
Balance £-3,508.45
Year 18
FiT Generation 3,569kWh x 0.00p = £0.00
Export Income 1,785kWh x 0.00p = £0.00
In-house savings 1,785kWh x 32.94p = £587.79
Balance £-2,920.66
Year 19
FiT Generation 3,541kWh x 0.00p = £0.00
Export Income 1,770kWh x 0.00p = £0.00
In-house savings 1,770kWh x 34.58p = £612.28
Balance £-2,308.38
Year 20
FiT Generation 3,510kWh x 0.00p = £0.00
Export Income 1,755kWh x 0.00p = £0.00
In-house savings 1,755kWh x 36.31p = £637.34
Balance £-1,671.03
These estimates are calculated by comparing a range of MCS certified panels to determine the best possible payback. Assuming that you pay 0.1437p per unit and that around 50% of the solar electricity that you generate will be used in your home.

Our Assumptions

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  • Illustrative solar PV performance figures only. Figures are given in good faith but do not constitute "Financial Advice".
  • Your property has an Energy Performance Certificate (EPC) rating of level D or better.
  • Photovoltaic Panels will not be shaded (e.g. by Trees or Buildings) as shading affects PV output.
  • Installation costs are based on industry averages for installation type/size. Every install is different and you should obtain 3 quotes.
  • Exact PV subsidy figures may depend on grants available at particular locations and other factors.
  • Yearly PV output uses a factored degradation over time based on industry estimates.
  • VAT is included (at 5% where appropriate) unless a new build is specified.
  • Exact equipment costs are estimated based on retail prices in 2012 and will vary by installer/supplier.
  • Assuming that you pay 0.1437p per unit and that around 50% of the solar electricity that you generate will be used in your home, without an export meter.
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