PS
Solar ROI calculator
Phoenix Solar & Electrical · phoenixsolar.uk
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Which way does your roof face?
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Shed dimensions
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Monthly electricity bill (£)
We target covering approx. 65% of your annual bill with solar generation
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Your price per kWh
£/kWh
Default £0.25/kWh — UK average 2024–25. Check your bill for your exact rate.
Your estimated results
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Estimated annual saving (generation + export)
Bill coverage from solar
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System size (kWp)
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Annual generation (kWh)
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Estimated install cost
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Simple payback period
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Net return over 10 yrs
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Net return over 25 yrs
Estimates use UK standard yield figures. South-facing: ~950 kWh/kWp/yr. East/West blended: ~870 kWh/kWp/yr. Usable area: 50% of roof footprint for south, 100% for east/west. 1 m² = 195 Wp. Generation value: 65% self-consumed at your kWh rate, 35% exported at £0.08/kWh (Smart Export Guarantee). Install cost £0.97/Wp. Indicative only — a site survey will confirm final figures. © Phoenix Solar & Electrical.