Commercial solar savings calculator
Enter your electricity spend to estimate the system size, annual saving, payback and year-one tax relief for solar panels for landlords. Indicative only, not a quote.
Indicative estimate
- Recommended system
- 90 kWp
- Annual saving
- £23,940
- Simple payback
- 3.4 years
- Year-one tax relief (AIA)
- £20,250
- CO₂ saved
- 17.7 t/yr
- 25-year saving
- £598,500
Assumptions: ~950 kWh per kWp per year (UK average), install cost ~£900 per kWp, indicative system cost ~£900/kWp, exported units at a 5p Smart Export Guarantee rate, Annual Investment Allowance relief at 25% corporation tax. These are illustrative defaults; your figures depend on roof, shading, load profile, tariff and tax position. This tool does not store any data you enter.
Get a free solar quote for your let property
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- 1. Your property: its postcode, and roughly what you spend on electricity a year.
- 2. Your timing: when you want to go ahead, or that you are still researching.
- 3. Our reply: sent to your email address, no obligation.
Calculator FAQs
How accurate is this calculator?
It gives an indicative estimate from standard UK assumptions: roughly 950 kWh generated per kWp per year, a commercial install cost near £900 per kWp, and a 5p Smart Export Guarantee rate for exported units. Your real figures depend on your roof, orientation, shading, load profile and tariff. For a precise figure, half-hourly meter data should be modelled.
What is self-consumption and why does it matter?
Self-consumption is the share of solar you use on site rather than export. On-site use saves the full electricity price, while exported units earn only the lower Smart Export Guarantee rate, so a higher daytime load means a shorter payback. The slider lets you set your daytime usage share.
Does the estimate include tax relief?
Yes. Solar held in a limited company usually qualifies as plant and machinery, so the calculator shows indicative year-one Annual Investment Allowance relief at the 25% corporation tax rate. Your actual eligibility depends on your tax position and profits.
Is this a quote?
No. It is an indicative estimate to help you scope the opportunity. A real proposal needs meter data, a roof assessment and a grid check, which a feasibility study covers.