Tools

Commercial Feasibility

A high-level model for a commercial rooftop scheme. It is deliberately simple — its job is to tell you whether a proper feasibility study is worth commissioning.

Inputs

Your site

Usable roof area (m²)

Cost per kWp (£)

Import rate (p/kWh)

Export rate (p/kWh)

Self-consumption: 70%

The share of generation consumed on site. Daytime-heavy operations sit high; weekday offices with summer shutdowns sit lower.

Result

Indicative commercial feasibility

A screening-level model from the inputs on this page. Indicative only — not a quotation, feasibility study or guaranteed return.

Indicative system size250 kWp

Annual generation: 225,000 kWh
Indicative capex: £187,500
Annual benefit: £43,200
Simple payback: 4.3 yrs
CO₂ avoided: 46.6 t/yr

Assumptions and caveats

Approximately 6 m² of roof per kWp, 900 kWh per kWp per year, and no allowance for structural works, grid reinforcement, roof condition or finance costs. Simple payback ignores inflation, degradation and maintenance. Capex, savings and payback are indicative and not guaranteed.

Recommended next action

If the screening case looks viable, the next step is a proper feasibility study using half-hourly consumption data, a structural view of the roof and a grid capacity check. Installation work is delivered by our network of MCS-certified installation partners.

Continue to commercial enquiry

Next step

Send us the site and we will model it properly

Your figures above are passed through with the enquiry, so we start from what you have already modelled.

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Commission a proper feasibility study

We use half-hourly consumption data, a structural view of the roof and a real grid capacity check.

Talk to our commercial team Commercial solar

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