Cornwall solar · estimate in seconds

See what solar could save your home

Answer a few quick questions about your roof and how you use electricity, and we'll estimate your annual saving, payback time and 25-year return — using current 2026 figures.

Your home

Which way does your main roof face?

South-facing roofs generate the most. Not sure? Pick the closest.

Any shading? (trees, chimneys, other buildings)

When is someone usually home?

The more electricity you use while the sun's up, the more you save.

System size 4.0 kWp

Your electricity use

Don't know? Leave it — we use a typical Cornish household (3,500 kWh/yr).

What solar could do

9.5 yrs

to pay for
itself

£753

saved in year one

£10,899

net saving over 25 yrs

14.4 t

CO₂ avoided (25 yrs)

When it breaks even

Cumulative savings What it cost to install

Like the look of that? Dowrick Electrical are NICEIC-approved installers in St Austell — get a proper quote for your roof.

Request a quote 01726 65499 Email us

Assumptions & figures used ▾

This is an estimate, not a quote — every home is different. Below are the figures behind the numbers, all from 2026 sources. Adjust any of them and the results update instantly.

Region yield

kWh generated per kWp each year. MCS irradiance bands; Cornwall sits at the top of the UK range.

Electricity price

p / kWh

Import unit rate. Every kWh you use from your own panels saves this.

Export (SEG) rate

p / kWh

Paid for surplus sent to the grid. Varies by tariff — 15p is a solid mid-market default.

Install cost

£/ kWp

Typical UK installed cost per kWp, 2026. Dowrick will confirm the real figure for your roof.

Grid CO₂ factor

kg / kWh

DESNZ 2026 grid electricity factor (approx). Used for the CO₂ figure only.

Daytime electricity use

Share of your electricity used in daylight, when panels produce — set by your occupancy choice, overridable here. Self-consumption is capped at a realistic 65% of generation (no battery).