Can panels be installed in winter?

Yes — installation happens year-round. Panels are mounted in any weather. The only delays: heavy rain (electrical connections), very high winds (scaffolding safety), or snow-covered roofs (access). These cause 1-2 day delays at most.

Will I miss summer if I install in autumn?

You'll miss THIS summer's peak, but you gain every summer for the next 25-30 years. Missing one summer costs £200-£300 in generation. Waiting until spring costs another £300-£500 in total missed savings.

Do installers offer winter discounts?

Some do — January is typically the quietest month. Discounts of 5-10% are sometimes available. But even without discounts: the savings from installing sooner outweigh any seasonal discount from waiting.

How long from enquiry to generating?

Typical timeline: enquiry to quotes (1-2 weeks), decision (your pace), survey to installation (2-6 weeks). Total: 4-10 weeks. Rush installations: some installers offer 2-3 week turnaround.

Best Month to Install Solar

By Home Solar Guide Team|Updated 18 March 2026|guide

Independently written | Evidence-based | Sources cited

Best month solar — January-March: shortest wait times. But any month is good — every day waiting costs money.

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When is the best time to install solar panels?

Best month to install solar panels in the UK: JANUARY-MARCH: Shortest installer wait times (quieter season). System ready for peak solar months (April-September). Saves the most in year one. APRIL-JUNE: Most popular time to install (high demand). Wait times: 4-8 weeks. You capture summer generation but may miss peak months. JULY-SEPTEMBER: Still good — catches late summer and autumn generation. Installers busy but available. OCTOBER-DECEMBER: Shortest days, lowest output. But: cheapest quotes (some installers offer winter discounts) and shortest wait times. TRUTH: There is no bad month. Every month of delay costs £50-£90 in missed savings. The best time to install solar was yesterday. The second best time is today. Don't wait for spring, don't wait for summer, don't wait for prices to drop. Act now.

Frequently Asked Questions

Related: Home Heating Systems

Solar panels are most powerful when combined with an efficient heating system. Heat pumps use solar-generated electricity to heat your home at 300-400% efficiency — making them the ideal partner for solar.

heat pump running costs in the UK

Heat pumps use electricity at 300-400% efficiency, making them ideal partners for solar.

From our sister site Home Heat Pump Guide