Questions to ask your solar installer before signing.
The best questions are the ones prompted by your actual quotation. But there are several areas every homeowner should understand before paying a deposit.
What to check
- Is scaffolding included in the final price?
- Who handles the DNO application?
- What are the exact panel, inverter and battery models?
- What workmanship warranty is provided?
- How is my deposit protected?
- Which tariffs and usage assumptions drive the savings estimate?
Questions about the contract and deposit
RECC advises consumers not to pay more than 25% of the contract price up front and says deposits taken by members should be protected. Ask how yours is protected and get the answer in writing.
Questions about performance
Ask what annual generation is predicted and which assumptions have been used to convert that into cash savings. Those assumptions can materially change the apparent payback period.
References for this guide
We use relevant public consumer guidance and registers as reference points. These organisations do not endorse QuoteCalm and we do not use their logos as trust badges.
Guidance, prices and schemes change. Follow the linked source for the current position before relying on time-sensitive information.
Frequently asked questions
How much deposit should a solar installer ask for?
RECC advises consumers never to pay more than 25% of the contract price up front.
Should an installer give me a written performance estimate?
RECC advises consumers to obtain a written quote including a standard performance estimate specific to their property.
We aim to distinguish information stated in a quotation, calculations we can reproduce, public consumer guidance and things that cannot be known without a property-specific assessment. We do not accept payment from installers to change the outcome of a quote check.
More about QuoteCalm →Already have a solar quote?
Upload it and get an independent check before you sign. No phone number and no sales calls.