Questions to ask your solar installer before signing.
The most useful questions are the ones prompted by your actual quote. But there are a few areas every homeowner should understand before paying a deposit.
What to check
- Is scaffolding included in the final price?
- Who handles the grid connection application?
- What are the exact panel, inverter and battery models?
- What warranty covers the installation work?
- 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 what assumptions have been used to turn that into cash savings. Those assumptions can materially change the apparent payback period.
Sources for this guide
We use public consumer guidance and official registers where they help answer the question. These organisations do not endorse QuoteCalm and we do not use their logos as trust badges.
Guidance, prices and schemes can change. Follow the linked source for the latest position if the detail is time-sensitive.
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 keep a clear line between what a quote says, what can be calculated and what still needs checking. We do not accept payment from installers to change the outcome of a quote check.
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