Comparing solar quotes isn’t just about finding the cheapest price. A low-cost quote can mean cheaper panels that degrade faster, an inverter with a short warranty, or an installer who won’t be trading in three years when you need warranty support.
Here are the seven things to check on every solar quote you receive — before you sign anything.
Before reading anything else on a solar quote, confirm the installer holds current MCS (Microgeneration Certification Scheme) accreditation. This is not optional. Without MCS certification
Verify the installer’s MCS certificate at mcscertified.com/find-an-installer. If they can’t provide a current certificate number, walk away.
Not all solar panels are equal. The quote should specify the panel brand, model, wattage, and warranty terms. What to look for:
If a quote doesn’t name the panel brand, ask. If the answer is vague, that’s a red flag.
The inverter converts DC electricity from your panels into AC electricity your home uses. It’s the component most likely to need replacement during the system’s life. Check:
The quote should state the system size in kWp and the estimated annual output in kWh. Check:
Ensure the quote includes everything required for a working system. Common extras that should be included but are sometimes quoted separately:
Any MCS-certified installation should qualify for SEG. But ask the installer to confirm in writing that the installation will be SEG-eligible upon completion. This should be standard — if they seem unsure, that’s a warning sign.
Ask these questions before signing:
The most common mistake UK homeowners make is getting one quote and accepting it because the price seems reasonable. You have no way of knowing if one quote is fair without comparing it.
SolarForYou connects you with up to three MCS-certified solar installers in your area simultaneously. You get three quotes to compare, and you accept none, one, or all of them — entirely on your terms.
Check MCS accreditation, panel brand and warranty, inverter type and warranty, estimated annual output, all-inclusive pricing, SEG eligibility confirmation, and aftercare support. Never compare on price
A standard 4kWp system costs between £6,500 and £9,000 installed in 2026. If you receive a quote significantly below £6,000, ask about the panel and inverter brands — cheaper quotes often use lower-quality components.
Key red flags: installer won’t provide MCS certificate number, panel brand is not named, output estimate seems unusually high, price is significantly below market rate, heavy pressure to sign quickly, quote doesn’t include scaffold or electrical connection works.
Vaibhav Sharma
