General information, not legal, electrical or financial advice. Confirm current rules before you buy or connect anything.
Be Wise logoBe Solar Wise

Be Wise › Solar Wise guides › Solar FAQs › Choosing a solar installer

Choosing a solar installer: 6 questions answered

MCS certification, consumer codes, deposits, cancelling a contract, guarantees and the paperwork you should get after installation.

New to this topic? Start with our guide: Choosing a good installer.

Reviewed · fast-moving answers are re-checked against the official pages listed every week

Rules are changing quickly. Every answer lists its sources and when it was last reviewed. General information, not legal, electrical or financial advice. See how we check and what has changed recently.

How do I choose a solar installer?

The Energy Saving Trust recommends getting at least three quotes from MCS-certified installers. Businesses carrying out MCS installations must belong to one of two consumer codes approved by the Chartered Trading Standards Institute, the Renewable Energy Consumer Code (RECC) or HIES, which give you access to alternative dispute resolution if something goes wrong. Check the certification yourself on the MCS website rather than relying on a logo.

Sources: Energy Saving Trust: Battery storage · Business Companion (Chartered Trading Standards Institute): how to become a certified installer

Reviewed 2 October 2026

How much deposit can a solar installer ask for?

Under the Renewable Energy Consumer Code, a deposit must not be more than 25% of the estimated cost, and deposits and other advance payments together must not be more than 60%. Deposits and advance payments must be insured, so the work can be completed by another member if the business fails. Check which consumer code your installer belongs to, because HIES sets its own rules.

Sources: Renewable Energy Consumer Code (RECC), version 9, July 2026 (PDF)

Reviewed 2 October 2026

Can I cancel a solar panel contract?

The Renewable Energy Consumer Code says that for contracts made away from the business's premises, for example in your home, you have 14 days to cancel without penalty, running from the date the last of the goods is delivered. Members must not install during that period without your express written permission and must refund your money within 14 days of cancellation.

Sources: Renewable Energy Consumer Code (RECC), version 9, July 2026 (PDF)

Reviewed 2 October 2026

What paperwork should I get after a solar installation?

The Renewable Energy Consumer Code requires members to hand over full operating and maintenance instructions and signed commissioning records, including the MCS certificate, a compliance certificate and the invoice, and says these cannot depend on you paying in full. You should also get confirmation that your network operator has been notified, and the warranties for the panels, inverter and any battery.

Sources: Renewable Energy Consumer Code (RECC), version 9, July 2026 (PDF) · MCS: notifying distribution network operators (G98 and G99)

Reviewed 2 October 2026

What guarantee should I get on a solar installation?

Members of the Renewable Energy Consumer Code must give a workmanship guarantee of at least 2 years at no extra cost, which transfers to a new owner and is backed by insurance in case the installer stops trading. Panels, inverters and batteries also come with manufacturers' warranties, which do not reduce your rights under the Consumer Rights Act.

Sources: Renewable Energy Consumer Code (RECC), version 9, July 2026 (PDF) · Business Companion (Chartered Trading Standards Institute): how to become a certified installer

Reviewed 2 October 2026

Can a solar installer pressure me to sign on the day?

Members of the Renewable Energy Consumer Code must not use selling techniques designed to pressure you into an immediate decision. The code bans, for example, visits lasting more than two hours, inflated prices followed by a sudden 'discount', and unrealistic projections of future energy prices. Be wary of any installer who does these things.

Sources: Renewable Energy Consumer Code (RECC), version 9, July 2026 (PDF)

Reviewed 2 October 2026

Want answers for your situation?

The Be Solar Wise app lets you choose your part of the UK and ask SolarBot follow-up questions.

Open Be Solar WiseAll FAQs

Reviewed 2026-10-02. General information, not legal, electrical or financial advice. Confirm current rules before you buy or connect anything.