Seven Questions to Ask Before Choosing a Solar Installer

Installing solar panels is a big decision, and choosing the right installer is just as important as choosing the equipment.

Most homeowners aren’t solar experts, and nobody expects you to be. A good installer should explain everything clearly, answer your questions and give you enough time to consider your options without making you feel pressured.

If you’re comparing solar companies, here are seven useful questions to ask before making your decision.

1. Are you MCS certified for solar PV?

 

MCS is the recognised UK quality mark for small-scale renewable-energy installations.

Choosing an installer that is MCS certified for solar PV gives you confidence that the company has been assessed against recognised technical and quality standards. An MCS certificate may also be required if you want to receive payments for electricity exported to the grid through the Smart Export Guarantee.

Don’t be afraid to ask for the installer’s certification details. You can also check the company yourself using the official MCS installer register.

Remember that certification should cover the specific technology being installed—not simply another service the company provides.

2. Do you belong to an approved consumer-protection scheme?

 

Ask whether the installer belongs to an approved consumer code, such as the Renewable Energy Consumer Code.

These schemes are designed to give customers additional protection throughout the sales and installation process. Their rules cover areas such as quotations, contracts, deposits, advertising, cancellation rights and complaint handling.

A reputable installer should be able to explain which scheme they belong to and what protection it provides.

It’s also sensible to read the terms carefully before signing anything. If there is something you don’t understand, ask for it to be explained in plain English.

3. Will you carry out a proper survey of my property?

 

Every home is different, so a solar installation should be designed around the property and the people living in it.

Before making a final recommendation, the installer should consider factors such as:

• The size, condition and orientation of the roof.
• Any shading from trees, chimneys or nearby buildings.
• The property’s electrical system.
• How much electricity the household uses.
• When that electricity is normally used.
• Whether battery storage would be suitable.
• Where the inverter, battery and other equipment could be positioned.

Be cautious if someone recommends a system without gathering enough information about your home or energy use.

A proper survey helps the installer design a suitable system and provide a more realistic estimate of its likely performance.

4. What exactly is included in the quotation?

 

A solar quotation should clearly explain what you are paying for.

Ask for a written, itemised quote that covers the full installation, including:

• The make, model and number of solar panels.
• The inverter and any battery storage.
• Mounting equipment.
• Scaffolding and access.
• Electrical work.
• Monitoring equipment or apps.
• Testing, registration and certification.
• Warranties and aftercare.
• Any work that is not included in the price.

This makes it easier to compare quotations fairly. One quote may appear cheaper simply because something important has been left out.

The cheapest system isn’t automatically the best choice, just as the most expensive one isn’t necessarily the right one. What matters is whether the proposed system is safe, suitable and clearly explained.

5. What performance can I realistically expect?

 

Solar panels can reduce the amount of electricity you need to buy from the grid, but their performance depends on several factors.

These include the system’s size, the direction and angle of the roof, shading, local weather conditions and how much of the generated electricity you can use at home.

Your installer should provide a performance estimate that is specific to your property and explain how it was calculated. They should also be clear that an estimate is not a guarantee.

Be wary of anyone promising that your bills will disappear or offering unusually high savings without explaining the assumptions behind the figures.

A trustworthy installer will give you a realistic picture—including the limitations—so you can make an informed decision.

6. Who will carry out the installation?

 

It’s useful to know who will actually arrive at your property on installation day.

Some companies use their own employed installation teams, while others subcontract some or all of the work. Subcontracting is not necessarily a problem, but the arrangement should be clear.

Ask:

• Who will be responsible for the installation?
• Are the installers appropriately qualified?
• Who should you contact if you have a question or concern?
• Which company is responsible for putting any problems right?
• How will your property be protected while the work takes place?

You should always feel comfortable about who is working in your home and who remains accountable once the installation is complete.

7. What warranties and aftercare will I receive?

 

Solar panels are designed to operate for many years, so support shouldn’t end as soon as the installation team leaves.

Ask what warranties are provided for the panels, inverter, battery and workmanship. Check how long each warranty lasts, who provides it and what you would need to do if something went wrong.

It’s also worth asking about:

• Insurance-backed protection.
• System monitoring.
• Help with using the monitoring app.
• What happens if the system stops generating as expected.
• Who to contact with future questions.
• Any servicing or maintenance recommendations.

Keep copies of your contract, warranties, certificates and handover information somewhere safe.

Take your time and trust your instincts

 

A good solar installer won’t mind you asking questions. They should be happy to explain their recommendation, provide clear information in writing and give you time to make your decision.

It’s sensible to obtain more than one quotation so you can compare the proposed equipment, system design, expected performance, warranties and overall service—not just the final price.

Be cautious if you’re offered a discount that is only available if you sign immediately, or if you feel pressured into paying a deposit before you are ready. Solar is a long-term investment, and you should feel confident and comfortable at every stage.

At ASK Renewables, we believe good advice should be straightforward, honest and based on the needs of each individual property. Whether you’re ready to install solar or are simply exploring the options, asking the right questions is the best place to start.