Solar Panels & Boiler Grants — Frequently Asked Questions

Can I really get solar panels for free?

Through the ECO4 scheme, some qualifying households can get solar panels installed at no cost. This is typically available to low-income households receiving certain benefits. Even if you don’t qualify for a full grant, you may be eligible for a heavily subsidised installation. Check your eligibility →

How much can I save with solar panels?

A typical 4kW solar panel system can save you £400-£800 per year on electricity bills, plus £80-£200 in SEG export payments. Over 25 years, total savings can exceed £15,000. The exact amount depends on your roof orientation, system size, and energy usage patterns.

What is the ECO4 scheme?

ECO4 (Energy Company Obligation 4) is a government scheme running until March 2026. It requires large energy suppliers to fund energy efficiency improvements — including boiler replacements, solar panels, heat pumps, and insulation — for qualifying households. The scheme is worth over £4 billion in total funding.

Do I need to own my home to qualify for grants?

For most ECO4 grants, yes — you need to be the homeowner. However, private tenants may also qualify with their landlord’s permission. Social housing tenants should contact their housing association, as they often have their own energy efficiency programmes.

How long does a solar panel installation take?

A typical residential solar panel installation takes 1-2 days. The panels are fitted to your roof, the inverter is installed (usually in the loft or garage), and the system is connected to your electrical supply. Most installations cause minimal disruption.

What is the Smart Export Guarantee (SEG)?

The SEG is a government scheme that pays you for excess solar electricity you export to the grid. If your solar panels generate more electricity than you use, the surplus is sent to the grid and your supplier pays you for it — typically 1p to 15p per kWh. You need an MCS-certified installation and a smart meter to qualify.

How long do solar panels last?

Quality solar panels come with a 25-year performance warranty and typically last 30+ years. Inverters usually need replacing every 10-15 years. Battery storage systems typically last 10-15 years with a warranty of 5-10 years.

Do solar panels work in winter or on cloudy days?

Yes. Solar panels generate electricity from daylight, not just direct sunlight. While output is reduced in winter and on cloudy days (typically 10-25% of summer output), panels still generate meaningful amounts of electricity year-round. The UK has sufficient daylight for solar to be a worthwhile investment.

What size boiler do I need?

The right boiler size depends on your home:

An engineer surveying your home will recommend the exact size based on your heating needs, number of radiators, and number of bathrooms.

How long does a new boiler last?

A modern A-rated boiler typically lasts 10-15 years. With annual servicing and a good quality system (Worcester Bosch, Vaillant, Ideal), many boilers last 15+ years. ECO4 boiler installations come with a 7-10 year manufacturer’s warranty.

What is a combi boiler?

A combi (combination) boiler provides both central heating and hot water on demand, without needing a separate hot water cylinder or cold water tank. Combi boilers are the most popular type in the UK because they’re compact, efficient, and provide unlimited hot water.

Will I need planning permission for solar panels?

In most cases, no. Solar panels fall under permitted development rights in the UK, meaning you can install them without planning permission. Exceptions include listed buildings, properties in conservation areas, or if panels protrude significantly from the roof.

What if my roof isn’t south-facing?

South-facing roofs generate the most electricity, but east/west-facing roofs still perform well — generating about 80% of a south-facing roof’s output. North-facing roofs are generally not recommended for solar panels. Our advisors can assess your roof during a free survey.

How do I know if I qualify for an ECO4 grant?

You may qualify if you:

• Receive certain benefits (Universal Credit, Pension Credit, Income Support, etc.)
• Have a household income below £31,000
• Your home has a low EPC rating (D, E, F, or G)
• Your boiler is old and inefficient

Use our free 60-second assessment → to find out instantly.

Is there any obligation when I get a quote?

No. All quotes provided through our service are completely free and with no obligation. You can take the information and make your own decision in your own time. There’s no pressure and no commitment required.

How quickly can a boiler be installed?

If you qualify for an ECO4 boiler grant and your application is approved, installation typically takes place within 1-2 weeks. Emergency situations (no heating or hot water) can sometimes be fast-tracked.

Still have questions? Get your free quotes → and an advisor will answer any questions you have on a free, no-obligation call.