Solar Panel Installation in Epsom

Using our current guide prices, a typical 4kW system for a three-bedroom semi in Epsom or Ewell costs between £6,500 and £8,000, and a 5kW system for a larger family home costs between £7,500 and £9,500. Adding a battery usually adds £3,000 to £6,000. The final price depends on the number of panels, your choice of equipment, how easy scaffold access is and whether any electrical upgrades are needed. Solar panel installations on homes are currently zero-rated for VAT, and we give you a fixed quote after a free survey. You can read more in our guide to 0% VAT on solar panels.

In most cases, no. Epsom and Ewell Borough Council confirms that solar panels are permitted development under Part 14 of the national permitted development rules, as long as they meet certain conditions — for example, panels on a pitched roof should not project more than 0.2 metres from the roof surface or sit higher than the highest part of the roof. Rules are tighter in conservation areas, where panels on a wall facing the road are not permitted development. Solar panels on a listed building, or within its curtilage, fall outside these rights and will need consent. We check your property’s status as part of our free survey.

Yes, many homes in the borough’s 21 conservation areas can have rooftop solar. Areas such as Epsom Town Centre, Church Street, Ewell Village, Stamford Green and the Hospital Cluster are protected for their historic character, so we pay close attention to where panels are placed. Rear or side roof slopes that are not visible from the street are usually the best option, and all-black panels with discreet mounting help them blend in. If your home is also listed, you will need listed building consent. We will tell you at the survey stage what, if anything, needs to be submitted to the council.

There is no national grant that pays for solar panels on most homes, but there are ways to reduce the cost. Residential installations currently benefit from 0% VAT, and the Smart Export Guarantee pays you for surplus electricity. Epsom and Ewell Borough Council has also promoted the Solar Together group-buying scheme, which offers registered households a fixed price from its selected installer during each campaign. Some households on lower incomes may qualify for support through energy company schemes. Our guide to solar grants and schemes covers the options in more detail.

A 4kW system on a well-orientated Epsom roof typically generates around 3,400 to 3,700 kWh a year. How much that saves depends on how much you use yourself: a household that is home during the day, or that has a battery, will use far more of its own solar power than one that is out until the evening. Savings come from two places — electricity you no longer buy from the grid, and payments for what you export. We base our savings estimate on your actual bills rather than a generic figure.

The 20% rule is an informal rule of thumb rather than an official regulation, and it is used in different ways. Most often it means sizing a system about 20% larger than your current annual electricity use, to allow for cloudy years, gradual panel ageing and extra demand from things like an electric car. Others use it to mean keeping your panels’ output above 80% of their rated power over their life. It is a useful starting point, but the right size for your home depends on roof space, budget and whether you plan to add a battery or heat pump.

Buyers are increasingly interested in running costs, and a well-installed, owned solar system with its MCS certificate and warranties can be a selling point. Problems usually arise with older rent-a-roof arrangements, where a third party owns the panels and leases the roof space, which can complicate mortgages. Systems that you buy outright do not have this issue. When you sell, simply pass on the MCS certificate, warranty documents and installation paperwork to your buyer.

Yes. Solar panels generate electricity from daylight, so they continue to produce power on overcast days, just at a lower level than in bright sunshine. Output is highest from late spring to early autumn and lower in winter, when days are short and the sun is lower in the sky. Our generation estimates for Epsom already take seasonal changes into account, so the figures in your proposal reflect a realistic year rather than just summer performance.

Modern panels are designed for a long working life. Most manufacturers offer a performance warranty of around 25 years, and many systems continue generating well beyond that, with only a gradual drop in output. The inverter, which converts the power for use in your home, usually has a shorter life and may need replacing once during the lifetime of the panels. Beyond an occasional visual check, solar panels need very little maintenance.

The Smart Export Guarantee requires larger electricity suppliers to pay households for solar electricity they send back to the grid. You choose which supplier’s export tariff to join, and rates vary widely, currently typically from about 4p to 15p per kWh. You need an MCS-certified installation and an export-capable smart meter. The best-paying tariffs are sometimes tied to also buying your electricity from the same supplier. Find out more in our Smart Export Guarantee guide.

Yes. Many Epsom homeowners start with panels and add storage later once they have seen how much electricity they export. When we design your system, we plan for future expansion, so adding a battery later is usually a straightforward job. If you think you are likely to want storage within a few years, we can also suggest a hybrid inverter so that a battery can be connected without replacing equipment.

Call us on 01273 455 695 or send us an enquiry online. We will arrange a convenient time to visit your home in Epsom, Ewell or the surrounding area, carry out a free survey and then send you a clear, fixed-price proposal. There is no obligation to proceed.