Harness the sun’s rays to generate free electricit y – and store it in a battery for use when you need it

Most modern homes boast energy efficient features – whether thanks to clever orientation, a super insulated and airtight fabric, renewable heat generation or a combination of factors. “However, your electricity consumption typically stays the same,” says Yen Dai, director at Eco Energy Environment. “You’re still using the kettle, microwave or hairdryer just as much, and with more self builders opting for heat pumps, MVHR and electric vehicles, your electricity bills may even increase.” So, it can make sense to incorporate photovoltaic (PV) panels to generate as much of this energy as you can on site, rather than paying for it from the grid.

How does it work?

Photovoltaic generation takes energy from light (photons) and transforms it to electricity (volts), hence the name. A panel consists of several modules of photovoltaic cells – and you’ll likely have an array of several panels. A typical domestic PV system is around 4kWp (kilowatt peak), and panels for this would take up around 25m 2of the roof. “It makes sense to specify an in-roof system,” says Yen. “This looks better on your house, allows you to save money on buying roof tiles, and protects your panels from wildlife that like to nest underneath mounted solar panels.” Companies such as TBS and Tesla also offer solar PV tiles that can form a near-invisible part of your roof covering. “Aesthetically pleasing integrated solar panel systems are an ideal solution,” says Marley’s Stuart Nicholson. “Modern panels offer superior aesthetics, speedy installation and improved output.”