Payback periods, the Smart Export Guarantee, battery pairing — everything a Hertfordshire homeowner needs to know before getting solar quotes.
With energy bills still high and solar panel costs continuing to fall, 2026 is shaping up to be one of the best years to go solar. But is it right for your home? Here's everything a Hertfordshire homeowner needs to know before getting quotes.
A standard 4kWp solar panel system for a three-bedroom home typically costs between £5,000 and £8,000 installed. Add a battery storage system and you're looking at £8,000 to £14,000 for the complete package. These prices have fallen significantly over the last decade and continue to drop as panel efficiency improves.
The payback period depends on your energy usage, your roof's orientation, and whether you add battery storage. A typical south-facing roof in Hertfordshire with a 4kWp system and 10kWh battery can expect to save £900 to £1,400 per year on electricity bills. At those savings, payback typically comes in at 7 to 10 years — and panels carry a 25-year performance warranty.
Any excess electricity your panels generate that you don't use gets exported back to the grid. Under the Smart Export Guarantee (SEG), your energy supplier pays you for every unit you export. Rates vary by supplier but typically sit between 4p and 15p per kWh. MCS certification — which Zeno Electrics holds — is required to access the SEG.
Solar panels generate electricity during the day. If you're out at work, much of that generation gets exported rather than used. A home battery stores the daytime generation so you can use it in the evening and overnight, dramatically increasing your self-consumption and reducing your grid dependency.
South-facing roofs with minimal shading give the best yield, but east and west-facing roofs still perform well. A site survey will assess your roof's orientation, pitch, available area, and any shading from chimneys, trees, or neighbouring buildings. At Zeno Electrics, our site surveys are completely free and no-obligation.
Get a free solar survey: If you're considering solar for your home or business in Hertfordshire or Greater London, get in touch with the Zeno Electrics team. We'll carry out a free site assessment and give you a fixed-price quote with no pressure and no obligation.