Solar, batteries, EV chargers and heat pumps. Mostly we cover what is worth knowing before you book an install, with rough numbers on each. Written for UK houses.
Calculators
Built for the kinds of questions that crop up while you are reading a quote. Each one prints the working it does to reach the number.
Years to break even on the panels, given your roof orientation, tariff and rough behaviour.
Try it →Smallest battery that catches most of your spare solar without paying for unused capacity.
Try it →Overnight smart-tariff charging compared against a standard rate. Home losses kept in.
Try it →Sanity-check on a survey figure you have been quoted. Not a substitute for the real survey.
Try it →Topics
Independent UK guides on the four bits of kit that make up a modern home energy setup. Each topic page pulls together the basics, the deeper guides and the calculators relevant to it.
Panels, inverters, mounting and what the install day actually looks like.
Sizing, chemistry, hybrid systems, payback and virtual power plants.
Home chargers, smart tariffs, load balancing and public network reliability.
Air source, ground source, the survey, the radiator question and the BUS grant.
Deeper reference pages on the kit, the install process and the regulations. Start at a topic or dip in via the article archive.
Articles
Longer pieces on installs and decisions that have actually happened, with the numbers underneath them.
A look at the meter data after twelve months. Payback came in earlier than the spreadsheet expected.
South-east at the front, north-west at the back. The decision came down to one specific bit of kit.
A semi in West Yorkshire. The 14 kW survey was wrong. How to tell when yours is too.