Solar, batteries, EV chargers, heat pumps. Calculators that give you a real number, write-ups of installs that have actually happened, and reference guides for the bit before you commit to anything.
Built for the questions that get asked while you are reading a quote. Type your numbers in, see what comes out.
Solar
Roughly how many years until panels break even, given your roof and tariff.
Battery
The smallest battery that catches most of your spare solar.
EV
Overnight smart-tariff charging compared to a standard rate.
Heat pump
A back-of-envelope check on the survey figure you have been quoted.
Battery · 14 min
Looked at the meter data, the tariff, the lot. The numbers landed somewhere different from the brochure.
Solar · 9 min
South-east at the front, north-west at the back. The decision came down to a single piece of kit.
EV · 11 min
First few months on the tariff, with bills before and after. A couple of surprises.