Founded in 2023, Brimstone Energy Limited is based in Hemingford Grey and works for homes, community buildings and businesses across Cambridgeshire and the surrounding area. It is MCS certified for solar PV and battery storage (MCS certificate NIC-601921, checked on the MCS installer search on 25 September 2026) and is a member of the Home Insulation and Energy Systems (HIES) consumer code, confirmed in HIES's installer search on 25 September 2026.

It installs solar PV and battery storage, heat batteries and air source heat pumps; its MCS listing covers solar PV and battery storage. It also carries out Energy Performance Certificate assessments and heat loss surveys, and coordinates whole-house retrofits covering insulation, windows and heating.

The company says it assesses a property's energy performance and heat loss before designing a combined system, and that it coordinates the installation with other trades on site. It handles the DNO paperwork, advises on off-peak electricity tariffs, and provides app-based monitoring support and annual maintenance. Brands it installs include Enphase, GivEnergy and Tesla Powerwall.

Its case studies include a Cambridge home where a heat battery replaced gas heating alongside solar panels and a battery, an 8 kWp solar and 15 kWh battery system on a Cambridgeshire home, and solar PV with battery storage at a rugby club in St Ives.