Sustainable Energy Engineering is a solar installer in Washington, Tyne and Wear, working for homes and businesses. The company describes itself as family-run and says it was founded in 2006. It is MCS certified for solar PV, battery storage and solar thermal (MCS certificate NIC-1036, checked on the MCS installer search on 25 September 2026).

Its work covers solar PV design and installation, battery storage, including battery retrofits, EV charger installation and the servicing of solar PV and battery systems. Its commercial solar PV work includes schools, community centres and churches. The company says it sizes each system to the roof and the customer's electricity use, that its own trade-qualified engineers carry out the installations and that it handles G99 grid-connection applications for larger systems.

Its case studies describe solar PV installations on homes in Tanfield, Darlington, Choppington, Sunderland, Low Fell and Gateshead, some of them with batteries. Equipment named in those write-ups includes LONGi and Canadian Solar panels and Fox ESS and SolaX batteries, and the company also installs the Tesla Powerwall 3.