Cost of Generator Sales and Installation
across the UK

# Generator Sales and Installation Accreditation

In the UK, several trade bodies and regulatory schemes oversee generator sales and installation. The main ones include the Institute of Engineering and Technology (IET), which sets standards for electrical installation work; CIBSE (the Chartered Institution of Building Services Engineers), which provides guidance on mechanical and electrical systems; and various manufacturer-specific certifications such as those from Caterpillar, Kohler, and other leading brands. Additionally, many installers hold Gas Safe Registration if they work with gas-powered generators, and NAPIT or ELECSA accreditation for electrical work. These bodies ensure that engineers meet competency standards, follow safety regulations, and use proper installation practices. Understanding which accreditations are relevant to your specific generator type—whether diesel, petrol, LPG, or natural gas—helps you identify providers who can legally and safely complete the work.

To verify a provider's credentials, check their relevant trade body's online register directly rather than relying solely on claims on their website. Gas Safe and NICEIC registrations can be searched on the official Gas Safe Register and NICEIC websites respectively, where you will see their registration number and the scope of work they are certified to perform. For manufacturer certifications, contact the manufacturer or ask the installer for proof of current training certificates. It also pays to check how recently they were accredited—many bodies require annual renewal or periodic audits, so current accreditation is more meaningful than historical recognition. This verification matters because it confirms the installer has demonstrated technical knowledge, carries appropriate insurance, and is subject to standards monitoring and complaints procedures if something goes wrong.

Accredited generators installers typically charge more than non-accredited alternatives, often by 10 to 20 per cent, because they incur costs in maintaining their accreditation, undertaking ongoing training, and carrying professional indemnity