Generator Services in London

Generators London offers a complete range of commercial generator services across Greater London. From short-term hire for a building site to a long-term planned maintenance contract for a critical facility, our CompEx-certified engineers deliver safe, documented, code-compliant work on every job.

Trading since 2009, we have built our reputation on technical accuracy, fast response times and transparent pricing. Below is a summary of each service we offer, with links to the full detail pages.

Diesel Generator Hire London

Our hire fleet covers 20 kVA to 1,000 kVA diesel generating sets. We supply units for construction sites, events, emergency standby cover and business continuity during planned outages. All hire sets are fully serviced before dispatch, fuel tanks are pre-filled, and a commissioning check is carried out on delivery.

Short-term daily hire and long-term contract rates are both available. Fuel management services can be added to any hire agreement. Get a Free Generator Survey for your hire requirement.

Generator Installation London

We design and install standby and prime power generating systems for commercial, industrial and public sector sites across London. Our engineers carry out a full load assessment before specifying equipment, and every installation is completed to BS 7671 with an automatic transfer switch and full as-built documentation.

We install all major generator brands and can source equipment from multiple suppliers to meet your budget and specification. Request a Free Generator Survey for your installation project.

Generator Servicing and Maintenance

A generator that is never tested will fail when the power goes out. Our planned preventive maintenance contracts keep your set in first-start condition, with service visits aligned to manufacturer recommendations and full written reports after every visit. We cover all makes and models, including sets we did not install.

Service records are issued in a format suitable for compliance audits and insurer requirements. Book a Generator Service today.

Emergency Generator Repair London

Our 24/7 emergency breakdown line connects you directly to a qualified engineer. We aim for a four-hour on-site response across Greater London, and our vehicles carry a full complement of consumables and common spare parts to resolve most faults on the first visit. We work on all brands and all kVA ratings.

Call 0800 000 0000 now for emergency generator repair.

Load Bank Testing London

Load bank testing is the only way to confirm that a generator can carry its full rated load under real operating conditions. We use resistive and reactive load banks to test sets to 100% output, check the automatic transfer switch operation, and identify wet stacking or fuel system issues before they cause a failure. A signed test certificate is issued on the same day.

Book Load Bank Testing for your site.

Frequently Asked Questions

Do you work with commercial and industrial clients only?

Commercial and industrial clients are our primary market. We work with facilities managers, main contractors, data centres, NHS trusts, hospitality groups, retail chains and manufacturing sites. We do not carry out domestic generator work. If you are unsure whether your site qualifies, call 0800 000 0000 and speak to an engineer.

How do I get a price for generator hire or installation?

The fastest route to a price is a free site survey. One of our engineers visits your site, assesses the load, reviews access, and produces a written quote within 24 hours. For hire requirements where a site visit is not possible, we can quote based on a load schedule and site photos. Call 0800 000 0000 to get started.

Are your engineers qualified to work on critical sites?

Yes. Our lead engineers hold CompEx certification, which is the recognised standard for work in potentially explosive atmospheres. We also carry full public liability insurance and all work is completed to BS 7671. We regularly work on NHS, pharmaceutical, data centre and food production sites with strict permit-to-work requirements.

Can you take over a maintenance contract from another supplier?

Yes. We take on inherited maintenance contracts for generators of any age and brand. We carry out an initial condition survey to establish the current state of the set, then agree a forward service schedule. All historical service records are retained and we issue new documentation from the first visit onwards.