Planned maintenance, breakdown cover and repairs for diesel generators of every size, backed by 25+ years and a 16-strong engineer team. New and used sales and parts alongside it.





Maintenance comes first — it's what keeps a generator alive between the sales that only happen once a decade.
A 16-strong team of industry-trained engineers, 24/7/365 breakdown response, and corrective work carried out only when it's genuinely needed.
View maintenance plans →Our own sourced stock alongside new Rehlko generators, all with a 12-month parts and labour warranty as standard.
View sales →Mobile engineers equipped with generator spares for all major manufacturers, plus our full Rehlko parts catalogue.
Shop parts →Scheduled visits, remote monitoring and fuel testing, tailored to how hard your site runs its generator — from a single annual service to a full monitored contract.
New Rehlko generators alongside our own sourced new and used stock, across the full kVA range.
We supply new Rehlko generators alongside our own sourced stock, and we're the UK's largest distributor of Rehlko parts specifically — filters, alternators, control panels and aftermarket spares, sold through our dedicated parts store, generatorpowerparts.com.
Shop parts on generatorpowerparts.comMaintenance guidance, stock updates and industry news.
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"Response time on our breakdown call was under three hours. The engineer had the fault diagnosed and the site back up within the hour. "
"We've used TGS for maintenance contracts across four sites for six years. They only recommend work that's actually needed. "
"Free site survey, clear spec recommendation, and delivery ahead of schedule. Exactly what we needed for the new build. "
One form for maintenance bookings, sales questions, parts enquiries and everything else.
Mon–Fri 8am–6pm, with a 24/7/365 breakdown line for existing customers.