Used Generators
Quality used diesel generators, refurbished and load bank tested in-house before sale.
Overview
We supply quality used diesel generators, refurbished and load bank tested in-house before sale. A cost-effective alternative to new equipment, backed by the same installation, commissioning, and maintenance support. Working with leading manufacturers such as Marapco, FG Wilson, Caterpillar, Cummins, and MTU, we deliver the right generator, configured the right way, for every site.
Generators Available
Features
- Sized and specified to suit each application
- Single standby through to multi-set synchronising
- Open-set, canopied, or containerised configurations
- AMF, sync, and mains-parallel capability
- Latest-generation, emissions-compliant engines
Service & Maintenance
Every generator we supply is backed by comprehensive service and maintenance support, delivered by our own engineers across all the manufacturers we work with. From Marapco and FG Wilson to Caterpillar, Cummins, and MTU, we provide planned maintenance, reactive repairs, and emergency callout cover throughout the lifecycle of the equipment.
All servicing is carried out using genuine OEM parts and consumables, ensuring full warranty protection, manufacturer compliance, and long-term reliability — keeping your generator performing exactly as it was designed to.
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Our reviews
Hear first-hand from our incredible community of customers.
AC Automation has been a long-standing contract partner to NI Water for over 10 years. Providing goods and services 24/7, which includes planned and remedial maintenance. They provide generator hire and have provided support during major incidents.Their work helps keep our generator fleet available and well maintained, supporting the delivery of services to our customers.
Kieran HarkinSenior Contracts Manager, NI Water
AC Automation provides expert servicing and maintenance across our generator and electrical infrastructure, with a depth of capability spanning LV and HV systems and SCADA control. Their SCADA project at Belfast City Hospital has transformed how we manage our electrical estate and is now being replicated across the Trust.The team — from senior leadership through to the field engineers — are exceptional, and we are always treated as a priority customer.
Stephen LarmourSenior Estates Manager, Belfast City Hospital
AC Automation have provided Generator and associated Control Systems servicing, maintenance and repairs, together with new installations for the South Eastern Health and Social Care Trust Hospitals and Healthcare facilities for over 10 years. Their professionalism and ability to respond 24/7 provides us with confidence and reassurance that we can ensure continuity of essential critical infrastructure. AC Automation bring exceptional technical expertise and experience, are reliable and a welcome team member to solve problems at critical times.
Gerard MorelandSenior Estates Operations Manager, Ulster Hospital
AC Automation have provided the BHSCT with exceptional generator maintenance and control system development for over 20 years.
Their technical expertise, reliability, and proactive support have ensured the resilience and continuity of our critical infrastructure.
We highly value their professionalism and trust them as a key partner in maintaining essential services.
Jonny RaveyDivisional Estates Manager, Royal Group of Hospitals
Why Choose Us
From specification and supply through to installation, commissioning, and ongoing maintenance, every stage is delivered by our own engineering team. One supplier, one point of contact, one accountable team — for the lifetime of your generator.
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