400 kW Generators for Sale

Capacity for Sites That Run Around the Clock

Once an operation depends on continuous production, refrigerated stock, or systems that cannot be allowed to drop, the question stops being whether to fit a generator and becomes how much capacity to install. A 400 kW generator answers that for facilities where a whole site, not a handful of circuits, has to stay live. Our 400 kW diesel generators are specified for demanding duty cycles, holding their rated output through sustained running rather than tailing off once the load settles in for the long haul.

Within the trade, the terms blur, and a 400 kW genset means precisely the same machine as a generator. As a leading stockist carrying a substantial range of generators in our own inventory, we can usually allocate a 400 kW diesel genset to a project and have it moving while other suppliers are still confirming a production date.

Canopied for Outdoor Installation

Facilities at this scale rarely have a spare plant room waiting, which is why our 400 kW silent generators are supplied enclosed. The acoustically lined, weatherproof canopy brings noise down to a level that works alongside offices, neighbouring businesses, and residential boundaries, and it does so without a building having to be constructed first. Choosing a 400 kW silent diesel generator means the machine can stand outside permanently, exposed to whatever the weather brings, and carry on running. The wider selection appears on our silent generators page.

The enclosure also shapes how quickly a unit reaches service. A 400 kW canopied generator arrives with weather protection, acoustic treatment, and secure access panels already in place, which removes a stage of design, build, and sign-off from the programme. Specifying a 400 kW canopied diesel generator therefore tends to shorten the gap between delivery and commissioning, particularly on sites where civil works would otherwise sit on the critical path.

Supporting Demanding 3 Phase Loads

A 400 kW 3 phase generator supplies in the region of 721A, enough to carry production machinery, chillers, air handling plant, and the standing load of a large building together rather than in isolation. A 400 kW 3 phase diesel generator at this rating gives engineers realistic margin for the moments when several substantial loads start within seconds of one another, which is where a tightly specified installation tends to show its limits.

Whether the requirement is fixed standby protection or a long-term temporary supply, a 400 kW 3 phase genset provides a dependable foundation, and every 400 kW 3 phase diesel genset we supply arrives with a control panel setting out load, run hours, and system health in a form the site team can act on. All of our 3 phase generators operate at 50Hz, which suits UK installations and export contracts in markets sharing the same standard.

Experience That Shapes the Specification

Decisions at this level extend well past the headline rating, taking in fuel provision, ventilation, exhaust routing, and how the machine will be positioned and maintained, and our team’s combined 50-plus years in the generator industry covers all of it. As an authorised dealer, our pricing across this range is the best available anywhere in the UK, with nothing conceded on equipment quality or on the technical support that follows.

Because we carry real stock rather than relying purely on manufacturer lead times, a diesel generator from us works to your programme instead of setting it. If our range of 400 kW gensets aren’t quite the right fit for you, our neighbouring 300 kW and 500 kW ranges give you room to size up or down before settling on the best fit.

Frequently Asked Questions

Reserve Your 400 kW Generator

Ready to discuss our 400 kW generators, or looking to reserve one for your site? Contact our team by phone, WhatsApp, email, or via our online enquiry form, and we’ll help you specify the right unit for the job.