• Description
  • Specs
  • Delivery

Using only the best components which are assembled in the UK this 400kVA generator features a genuine Perkins diesel engine. The Excel Power XL400P is manufactured using individually selected elements including a Stamford S4L1D-F41 alternator. Together with the Perkins engine makes this the best 400kVA generator for sale in the UK. It will meet or exceed your power needs.

400kVA Diesel Generator Suitable for Standby or Prime applications*

Housed in silenced, 69.7 dB(A) at 7m, weather-proof canopy made from laser cut galvanized steel, welded doors and roof for the highest possible standard of construction. All the viewing windows are made from polycarbonate panels which reduce noise break out. Having a 1300L built in fuel tank this genset can run for 20 hours @ 75% load. This 400kVA Genset can be used in applications such as prime power – when a generator is the primary power source. Or as a Standby generator – used as a backup to mains supply power.

A high quality base in UK sourced CR4 sheet steel has been polyester powder coated at over 200 degrees C, with black zinc die cast hinges on the doors. Which have all been tested and proven to withstand extremely corrosive conditions. This makes the XL400P one of the best and highest possible standards of construction in the industry.

Powerful Deepsea Control

Included is a set mounted control panel using a Deepsea programmable logic controller (DSE7120 MK2) for complete control. The Deepsea controller has various purposes such as: starting the engine, making sure that various generator protections are constantly monitored. Displaying any relevant warnings or shutting the engine down entirely in the event of causing a potential hazard. Plus, much more so you are in complete control.

Any aspect of this Excel Power XL400P 400kVA generator can be customised to suit your installation or requirements. Please contact us to discuss your requirements and we will be pleased to put a price together for you.


  • Original Equipment Perkins 1500rpm engine with mechanical governing.
  • Original Equipment Stamford alternator.
  • UK Designed, Manufactured, Tested and approved.
  • Exclusive to Hampshire Generators.
  • Set mounted automatic / manual control panel and output breaker.
  • Large integrated diesel tank to provide at least 8 hours running time.
  • Set mounted starter batteries and battery cables.
  • Inboard rubber Anti-vibration mounts.
  • Cooling radiator and engine driven fan.
  • Emergency stop switch.
  • Hard wired connection via gland plate.
  • CE Marked for UK / European installation.

*Subject to emissions regulations for prime power use – please check if your application requires emissions certification.


  • Frequency Hz 50
  • Voltage V 400 / 230
  • Power factor cos ϕ 0.8
  • Phase 3


  • Prime power PRP kVA 400
  • Maximum Power ESP kVA 425


  • Engine manufacturer Perkins
  • Model 2206A-E13TAG3
  • Number of cylinders 6 vertical in-line
  • Bore and stroke 130 x 157 mm
  • Displacement 12.5 litres
  • Aspiration Turbocharged and air-to-air charge cooled
  • Cycle 4 stroke
  • Combustion system Indirect injection
  • Compression ratio 16.3:1
  • Governor Type/Class Electrical
  • Rotation Anti-clockwise, viewed on flywheel
  • Total lubricating capacity 40 litres
  • Cooling system Water cooled
  • Total coolant capacity 51.4 litres


  • Alternator Stamford
  • Model S4L1D-F41
  • AVR Type AVR Power
  • Voltage Regulation ± 1%
  • Insulation System CLASS H
  • Protection IP23
  • Stator Winding Double Layer Concentric
  • Winding Pitch Two Thirds
  • Winding Leads 12


  • Length (L) mm 4908
  • Width (W) mm 2164
  • Height (H) mm 2515
  • Weight Kg 5327
  • Fuel tank capacity L 1300


  • Fuel consumption @ 75% l/h 62
  • Fuel consumption @ 100% l/h TBC
  • Fuel consumption @ 110% l/h TBC


  • Noise pressure level @ 7 m dB(A) 69.7


When will I receive my order?

In most cases, a product on our website will give you an indication of the current stock availability, but shipping is not uniform for all products. We maintain fantastic relationships with all of our suppliers and we aim to get products to customers within 3 business days of the order being taken. This availability is based on information from our suppliers and from sales and supply patterns. The availability information given is a guide only and not a guarantee as there are external factors that we may not have control over.

Coronavirus Update – UK couriers and transport companies will not currently guarantee delivery times and we are seeing a slight delay in deliveries – please bear this in mind when ordering.

Specialist Couriers – Some items such as the larger portable power stations are sent by specialist courier as standard couriers will not accept them. These specialist couriers are very reliable but sometimes don’t have tracking or timed delivery.

Split deliveries – We sometimes need to send orders for more than one item by different courier networks (portable power stations for example) – so you may receive items at different times.

1500rpm machines or larger diesel gensets however are typically priced on application and all depend on the destination. We will be happy to quote on any large diesel generator and discuss your needs over the phone or via email.

Most orders placed before 12pm on a business day will be shipped from our suppliers on the same day provided the product is in stock. If you need to be certain an item is in stock and available, or if you need a lead time, it’s worth calling our sales team on 01329 722390. Pricing for extended shipping areas like Northern Ireland, the Scottish Highlands and outlying Islands, Outer Hebrides, Channel Islands, Isle of Man, Scilly Isles, and other postcodes not considered as UK mainland can be obtained also by calling our offices.

Please note that the processing of a payment and acknowledgement email does not constitute a legally binding contact. In the case of mispricing, changes in stock quantity, or if we believe the machine will be misused, we reserve the right to cancel the order and provide a full refund.

Heavy Items

You will be contacted by phone after ordering a larger item to confirm a delivery date before your order is dispatched. Large or heavy items are dispatched through a pallet network, so if we can’t get in contact with you, we may be unable to send out your item on a next day delivery. Please be sure to include a working phone number with your order.

Heavy items will require the recipient to make arrangements to take delivery of the goods and may require the recipient to help the courier unload the item. For items that are delivered on a pallet the courier will leave the pallet as close to your door as possible.

1500rpm diesel generators will require forklift (or similar) offloading; if this is not available then we can arrange a Hiab offload at an additional price – please call us to discuss any delivery requirements.

Product Reviews


Get in touch with us today and we'll be happy to answer any questions you have.

Product Details

400kVA Generator – Perkins diesel generator – Excel Power XL400P

  • 400KVA Prime Power / 425KVA Maximum Power
  • High quality UK made Perkins Engine (2206A-E13TAG3)
  • High quality Stamford Alternator (S4L1D-F41)
  • Low Oil Pressure Shutdown
  • Deep Sea Electronics 7120 MK2 controller.
View all products

Need Expert Advice?


We use cookies in order to give you the best possible experience on our website. By continuing to use this site, you agree to our use of cookies.