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Hyundai DHY12500SE 10kW 12.5kVA Silenced Standby Diesel Generator

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  • 10.0kW / 12.5kVA maximum output
  • 9.0kW / 11.25kVA continuous output
  • 2 x 230V output sockets
  • 60 litre fuel tank for a 18 hour run time @ 50% load
  • Electric start with ATS compatibility

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£3,699.99 exc. VAT £4,439.99 inc. VAT

Price as configured: £0.00 exc. VAT £0.00 inc. VAT

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£3,699.99 exc. VAT £4,439.99 inc. VAT


Long Running Backup Power

The Hyundai DHY12500SE standby home backup diesel generator, fitted with a 60L fuel tank which offers a maximum running time to 18 hours*, depending on the usage. The silenced sound attenuated canopy ensures low noise, and the compact design and portability makes this diesel generator extremely popular.

Power Your Home or Business

The DHY12500SE diesel generator produces a maximum power output of 10.0kW / 12.5kVA, which makes it ideal for both home and business standby / backup. For agricultural users, this diesel generator is ideal for mobile field repairs, allowing you to bring the workshop out to the field. 

Equippped with an AVR alternator, The reliable performance is provided by a 20hp HY290F Hyundai engine, running at 3000rpm. Hyundai diesel engines are renowned for their long lifespans and reliability, and with low maintenance requirements this generator is perfect for users with no mechanical experience.

Powering You Around The Clock

The long running time of this generator is made possible by the impressive fuel economy, and running costs are kept low thanks to the option to power it using red diesel.

A user friendly generator, the DHY12500SE features electric key start for easy starting, as well as a digital control panel for monitoring statistics such as the frequency, total hours run and voltage. It has low maintenance requirements and even novice users will find it easy to use. It also has built-in safety features, such as low oil shutdown and automatic engine shutdown.

Housed in a sound attenuated canopy, the noise level produced by this generator is significantly reduced, and there are two sockets available in total:

  • 1x 230V/32A
  • 1x 230V/63A

The DHY12500SE is ideal for standby or backup power for your home, this generator will, on average power or backup a standard house (however we recommend using an electrician to confirm your power requirements prior to purchase).

This 20hp diesel generator can also be used in workshops, on farmyards or for mobile agricultural field repairs to keep machinery mobile during peak times such as Harvest. Please note our recommended applications as detailed below.

3000rpm Diesel Generator Applications

Check oil level daily. Ensure battery is fully charged.

Oil change service intervals: after first 20 hours, then every 100 hours or 12 months whichever is sooner.

Light Duty

Light duty rating is applicable for supplying power in portable and/or intermittent applications. The average load should not be lower than 30% or higher than 80% of the rated output of the generator.

Continuous use should not exceed 5 hours and annual operation should not exceed 500 hours to be within the sanctioned parameters. 

Emergency / Standby Duty

Emergency duty rating is applicable for supplying power for the duration of a utility power outage. No overload capability is available.

Average load should not be lower than 30% or higher than 80% of the rated output of the generator. Annual operation should not exceed 500 hours to be within the sanctioned parameters.


For prime power applications see our 1500RPM diesel generators.

*All non inverter or converter generators:
Fitted with an AVR (Automatic Voltage Regulator) controlled alternator to maintain voltage as near to 230v as possible. Non AVR alternators have a large fluctuation in voltage and can damage sensitive electronic equipment. If you require a portable generator to replicate the mains supply, it is recommended that a pure sine wave inverter generator is used.



Optional ATS Package

For added convenience, this diesel generator can be configured to work with an Automatic Transfer Switch (ATS), or a simpler manual changeover switch (MTS / MCS). The automatic transfer set up will detect a loss of power from the mains, turn the generator on, and then turn it off again when power from the mains returns. This makes backing up your home or business completely automatic. However, the more cost effective solution is to set this generator up with a manual changeover switch. In the event of a power cut, simply turn the generator on using the key or a '2 wire start', and once up to speed, simply turn the manual changeover switch to begin powering your home/the load via the generator. When the power returns, turn the manual changeover switch back to mains power, and turn the generator off. Please note; this generator does not come as standard with any changeover switches.

For Hyundai's recommended usage of this generator, please see here.



Manufacturer Hyundai
Inc. Accessories 12V Leads and Clips. worth £9.95
Engine Capacity (cc) 650.00
Sockets 1 x 230V 32A, 1 x 230V 63A
Engine Manufacturer Hyundai
Engine Model HY290F
Oil Capacity (l) 2.25
Max. Engine Speed (rpm) 3000.00
Fuel Tank Capacity (l) 60.00
Warranty 1 Year
Alternator Type AVR
Continuous Power (kVA) 11.25
Continuous Power (kW) 9.00
Frequency (Hz) 50.00
Max. Power Output (kVA) 12.50
Max. Power (kW) 10.00
ATS Port Standard
Dimensions (mm) 1175 x 695 x 1050
Fuel Consumption (l/hr 50% load) 3.33
Voltage (V) 230.00
Noise (dB @ 7m) 70.00
Noise (dBA @ 1m) 94.00
Fueled/Driven by Diesel
Maximum Run Time (hr) 18.00
Starting Method Electric
Net Weight (Kg) 295.00
Cooling Method Air-cooled
Engine Type Twin Cylinder, Forced Air Cooled, OHV
Wheel Kit? Yes
Engine Air Intake Rate 1.2 Cubic Matres Per Minute
Air Cooling Flow Rate 10.5 Cubic Matres Per Minute

 We provide FREE SHIPPING (terms apply) to mainland UK addresses on the majority of items.

Pricing for extended shipping areas like Northern Ireland, the Scottish Highlands and outlying Islands (the Outer Hebrides, Channel Islands, Isle of Man, Scilly Isles, etc) will incur a surcharge.

Please note: Very small items like spare parts will carry a cost for shipping, as will very large or heavy items like our 1500rpm diesel generators.

Feel free to contact us on 01437 700 123 or via live chat if you have any questions before ordering. 

If you place an order for an extended area, a small part or a large item which requires a postage fee we will contact you to discuss.

For full shipping and delivery terms and conditions, please click here.

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