
Senci SCD11000SE 8.5kW Long Run Diesel Generator
- Continuous
- 8.0kW
- Noise
- Quoted at 73 to 75 dB(A) at 7m
- Weight
- 205kg
£3,999.98
View this size10kW of single-phase diesel power for a large home or small business. The Hyundai DHY12500SE is a twin-cylinder standby generator in a sound-attenuating canopy, with 20 hours of running at half load and an ATS input ready for automatic changeover. It's built for when a small petrol generator simply won't cover the load.
✔ Authorised UK reseller ✔ Free delivery to mainland UK ✔ Prices include VAT ✔ 1-year warranty
Ideal for: large homes with heavy loads, small commercial units, farms and rural businesses wanting dependable single-phase standby.
Look elsewhere if: you have three-phase equipment, in which case see our three-phase generators. If 5 to 6kW would cover your essentials, our smaller diesel generators are easier to site and move.
Plan around the 10kW continuous output, and have an electrician survey your actual load first. The 11kW maximum is for short bursts, such as a motor starting. A 32A socket supplies up to about 7.4kW, so use the 63A outlet for the full output.
| Appliance | Typical running watts |
|---|---|
| Fridge freezer (higher start-up draw) | 150 to 300W |
| Central heating pump and boiler electrics | 100 to 200W |
| Lighting for a whole property | 200 to 500W |
| Microwave (800W cooking power) | around 1,200W |
| Kettle | 2,500 to 3,000W |
| Immersion heater | 3,000W |
| Electric shower | 8,500W: only with little else on. Showers over about 9.5kW are too much |
Example: fridge freezer 200W + boiler electrics 150W + lights 300W + TV and broadband 200W + kettle 3,000W + microwave 1,200W + immersion heater 3,000W comes to about 8,050W, which leaves around 1,950W in hand. Check the rating plates on your own appliances, as figures vary.
This generator should be connected by a qualified electrician. Use a manual changeover switch, or Hyundai's automatic transfer switch package with the ATS input for automatic start. Either way, the generator and the mains must never be connected together, and it must never be fed through a socket.
Delivery note: at 295kg, you'll need a way to unload it safely, so please check access before ordering. Hyundai stock can take 1 to 3 working days to dispatch. Contact us before ordering if you need one by a certain date.
| Model | Hyundai DHY12500SE |
|---|---|
| Type | Silent canopied diesel standby generator |
| Maximum output | 11kW / 13.75kVA |
| Continuous output | 10kW / 12.5kVA |
| Engine | Hyundai HY290F, 2-cylinder, air-cooled, 4-stroke, 20hp |
| Start | Electric key start; ATS / two-wire start input |
| Voltage / phase | 230V, single phase, 50Hz |
| Outlets | 1 x 230V 63A, 1 x 230V 32A, 12V DC |
| Regulation | AVR |
| Controls | Digital panel, emergency stop, overload breakers |
| Fuel tank | 50 litres, diesel, base-mounted |
| Run time | 12 hours at 100% load; 20 hours at 50% load |
| Noise | 68 dB(A) at 7m |
| Oil | SAE 15W-40, 2.25L |
| Weight | 295kg |
| Dimensions | 1175 x 695 x 925mm (body); about 1050mm high on wheels |
| Wheels | 4 castors, 2 steering with brake, 2 fixed |
| Warranty | 1 year, subject to manufacturer's terms |
Will it start automatically in a power cut? Not on its own. It has an ATS input, and needs an automatic transfer switch installed to do this. Ask us about the Hyundai ATS package.
Can it run three-phase equipment? No, this is a 230V single-phase generator.
Will it power an electric shower? An 8.5kW shower will run with little else on, but larger showers exceed what it can supply continuously. Have an electrician check your actual load.
Is it really silent? Hyundai calls it silent, but 68 dB(A) at 7m is still clearly audible, so site it away from neighbours.
Not sure it's the right size? Send us your appliance list at sales@generator-uk.co.uk or call 01744 520110, Monday to Friday, 8:30am to 5pm, and we'll help you size it.
Safety: run outdoors only, well away from doors and windows. Generator exhaust contains carbon monoxide. Let the engine cool before refuelling.
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Includes VAT and free mainland UK delivery
Overview
10kW of single-phase diesel power for a large home or small business. The Hyundai DHY12500SE is a twin-cylinder standby generator in a sound-attenuating canopy, with 20 hours of running at half load and an ATS input ready for automatic changeover. It's built for when a small petrol generator simply won't cover the load.
✔ Authorised UK reseller ✔ Free delivery to mainland UK ✔ Prices include VAT ✔ 1-year warranty
Ideal for: large homes with heavy loads, small commercial units, farms and rural businesses wanting dependable single-phase standby.
Look elsewhere if: you have three-phase equipment, in which case see our three-phase generators. If 5 to 6kW would cover your essentials, our smaller diesel generators are easier to site and move.
Tap everything you want to run at the same time. We check it against this generator’s real ratings.
Plan around the 10kW continuous output, and have an electrician survey your actual load first. The 11kW maximum is for short bursts, such as a motor starting. A 32A socket supplies up to about 7.4kW, so use the 63A outlet for the full output.
| Appliance | Typical running watts |
|---|---|
| Fridge freezer (higher start-up draw) | 150 to 300W |
| Central heating pump and boiler electrics | 100 to 200W |
| Lighting for a whole property | 200 to 500W |
| Microwave (800W cooking power) | around 1,200W |
| Kettle | 2,500 to 3,000W |
| Immersion heater | 3,000W |
| Electric shower | 8,500W: only with little else on. Showers over about 9.5kW are too much |
Example: fridge freezer 200W + boiler electrics 150W + lights 300W + TV and broadband 200W + kettle 3,000W + microwave 1,200W + immersion heater 3,000W comes to about 8,050W, which leaves around 1,950W in hand. Check the rating plates on your own appliances, as figures vary.
This generator should be connected by a qualified electrician. Use a manual changeover switch, or Hyundai's automatic transfer switch package with the ATS input for automatic start. Either way, the generator and the mains must never be connected together, and it must never be fed through a socket.
Delivery note: at 295kg, you'll need a way to unload it safely, so please check access before ordering. Hyundai stock can take 1 to 3 working days to dispatch. Contact us before ordering if you need one by a certain date.
Data sheet
| Model | Hyundai DHY12500SE |
|---|---|
| Type | Silent canopied diesel standby generator |
| Maximum output | 11kW / 13.75kVA |
| Continuous output | 10kW / 12.5kVA |
| Engine | Hyundai HY290F, 2-cylinder, air-cooled, 4-stroke, 20hp |
| Start | Electric key start; ATS / two-wire start input |
| Voltage / phase | 230V, single phase, 50Hz |
| Outlets | 1 x 230V 63A, 1 x 230V 32A, 12V DC |
| Regulation | AVR |
| Controls | Digital panel, emergency stop, overload breakers |
| Fuel tank | 50 litres, diesel, base-mounted |
| Run time | 12 hours at 100% load; 20 hours at 50% load |
| Noise | 68 dB(A) at 7m |
| Oil | SAE 15W-40, 2.25L |
| Weight | 295kg |
| Dimensions | 1175 x 695 x 925mm (body); about 1050mm high on wheels |
| Wheels | 4 castors, 2 steering with brake, 2 fixed |
| Warranty | 1 year, subject to manufacturer's terms |
Right size?

£3,999.98
View this size
£9,842.50
Questions
Safety: run outdoors only, well away from doors and windows. Generator exhaust contains carbon monoxide. Let the engine cool before refuelling.
Complete your setup
Checked against this generator’s sockets and fuel.