Hyundai HY6250SEi 5.5kW Electric Start Petrol Inverter Generator

5kW of clean, pure sine wave power on wheels, started with a turn of a dial. The Hyundai HY6250SEi has the output to run air conditioning, a microwave and sensitive electronics together, which smaller leisure inverters can't manage. It weighs just 39kg, carries a 32A outlet for your full load, and drops to 61 dB(A) at 7m on light loads.

✔ Authorised UK reseller ✔ Free delivery to mainland UK ✔ Prices include VAT ✔ 3-year home-use warranty

Why buyers choose the HY6250SEi

• Safe for sensitive electronics. Pure sine wave output suits laptops, TVs, routers and chargers, even with heavier appliances running alongside them.
• Real capacity at 39kg. 5kW continuous and 5.5kW maximum, with built-in wheels and a handle to move it into position.
• One dial to start. A single 3-in-1 control combines the fuel tap, choke and electric start. There's no key to lose, and a recoil cord is fitted in case the battery is flat.
• The outlet that unlocks the full output. A 13A socket stops at 3kW, so the blue 32A socket is what lets you use all 5kW. There's also a 12V DC outlet.
• ECO mode. Engine speed falls when demand falls, cutting noise and fuel use. The 11L tank lasts up to 21.7 hours at 10% load.
• Easy to keep an eye on. The 3-in-1 digital meter helps you track output and plan refuelling, and an AC reset gets you going again after an overload.

Is it right for you?

Ideal for: larger motorhomes and twin-axle caravans, glamping and off-grid cabins, motorsport and equestrian vehicles, allotments and rural properties needing seasonal power, and occasional power cuts at home.

Look elsewhere if:

• You want to carry it by hand or need the quietest option on a campsite. The Honda EU22i is 21.1kg and 52 dB(A) at 7m, with less power.
• You need 110V for site tools. The Senci SC6000-II has 230V and 110V outlets.
• It will run all day, every day, or for commercial work. This is a seasonal leisure generator, so see our long run generators.
• You want it to start itself in a power cut. It has no automatic start, so see our standby generators.

What will it run?

Plan around the 5kW continuous output. The 5.5kW maximum is for short bursts, such as a motor starting. These are typical figures, so check the rating plates on your own appliances.

Motorhome example: air conditioning 2,000W + microwave 1,000W + fridge 150W + laptop, TV and router 250W comes to about 3,400W, which leaves around 1,600W in hand. That's more than a 13A socket can deliver, so it needs the 32A outlet.

Power cut example: fridge freezer 200W + boiler electrics 150W + LED lights 200W + TV and broadband 200W comes to about 750W, a light load where ECO mode does its best work.

Run time and noise

It's quiet for its output, but it isn't a suitcase generator. One owner compared it to a lawn tractor, so think about where it will sit if you have close neighbours.

Using it in a power cut

Never plug a generator into a house socket. To power household circuits, have a qualified electrician fit a manual changeover switch so that the generator and the mains can never be connected together. Someone will need to start it by hand. For a few appliances, you can run them directly from the generator using suitable outdoor-rated leads.

Before your first start

• Connect the battery. The negative lead may be disconnected for transit. Take off the side panel on the air filter side and connect it, or electric start won't work. The printed manual may not cover this step.
• Add engine oil. It takes 0.65L of SAE 10W-30. Check the level before every use.
• Fill with fresh unleaded petrol. Stale or contaminated fuel isn't covered by the warranty.
• Earth it as the manual describes. Check what your setup needs before use.
• Start with nothing plugged in. Let it settle, then connect appliances, largest first.

In the box: generator, adjustment tools and user manual. Oil, petrol, an earth spike and a 32A plug aren't listed as included, so have what you need ready.

Full specification

FAQs

Does it start with a key? No. Some adverts for this model mention a key, but it starts with the dial on the control panel, with a recoil cord as back-up.

Why won't the electric start work out of the box? The negative battery lead is usually the reason. Connect it behind the side panel, as described above.

Can I connect my motorhome or caravan? Yes, but a standard 16A hook-up plug won't fit the 32A socket directly. You'll need a correctly rated lead or adaptor, so tell us your setup and we'll advise.

Will it run my air conditioning? Usually, yes. Air conditioners draw far more for a moment when starting, so check your unit's start-up figure. Overload damage isn't covered by the warranty.

Will it run 110V tools? No. Its outlets are 230V and 12V DC only.

Can I run it in the rain? It has no IP rating, so keep it dry and well ventilated, with clear space on all sides.

Can I use it on a boat? On the bank or an open deck only, clear of any cabin vent. Damage caused by a marine environment isn't covered by the warranty.

How does the warranty work? Hyundai covers home use for 3 years or 1,000 hours, whichever comes first. Commercial use is 1 year and hire is 90 days. Inverter boards are covered for 2 years, and some service items for 1 year. Service the generator as the manual sets out and keep your records.

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, windows and vents. Generator exhaust contains carbon monoxide. Never run it inside a caravan, motorhome, boat cabin, awning or tent. Let the engine cool before refuelling.