Hyundai HY3250SEi Generator review
Hyundai HY3250SEi 3200W Inverter Generator
By Tom Calder
A 3.2kW pure sine-wave inverter generator that delivers clean power for sensitive electronics, with electric and recoil start and 3,000W continuous output. At 26.5kg with moulded carry handles it is lighter than the HY3200SEi it replaces in our guide, but Hyundai lists no wheel kit or remote key-fob start for it. Sensible for occasional outage cover or off-grid use, which is what Hyundai designs it for, though it is a petrol machine that must be run and refuelled safely outdoors.
- Best for
- Caravanners and homes wanting clean inverter power with electric start for occasional backup.
- Skip it if
- You only need to keep phones, a router and a few lights going, or if you have nowhere to run it…
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Researched, not used. We haven't used this product. This review is built from the maker's specifications, owner reports and our own sizing.
What we like
- Pure sine-wave output safe for laptops, TVs and other sensitive electronics
- 3.2kW maximum / 3kW continuous covers a fridge-freezer, lights, router and small appliances in an outage
- Electric start with recoil as a backup, an ECO mode that matches engine speed to the load to save fuel, low-oil shutdown, and a 3-year Hyundai domestic warranty (1 year for commercial use)
Worth knowing
- Petrol-only means storing fuel and refuelling about every 5.5 hours at half load (Hyundai's figure for the 7-litre tank) during a long outage
- At 26.5kg and 59 dB(A) (Hyundai's figure at 7m and 75% load) it is heavier and more audible than a battery power station, and not silent
- Hyundai lists moulded carry handles but no wheel kit or remote key-fob start, both of which the HY3200SEi had
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Our review
A 3kW inverter generator with push-button electric start that Hyundai aims at caravans and occasional home backup. The figure that decides it is 3,000W continuous from a 7-litre tank: enough for a fridge-freezer, boiler electrics, lights and a microwave together, with a kettle only on its own. It suits a household with somewhere outdoors to run it and a safe place for petrol.
What the numbers mean
Hyundai rates the HY3250SEi at 3,200W maximum and 3,000W continuous, with overload protection that cuts power to the outlets while the engine keeps running, until you unplug and press reset. The output is pure sine wave, which is the point of an inverter model: the 149cc engine runs between 3,200 and 5,400rpm and the electronics turn that into steady 230V at 50Hz, the waveform laptops, boiler controls and TVs expect. Outlets are two UK 13A sockets and a 12V 5A DC outlet. Hyundai's noise figure is 59dB(A) at seven metres at three-quarters load; its sound power rating is 95 LwA.
In a UK power cut
From our appliance-draw dataset, a fridge-freezer's nameplate is 100 to 240W with a start-up surge around 960W, a gas combi boiler's electrics 35 to 123W, a router about 14W, a TV 33 to 217W and a laptop up to 70W. All of that together sits under 700W, a quarter of the rated output, so ECO mode can drop the engine speed and stretch the fuel. A microwave draws 1,250 to 1,450W on top and still fits. A kettle is the limit case: a 2.2kW kettle leaves about 800W for everything else, and a 3kW kettle takes the whole 3,000W, so unplug everything else first. A hard-wired boiler needs an electrician-fitted changeover switch; see power cut preparation.
Fuel, runtime and cost
Hyundai quotes 5.5 hours at half load from the 7-litre tank, 8.9 hours at a tenth of load, and 13.8 hours at a tenth of load with ECO on. That works out at about 1.3 litres an hour at half load: about £2.20 an hour at the RAC Fuel Watch UK average of 174.18p a litre for unleaded on 19 October 2026, or about 88p an hour at a tenth of load with ECO on. Its spec table also lists 3.5 litres an hour at half load, which contradicts the 5.5 hours, so budget generously. A 24-hour outage at half load is more than four tanks, roughly 30 litres of petrol. The manual says never to store fuel, or the machine with fuel in it, inside a building where fumes could reach a flame or spark, and to refuel only with the engine stopped and cooled.
How it compares
On the comparison the Hyundai HY3900Si gives the same 3,000W continuous for 21.15kg, but with recoil start only, a 4-litre tank good for a stated 3.6 hours at half load, 63dB(A), and a single 16A blue socket that needs an adaptor for household plugs. The 18kg Hyundai HY2350Si gives 1,800W: the essentials, not a microwave or kettle. The HY3250SEi is the one of the three with electric start, two 13A sockets and the biggest tank, for 26.5kg; the HY2350Si's stated 5.7 hours at half load is similar, but half of a much smaller output.
Living with it
The manual asks for 0.41 litres of 10W-30 oil (the product page says 600ml; fill to the dipstick), an oil change after the first 10 hours and then yearly or every 100 hours, 95-octane petrol, and a drained tank and carburettor before long storage. It is rated to 32°C ambient and must not run in rain. It has moulded handles and no wheels. The warranty is three years for home use, one year commercial, capped at 1,000 hours. Unused items in unopened packaging can go back within 14 days, less a return and restocking fee of at least 5%.
Safety
The manual is blunt: exhaust contains carbon monoxide, running a generator inside a house, garage, large vehicle, boat or tent can kill in minutes, and open doors and windows do not make it safe. Run it outside, away from windows, doors and vents. The NHS lists portable generators among the causes. Use outdoor-rated extension leads (the manual asks for IEC 245 type), fit an RCD, earth the generator at its terminal, and keep a CO alarm in the house. Our generator safety guide has the full routine.
Our verdict
Buy it if you have a sheltered outdoor spot away from the house, a cool, safe place for petrol, and loads that need 3kW. Skip it if your outage plan is phones, router, lights and a fridge: a 1 to 2kWh battery does that with no fuel, no fumes and no neighbours hearing it.
A researched review, built from the maker's specs, manual and UK listings; facts checked 21 Oct 2026. Sources: Hyundai Power Equipment UK: HY3250SEi product page; Hyundai HY3250SEi user manual (PDF); Hyundai HY3250SEi spec sheet (PDF); Hyundai Power Equipment UK: warranty information; NHS: carbon monoxide poisoning; RAC Fuel Watch: UK average pump prices.
Who shouldn't buy this
Don't buy this if you only need to keep phones, a router and a few lights going, or if you have nowhere to run it safely outdoors: a battery power station is silent and gives off no fumes or carbon monoxide, so it can be used indoors (follow its maker's charging and storage guidance). A petrol generator must never be run in a garage, porch or indoors.
Key specs
| Running power | 3,000 W |
| Fuel | Petrol |
| Runtime | 5.5 hr |
| Noise | 59 dB |
| Inverter | Yes (pure sine wave) |
This is a Researched review: we haven't used this product. We check every specification against at least two independent sources, re-check the UK price on a schedule where we can track it automatically, and say plainly who it isn't for. Commissions never change a rating.
If this isn’t the one
Best for Households that want 3kW of inverter power in a lighter, recoil-start body and are happy to use a 16A connection.
as of 4 Nov 2026, 20:07 GMT · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.co.uk at the time of purchase will apply to the purchase of this product.
Best for A petrol backup for a long power cut that can run a fridge, lights and sensitive electronics.
as of 4 Nov 2026, 20:07 GMT · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.co.uk at the time of purchase will apply to the purchase of this product.Questions
Can the Hyundai HY3250SEi run a fridge-freezer?
Yes. A fridge-freezer's nameplate is 100 to 240W with a start-up surge around 960W in our dataset, well inside the 3,200W peak. Plug it in first; Hyundai says to connect appliances one at a time.
How loud is the Hyundai HY3250SEi?
Hyundai quotes 59dB(A) at seven metres at 75% load and a sound power level of 95 LwA. The manual gives a range of 50 to 59dB(A) at seven metres, so expect it to be quieter at light loads.
Can the HY3250SEi boil a kettle?
A 2.2kW kettle, yes, with about 800W to spare. A 3kW kettle uses the entire 3,000W continuous rating, so everything else must be unplugged first or the overload protection cuts the sockets.
Can I run the HY3250SEi in a garage with the door open?
No. Hyundai's manual says never to use it inside a house, garage, vehicle, boat or tent, and that open doors and windows do not make it safe. It must run outdoors, away from openings.
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