Reliable 3.3kW inverter power for larger caravans, motorhomes and off-grid leisure

When a 2kW generator is not quite enough for your setup, the next step up matters. The Hyundai HY3900Si delivers 3.3kW / 3300W maximum output and 3kW / 3000W continuous from a 144cc four-stroke engine. That extra headroom means you can run a caravan fridge, charge multiple devices, power lighting and still have capacity left over. The pure sine wave output keeps sensitive electronics safe, while the ECO mode stretches your fuel when full power is not needed. At 21.15kg, it is still portable enough for one person to move.

Key Benefits

Enough power to run multiple appliances at once

With 3.0kW continuous output, the HY3900Si handles combinations that smaller generators cannot. Run a fridge, charge your devices and power lighting simultaneously without worrying about overload. Ideal for larger caravan and motorhome setups.

Pure sine wave output for clean, safe power

The inverter technology produces stable electricity with low harmonic distortion. Connect laptops, televisions, games consoles and other sensitive electronics with confidence.

ECO mode for fuel efficiency and reduced noise

When you are drawing less than full load, ECO mode automatically reduces engine speed, reducing noise and giving better fuel economy. This extends the runtime in between refueling.

Industrial blue socket for higher-draw equipment

The HY3900Si features a 16A industrial blue socket for connecting equipment that draws more than a standard connection. The 3-in-1 digital meter lets you monitor output in real time.

Who Is This For?

This generator is ideal for:

• Caravan and motorhome owners with larger power requirements
• Glamping and off-grid leisure setups wanting dependable mid-range power
• Boat owners and marina users needing portable shoreside power
• Garden parties and outdoor entertaining where mains power is not available
• Allotment holders and rural property owners needing seasonal off-grid power

This generator is NOT ideal for:

• Lightweight camping trips where minimum weight matters — the HY2350Si is lighter and quieter
• Extended use where longer runtime is critical
• Users who need electric start convenience — this model uses recoil start only

What’s In The Box

• Hyundai inverter generator
• Adjustment tools
• User manual