The HY3900Si is a high quality, compact, lightweight and portable inverter generator from the renowned generator manufacturer Hyundai. Ideal for use as a home back-up generator or for camping and motor homes.
What's so special about an inverter generator?
Unlike cheaper standard generators, inverter generators provide a very stable pure sine wave output, with a consistent voltage and frequency which is as good as that from any mains supply. The increased stability makes them the ideal choice for powering sensitive electronic equipment such as TVs, computers and phones, which can be irreparably damage by a standard generator.

What can I power?
The unit can provide a continuous power rating of 3,000w (3kW) with a maximum peak output of 3,300w (3.3kW) and can power sensitive electronic equipment such as TVs, computers and phones. See our generator advice page for a handy guide to calculating the power you need for your application.
How do I connect appliances?
The unit has 1x 230v 16A IEC60309 commando socket. See our generator advice page for further advice on how to connect appliances to the generator.
Specification
- 3000w (3kW) continuous, 3,300w (3.3kW) maximum peak output power rating. Digital overload protection shuts down the generator if either max is exceeded.
- ECO mode automatically reduces engine speed when you are drawing less than full load, reducing noise and providing better fuel economy.
- 144cc 4-stroke, air cooled, recoil easy-start Hyundai engine.
- Using the latest low-noise engine technology, the generator only produces 67.6dBA at 7m.
- 1x 230v 13A standard UK mains socket.
- 1x 12v 8.3A socket to power 12v appliances.
- Max continual run time at 50% lead 3.6 hours.
- Fuel consumption 0.7 litres per hour at 50% load.
- Low oil level shutdown.
- 3-in-1 digital meter enables real time monitoring of the output.
- Net weight 21.15g for easy handling.
- 1 year commercial and 3 year domestic warranty.