It is not just the noise, although a petrol generator droning through the night is hard to sleep beside. It is pulling the cord in sideways rain, keeping fresh fuel in the shed, the extension leads snaking through a window that will not close, the smell of exhaust in the hallway and the worry about carbon monoxide. Then it runs out at 2am and someone has to go and refill it in the dark.
This system has no engine. A PEM fuel cell turns stored hydrogen into electricity electrochemically, without combustion, and the only by-product is water, which goes back into the loop. The hydrogen is made at home by an electrolyser running on cheap off-peak power, or from wind or micro-hydro, so there are no fuel cans to buy or carry. Pumps and fans make some sound, but nothing like an engine under load.
How it works →
The battery and 15 kW hybrid inverter switch over instantly in UPS mode, so nobody goes outside and nothing needs plugging in. Neighbours are not woken, the dog does not bark at it and the house just carries on. The trade-off is energy: round-trip efficiency is 30% or less, so it costs more per unit than grid power. It is a quieter, cleaner backup, not a cheaper power supply.
There is no engine, so there is no engine noise. Pumps and fans run in the equipment, which is designed to sit outside. Placement away from bedrooms and boundaries would be planned in the pilot.
No. The fuel cell does not burn anything, and its only by-product is water. That means no exhaust in the house and none drifting to the neighbours, unlike a petrol or diesel generator.
No. The battery and inverter switch over instantly by themselves in UPS mode, and the fuel cell recharges the battery from stored hydrogen without anyone doing anything. There is no cord to pull and no fuel to carry.
Pilot installs go to people on this list first. Rural homes, farms and remote sites especially. No spam, no payment.