Whether it is button mushrooms on compost or oyster and shiitake on blocks, a growing room relies on air handling units that bring in fresh air, humidifiers or misting, a climate controller that reads CO2, temperature and humidity, and often cooling in summer. Pinning and fruiting are sensitive stages, and long periods of poor conditions show up as malformed caps or a lost flush. Smaller specialty growers often run from converted sheds or containers on rural blocks, where the power supply is the least reliable part of the operation.
Hydrogen is made overnight on off-peak power, or from wind or micro-hydro, and stored at 30 bar or less. When the grid fails, a UPS-mode inverter switches instantly so the climate controller keeps its program and the fans do not stop. The fuel cell then carries the rooms while the hydrogen lasts, and its only by-product is water, which goes back into the loop.
How it works →
A few small growing rooms or containers with fans, humidifiers and modest cooling sit well within 15 kW continuous. A large commercial farm with many rooms, big refrigeration plant and compost tunnels draws far more and would need a larger or multi-unit setup, sized from your loads in a pilot. Compost pasteurisation and steam generation are heavy heat loads and are not a sensible fit for hydrogen at 30% or less round-trip efficiency.
It depends on the stage and the room, but CO2 and humidity start drifting as soon as air handling stops. With instant switch-over, the controller never loses its place, so the question does not arise during an outage.
Small room cooling units fit within 15 kW alongside fans and humidifiers. Large central refrigeration plants may not. The pilot would log a summer week to be sure, because the hottest afternoons set the peak load the system has to carry.
It would be sited outside the rooms with proper ventilation. It is designed to AS/NZS 60079 and ISO 19880 with redundant leak sensors, automatic shutdown and venting, and it is quiet with no engine.
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