A handful of bell tents or pods might have lights, USB charging and a small heater each. The shared amenity block needs a water pump, hot showers, a fridge and maybe a kettle and induction hob. Wood-fired hot tubs often carry their own heat. That kind of mix sits well inside 15 kW, especially when showers and cooking are not all running at the same moment.
Off-grid sites need to store energy when it is available and use it when guests arrive. A wind turbine on a ridge or a micro-hydro on a stream can feed the electrolyser, which turns surplus into hydrogen stored at low pressure. Unlike a battery bank alone, that hydrogen keeps for weeks without losing charge, so a windy midweek can pay for a calm, full weekend.
The fuel cell's by-product is water, which goes back into the loop. It needs about 9 litres of filtered, de-ionised water per kilogram of hydrogen, and returns most of it. On a site that already collects rainwater or draws from a stream, that is a small demand on the supply guests use for showers.
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Round trip efficiency is 30% or less, so more energy goes in than comes out. On an off-grid site, that matters because the wind or water has to cover it. The pilot would size the turbine or hydro along with the storage. The upside is a site where guests hear the bush, not an engine, and the operator never carries diesel along a farm track.
Yes, that is one of the configurations it is designed for, charging from a wind turbine or micro-hydro. The site's wind or water resource has to be enough to cover the round trip losses, which is something to assess before installing.
There is no engine. Fans and pumps make a low hum, and the unit can be placed out of earshot of the tents. A wind turbine makes its own sound, which is worth considering when choosing where to put it.
Within reason. A few small heaters are fine. Many large heaters plus hot water plus cooking at once could exceed 15 kW or drain storage faster, so sites usually set sensible limits per tent.
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