H2OME

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Home brewing that doesn't stop for a power cut

Brew day is long and fermentation runs for weeks. A rural outage can catch either, and an uncontrolled ferment or a stalled mash rarely ends well.

Where an outage hurts a batch

An electric all-in-one brewer that loses power mid-mash lets the temperature drift and the conversion stall. Mid-boil, the wort sits warm and exposed. In the following weeks, a fermentation fridge or heat belt that stops lets a lager warm up or an ale cool down, and off flavours follow. A keezer full of finished beer warming up is less of a disaster, but nobody enjoys flat, warm beer after a storm.

What it would keep running

  • Electric all-in-one brewer and pump
  • Fermentation fridge with temperature controller
  • Keezer and kegerator
  • Glycol chiller or heat belts

Brew day loads

Electric brewing systems are one of the bigger loads in a home, alongside a kettle element, a pump and a chiller. At 15 kW continuous output, the system is designed to carry a brew day and the house together, with headroom for peaks. The battery and inverter run in UPS mode, so a dip does not reset the controller's step mash programme halfway through.

Planning a brew day around a storm warning still makes sense, but if the power goes, the batch is designed to carry on. The pump keeps recirculating, the element keeps holding the mash temperature, and the chiller still runs when it is time to cool the wort into the fermenter.

How it works →
The H2OME loop: an electrolyser splits water into hydrogen, the hydrogen is stored in a tank for weeks, a fuel cell turns it into electricity for your home, and the water returns to the loop.

Water and honesty

The electrolyser uses filtered, de-ionised water, about 9 litres per kilogram of hydrogen, and the fuel cell returns most of it, so it does not compete with your brewing water. Charging runs on cheap off-peak power or from wind or micro-hydro. Round-trip efficiency is 30% or less, so brewing on stored hydrogen is dearer than brewing on the grid. It is insurance for the batch, not a cheaper way to brew.

Questions

Will my brewing controller lose its step mash programme?

It is designed not to see an outage. The battery and inverter run in UPS mode with no gap, so programmable controllers keep running. Test your own gear in the pilot before relying on it.

Can it handle a big electric element?

A typical home brewing element sits well within 15 kW continuous output, even with the house running. Larger multi-element setups, or brewing while the oven, dryer and heat pump are all running, would be checked in pilot sizing.

Is it cheaper to brew on stored hydrogen?

No. Round-trip efficiency is 30% or less, so it costs more than grid power. Brew on the grid as usual and let the system protect the batch, the fermenters and the kegs during outages.

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