Home / Australia guides / Hydrogen fundamentals / The hydrogen energy chain: Compact apartment
Australia planning guidance for a specific property and load boundary. Treat shared indoor storage as a constraint, not spare space. H2OME remains in early development.
Electricity first produces hydrogen through electrolysis. Storage holds an energy-bearing gas, then a fuel cell converts some of its chemical energy back to electricity. Power electronics and auxiliary equipment are also part of the chain. Every stage has limits, so output cannot equal the original electrical input.
Water participates in the process but is not an energy source. Returned water does not create perpetual operation. An energy comparison must use the full measured input and the usable electrical output, not a favourable efficiency figure from one component.
Cooking appliances, tumble drying and communal services are outside this illustrative essential load set.
Shared walls, common switchboards and building rules matter as much as the demand inside the flat. A resident does not control the lift, communal pump or fire systems simply because they can list their own appliances.
For a compact apartment, the 1.38 kWh worksheet sits at the final appliance-output boundary. Ask for input-side measurements of the complete conversion chain rather than treating that demand as the electrolyser electricity requirement.
Treat shared indoor storage as a constraint, not spare space. An apartment may be unsuitable for on-site hydrogen equipment. Do not infer suitability from low electricity demand; building permissions, safe separation and professional assessment come first.
All numbers below are hypothetical teaching inputs, not measured appliance specifications or product performance. The topic-specific extra load is separate from the base set; omit it if your real inventory already counts it. This worksheet does not include conversion overhead, protection design or a contingency allowance.
For a compact apartment, assume the selected base loads average 0.13 kW for 6 hours: 0.13 × 6 = 0.78 kWh. Separately, an additional household load at the final electrical output draws an assumed 100 W for 6 hours: (100 ÷ 1,000) × 6 = 0.6 kWh. The combined illustrative demand is 1.38 kWh.
This is delivered demand; producing it through storage needs more input energy once losses are included.
For arithmetic only, if the complete storage chain had a hypothetical 30% round-trip efficiency, delivering 1.38 kWh would require 1.38 ÷ 0.30 = 4.6 kWh of charging input. This is not a measured H2OME efficiency or recovery result. Ongoing demand during charging would add to the required input.
Base operating window: 6 hours. Extra illustrative load: An additional household load at the final electrical output, 100 W for 6 hours. Replace every input with a measured or professionally established value.
In Australia, check connection questions with your electricity retailer and distributor. Use electrical professionals holding the licence required in your state or territory, and ask the local council about relevant siting, building and water-use requirements. Energy Made Easy covers New South Wales, Queensland, South Australia, Tasmania and the Australian Capital Territory; outside those jurisdictions, check the relevant state or territory consumer energy comparison resource. Compare your actual tariff and charging window, not an assumed national rate. This guide does not claim to know a particular state's approval process.
For life support equipment in Australia, keep life support registration current with the electricity retailer or distributor as applicable and confirm how the other party is notified. Follow your clinician and equipment provider's contingency plan. Registration is not a guarantee of continuous electricity, and H2OME cannot replace an independent medical contingency.
H2OME is in early development. Its 10 kW output figure is a design target, not a proven specification. There is no confirmed price, certification, commercial availability or guaranteed runtime in this guide.
Hydrogen is an energy store, not free energy. Grid input, wind and micro-hydro are the charging options considered here. Each requires its own supply assessment. Do not install hydrogen equipment, modify fixed wiring, bypass protection or improvise a connection from this guide.
These official resources provide energy, consumer and technical background. They are not endorsements of H2OME, proof of its performance or a substitute for site-specific professional advice.
Shared walls, common switchboards and building rules matter as much as the demand inside the flat. A resident does not control the lift, communal pump or fire systems simply because they can list their own appliances. Treat shared indoor storage as a constraint, not spare space.
No. The 1.38 kWh total is an illustrative demand worksheet, not a runtime result. Actual appliance measurements, usable storage output, starting demand, conversion overhead and reserve limits are needed. The 10 kW design target is not demonstrated output capability.
In Australia, check connection questions with your electricity retailer and distributor. Use electrical professionals holding the licence required in your state or territory, and ask the local council about relevant siting, building and water-use requirements. Energy Made Easy covers New South Wales, Queensland, South Australia, Tasmania and the Australian Capital Territory; outside those jurisdictions, check the relevant state or territory consumer energy comparison resource. Compare your actual tariff and charging window, not an assumed national rate. This guide does not claim to know a particular state's approval process. Use the worksheet to brief the relevant professionals, not to install, modify or operate hydrogen equipment.
Ask us about H2OME, tell us about your property or register your interest in the proposed system. We are in early development. No payment or purchase commitment; contacting us does not guarantee a pilot installation.