Re: General Discussions
Reply #2558 –
For a sparse and largely unpopulated country like Australia hydrogen in either ICE or Fuel Cell will eventually become the fuel of choice as you can transport, store and pump it largely like traditional fuels. It just won't ever make sense to roll out recharging infrastructure in regional areas it where will barely be used.
Cities are a different issue, and I expect at home off grid overnight charging to become a thing once battery and SolarPV technology get to a sensible point of efficiency and capacity but it's no even close yet. In my own area the power companies have already replaced two substations in the last year due to overload failures at night, prior to that they had replaced one in the last two decades.
My R&D associates tell me retail SolarPV efficiency has to double, while the energy battery storage has to increase in both reliability and longevity while the cost per kilowatt falls. In effect you need each and every "average" house generating and storing about 20kW of clean energy per day in winter. At the moment most home roof space taps out at between 6kW and 10kW maximum in summer, a big sun facing roof might deliver 15kW in summer but the average for a 15kW install is about 11kW.
ps; By average house they mean parents and two children average, two cars, gas stove and water, no boat or pool, for all electric the daily requirement increases to 24kW. My understanding this is also qualified for suburbia, where vehicles might not need travel a full charge range each and every week.
Too often figures get quoted that are for the latest all singing and dancing passive heat design(airtight), double glazed, insulated floor, wall and ceiling dwelling, but that is not even 1% of the Australian market. In my area there are only two completed homes like that out of about 10,000, with a couple more planned, and they cost about 3x a typical build, not really viable is it? At the normal rate of replacement, it will take approximately 50 years to convert 80% of the dwellings. Ironically, in one of those homes, after all the trouble getting the design, approvals and build right, the people love having the windows open which effectively defeats the concept!