The generation of electricity cannot be stored or "saved" because the world does not have the technology to "hold" all that energy yet. Once it is generated, it should be used, or the costs used to generate it would be wasted. The only "wasted electricity" is unused electricity.
There definitively are miners using partially "not-scarce" electricity (like coal/hydro/nuclear power at night when there is low domestic consumption but the plants cannot be "regulated down"). But if only because of Bitcoin mining, existing plants have to work more, or new electric plants have to be built, then Bitcoin "is using
scarce electricity". I am pretty sure that this applies to a majority of miners.
This is still not the same thing as "wasted" electricity. For me, it becomes "waste" if it's innecessary. If we have a PoS or whatever system that can achieve the same grade of security consuming less energy, then the difference is what I would call "wasted energy".
But there is a solution, even if we preserve PoW: Use non-scarce electricity, like renewable-based electricity that doesn't compete with the electricity used for non-mining (domestic/industrial) consumption.
@franky1: I repeat, take a look at Mark Bevand's study. I believe his calculations are the best out there.
mark bevands study was out dated. even in january 2018 he was using ASICS of 2+ generations old.
my numbers were based on the last 12 months. using the 2017/2018 generation miners.
i even broke the costs down to the daily level of the hashrate of the day. worked out asics costs of the day etc.. and then added up the total electric.. (yea i got super anal with the details)
as i showed the OP's source done 54thashrate(54210peta) *365 (yet last week, last month we were not at 54thashrate so his electric use would have been off by alot)
as for the domestic amount per household.
you said
"0.3 kWh per household seems a strange figure ... I guess it's per day, but it seems too low for a day but too high for an hour"
are you saying 300w an hour is high?
...
i just grabbed UK stats
google "Average kWh per day. The average electricity usage per household: Electricity: 8.5 – 10 kWh per day".
8.5/24 = 0.35416kwh 10/24=0.4166kwh
now remember thats just the UK other countries have different amount. yep many countries use even less electric than the UK (world bank 12.6% of houses have no electric)
america do love their bigger houses AC, gadgets and techy stuff.
google: "average American your monthly read 911 kilowatt hours (kWh)"
911pmonth*12/365/24=1.2479kwh (as i said america love their AIRCON)
where as other countries have smaller houses less techy stuff, no AC... did you know aircon is the biggest electrical drainer in most households..
many countries dont have it. so many countries use alot less electric
which backed up by a few stats sites showed the world average was 0.3 per household.
but yea mark bevand using the previous gen asics which were 2-3x less efficient would get a result 3x more then my numbers. but both me and him got numbers below the OP's 1% figure.
yea
in short if mark used todays gen asics and done th maths per day and added up each day.. he would see we are at 0.1% so his math is good. but just outdated.. where as the OP's source 1% math is meant to be recent. but just wrong in many places
the 1% figure had too many flaws to ignore so was worth the time calculating