alt Hacker NewsAmericans basically live like energy is unlimited, free and has no side effects, the rest of the world doesn't have that chance, last time I checked the average US household used anywhere between 3x and 4x more electricity than the average EU household
They tend to prefer huge houses with relatively complex designs (less optimal in term of area/volume ratio) / poor insulation, they make up for it by relying on tech for heating/cooling pretty much year round.
Your tankless water heater is a good example of something that is completely inadequate for solar setups, they draw insane amount of energy over very quick period of time. But I think that's the core of the issue, if you want to keep all the nice things modern American houses have you're going to need a lot of money and a lot of sun. On the other hand if you're a bit more frugal, with so called "passive house", you can get by with a much smaller setup.
> I will note in passing that both our dishwasher and our microwave oven require 20A circuits
And a tankless heater will need 5 times that, unless you're using gas but I wouldn't count that in a "modern first world 21st century home".
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"Americans basically live like energy is unlimited, free and has no side effects ..."
Agreed - and guilty as charged which is why we're switching entirely to solar.
(I will also note that my household "cheats" by living in California where we need relatively little heat and do not even own an air conditioner so our path is, perhaps, a bit easier)
My main point is that whether you're a frugal EU council house or a profligate Texas McMansion, we - all of us - will continue to invent new demands for energy and continue to trend towards more energy used per person per unit time.
Therefore, if you're looking ahead to deployment of solar resources you should be realistic about that trendline.
"Ordinary European household" will change even lower :
Crisis of 2008 made EU to think about resiliency so they asked all kinds of economists, physicist, other science people what should be done to provided that and one of those things implemented was building energy efficiency directive [https://energy.ec.europa.eu/topics/energy-efficiency/energy-...]
which progressively increased demands on building sector to provide citizens with "low energy" housing. and currently most states of EU have requirement to build houses where defacto energy need for yearly heating of a house is lower then energy yearly demand for hot water (hot ater can not be lowered significantly without heat pumps - COP3+)
> Your tankless water heater is a good example of something that is completely inadequate for solar setups, they draw insane amount of energy over very quick period
I know nothing about any of this, so please educate me for the good of us all - wouldn't this logically be a use case for a battery? IE: solar (or wind or whatever...) feeds a battery that feeds the tankless water heater. As a layperson, it would seem to me like the issue isn't generation but rather availability at the moment of demand - which would be the case in any kind of micro generation, right?