So back on topic after everyone else’s prepaid drama.
Happy to report the Geyser that Home Assistant turned off at sunset (17:50:33) was warm enough for me to have a perfectly normal shower after wife and two kids and been through a shower and shared bath.
Even had water hot enough to wash the dishes without an issue.
I do anticipate winter proper will be a bit of a different story, but we’ll see when we get there.
Mornings in winter will also be another matter as I’ve simply set it to turn back on when the sun comes up, it will eat some remaining battery and maybe switch to grid even if it’s too low but we’ll see in time.
Of course it being sun based means it will be dynamic but generally we don’t do crack of dawn showers and such anyway.
I have setup a delay timer to let it run for 1 1/2 hours if manually overridden at night, but as I type this I’m probably going to make than 1 hour.
Already pretty much decided downgrading from a 3kW element is just a waste of money. Maybe if it dies I’ll consider something more efficient and fancy.
21:15 now and battery at 38% which means 18% to go before grid pops in to help out. Obviously with PV only being turned on mid day and running it low last night on purpose this isn’t going to be the norm.
Of course it’s also not winter proper yet so no heaters and hence 500W-odd load I might make it through.
One thing that I do find annoying is that nowhere do you see your battery capacity as in kWh available, so I just work out my usage estimate by hand with calculations and that just seems daft.