Comments by "Chaos Corner" (@chaos.corner) on "A simple water heater is more clever than it seems" video.

One option to employ is a post-heater mixer. This allows you to have much hotter water in the tank without making it dangerous for people using it. This means that in a shower, you use much less hot water per second and can get more time out of the same size of tank. I've actually been looking at one of these because there is not actually much space between "not hot enough for safety" and "too hot for safety". With this, you can move the heater to heat "too hot for safety" but have the water coming from the hot tap be fine.
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@thedave1771 Over-hot water is also dangerous for some elderly.
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@HagarTopeka1 Good point. I think I must have heard that in the context of energy storage but he does mention extending the capacity too.
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When we bought our house, the previous owners had left the water heater on and nothing else. This showed up on the electric bill and it was trivial. Unless you're pulling that "only heat when the power is cheap" thing, it's not worth turning it off.
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