zlacker

That could well happen, so, for that eventuality I have a little cardboard box with the old radiator valves and thermostat. The solar panels and the inverters would be a bigger issue though, this all runs locally, not in the cloud (it was a bit of a job to find inverters that do not require a cloud connection, what a nonsense that is). But given that altogether these give the house its A++++ energy label (it is in the top .1% or so for houses of this size and age with respect to energy consumption) I'm pretty sure that buyers would be A-ok with it. Energy efficiency is a massive factor in people's buying decision here (as well as location and general state of the house, obviously).

But your point is well taken and I'll be sure to introduce the subject at the handover if it ever comes to that.

>>jacque+(OP)
Ah well you are in good shape then.

Energy efficiency was my main goal too but no one gives a fuck about that here either so it’s a different market.

>>jamiek+W
Here it's a mandatory disclosure item and it's important enough that you can filter by it on the real estate listing sites. More so because now house insulation comes with a mandatory 'bat study' requirement which is absolutely bonkers. So houses that are already energy efficient are at a premium.

What also helps is that the whole system runs without any user intervention. The manual is mostly aimed at people hired to add stuff at some point in the future, or in case something breaks.