I regularly bring this up: modern fridges are generally continuous drive (which means they run off DC at some level anyway). And they run all the time(ish).
Waiting for a (mass-)manufacturer to build one with a 48VDC input that anyone can self-install a solar panel and plug-in but switches to a mains-fed 48VDC source as required.
Doesn’t need a battery (the fridge/freezer is one!), gets you some operation during outages, no license required to wire up. Takes advantage of whatever solar is available during the daytime without really wasting any.
Would also love a non-permanently installed doohickey that doesn’t require an electrician to legally install that will gladly push solar into a power strip and handle all the intertie stuff itself.
It shouldn’t be a “whole house or nothing” and a “completely islanded circuit or nothing” dilemma when wanting to partly solarize something. Which I guess Germany has allowed but regulations a big impediment in most places.