> I don't understand...
I'm thinking that the landlady's "NO!" is based on: (1) You can't save yourself any money by doing this, so why are you interested?, and (2) Complex stuff that she doesn't know or understand about electricity and her property's wiring and whatever you might end up doing might end with her property burned down.
> Complex stuff that she doesn't know or understand about electricity and her property's wiring and whatever you might end up doing might end with her property burned down.
What wiring? Literally connect the setup to the regular power outlet, no fuzzing with wires or otherwise, probably any human who've connected some electrical gadget/device to a socket before could get these solar setups going in a couple of minutes.