When I had my SolarEdge battery installed the installer did say there was a local guy going completely off grid all year round . He has a 40kw pv array and battery . I asked what happened in winter I.e low pv ; apparently if he only generates say 2kw he uses 1 and makes sure he ‘banks’ 1 in the battery .
I think he’s on a mission so no tv , laptop or welder to deal with - presumably no SWMBO also !