I have an off-grid PV system with some storage, and its main job is to keep my Raspberry Pi server running year-round off-grid. If there is enough spare energy in the system then the network gear (Internet router and FTTC box) are also taken off grid.
What I'd really like next is to take all my night loads off grid, especially but not only during the summer.
My grid-tie system has no storage (yet).
One thing that has been bugging me is that obviously my house draws a bit of power from the grid at night. Not many vampire loads, but the fridge is there all the time. Maybe ~80W average, or 1kWh-ish per night, less in summer.
It would be nice to get to the stage where outside winter where the PV only generates ~1.5kWh/day we never import from the grid, but that's still too pricey to think about.
The Enphase AC coupled storage looks as if it might work for the night loads (so lighting and maybe TV also in winter):
https://enphase.com/en-uk/products-and-services/storage~260W max (which covers all of those non-cooking loads easily) and just over 1kWh effective storage.
And small enough to fit beside the consumer unit that it would wire into.
Still spendy, but I'm thinking hard about it. I can take it with me if we're forced to move, which may yet happen, since the area we are in is being redeveloped.
I can add other stuff in parallel later such as another of the same unit, or something like the Sunamp heat battery.
Rgds
Damon