[lostapathy]

I'd be willing to accept not discharging my solar system's battery to the grid when not in use, I can use it at night.

One can get a UPS affordably that will power 1500 watts of continuous power. Being able to supply just that much, or twice that much, from solar panels in a grid-down scenario would be tremendously useful, even if it's not enough power to fire up my welder.