We do the same in Pennsylvania - I have about 10 kwh of battery. I can't put solar on my roof, so I only have a very small 800w array on top of my garden. I run it as an off grid system that can recharge from shore power, so I have to use all of the energy it produces or it goes to waste. But it saves some money and is enough battery to let me time shift to take advantage of time of use power rates, and it gives me very good run time for refrigerators and internet during outages.

There seem to be a few sweet spots in solar - a tiny array that you use all of without having to grid tie it is really cost effective. (The cost of grid tied solar adds 5-10k to the system cost). Otherwise go big. :)