I have a 5K PV system on my roof. It cost me $40K. At the current rates for electricity, it'll pay for itself in about 5 yrs. It also helps keep the house cooler. The house is in SoCal (farm is in Missouri, yea.... I know ... that's a long walk in from the pasture.) I'm tied to the grid & use it as my battery bank. Much cheaper that way... no battery maint.