That's frustrating. Doing without the grid makes things more complicated. What consumes the most power in your place? We average around 10kWh per day, but have gas heating and no a/c. So our 10kWh battery can generally keep us going if I charge it up on cheap rate when there is not much sun. Some recent days only got us 1kWh of solar. It is very different in summer when we hardly need the grid.