Wanted to max our power cost about 20k for just the panels got told could only put 14 up but still does not provide what we needed. Asked about the battery at the time was told wait and see. Should not of waited as now batteries are really expensive as only tesla is available the other one's were cheaper. So the power we make extra during the day and don't use even if it is only a small amount goes to the grid and they give us hardly any money for it. Then we pay for power used at night. Not happy as if power cut we do not have power the unit gets turned of.