mine allways stops pumping to grid i get state 567 error all the time because the voltage on the net work is to high so on sunny days everyones solar cranks volage goes up soon as it hits 250 volts it says state 567 and stops exporting to grid got to call power network they will ajust upto 255 volts then hopefully it will be good but for 11c a kwh then getting charged 40 back might as well let it go to waste or get battery was qouted 15k for 14 kwh battery rip off that was with rebate told them to fuck off