hi, I have 2 growatt 48v 3000 tl lvm units wich I set up on split phase to get 240 vac. They work fine when running on solar or batteries. But when i hook up the utility generator it keeps showing error 16 . I have try using 10 awg and awg 8 wire when connecting the generator but no succes , I have review the ac frecuency on the generator and it is running 60+-1 hz, any leads?