Sol-Ark › GEN port and two-wire generator start relay
Solar backfeeds generator on grid input during outage
reported in the field
Symptoms
- On a grid-tied 15K with a Generac Guardian (over the 80 A GEN-port limit) through an ATS on the GRID input and GEN Connect to Grid Input checked, opening the grid disconnect to simulate an outage showed solar backfeeding the running generator
- Sol-Ark support replaced three MCU boards and then the entire inverter and it still happened, and support could not say why
- An installer of about twenty 15Ks added that with sell off the units still push a split second of export when the battery hits 100% and the load dips, limited but not removed by the 500 W export-limit buffer
The cause and the fix
Subscribers see the cause, the fixes that worked and who did them, part numbers and recent prices when a part is involved, and the field reports behind this entry.