RCinFLA
Solar Wizard
- Joined
- Jun 21, 2020
- Messages
- 3,566
Highly doubt the inverter will glitch release from grid because you set battery AH size incorrectly. When it has actual DC input voltage measurement to rely on why go by a user setting. Shutting down inverter due to reaching low state of charge on Coulomb count or low battery voltage shutdown is another story but that is a longer shutdown, not a glitch. It would also not affect AC pass through.
Most glitch disconnects from grid is caused by inverter circuit AC current overload, in to, or out of grid. This puts a lot of stress on pass-through relay contacts when it releases under inverter surge current limit (about 130 amps AC current for SolArk 15k). It will also disconnect if AC input voltage goes out of range for some time period. Slow variations in grid AC voltage will be tracked by inverter.
Since split phase SolArk is two 120vac inverters in series, a poor input side neutral connection would trip out of range grid voltage. If neutral imbalance is caused by 120 vac loading on output side of SolArk via pass-through this can cause a lot of grid connect glitches as when inverter releases from grid, the neutral imbalance on inverter output 120vac loads is released, so poor input neutral connection caused grid neutral voltage imbalance corrects itself and inverter reconnects to grid again. Then the process repeats.
This is a tough situation for inverter firmware to handle. To keep inverter from destroying its pass-through relay it has to decide to give up at some point and permanently shut down.
Most glitch disconnects from grid is caused by inverter circuit AC current overload, in to, or out of grid. This puts a lot of stress on pass-through relay contacts when it releases under inverter surge current limit (about 130 amps AC current for SolArk 15k). It will also disconnect if AC input voltage goes out of range for some time period. Slow variations in grid AC voltage will be tracked by inverter.
Since split phase SolArk is two 120vac inverters in series, a poor input side neutral connection would trip out of range grid voltage. If neutral imbalance is caused by 120 vac loading on output side of SolArk via pass-through this can cause a lot of grid connect glitches as when inverter releases from grid, the neutral imbalance on inverter output 120vac loads is released, so poor input neutral connection caused grid neutral voltage imbalance corrects itself and inverter reconnects to grid again. Then the process repeats.
This is a tough situation for inverter firmware to handle. To keep inverter from destroying its pass-through relay it has to decide to give up at some point and permanently shut down.
Last edited: