We have just finished installation of a Quattro 15KVA, Smartsolar 250/100 with 4KW PV, 400AH lead acid batteries, CCGX.
Set-up should be in ESS and mode: Keep batteries Charged. Load is around 6KW continuous (pump). PV is only 4kW. So our expectation was for the PV to be supplying the load with the grid providing the remaining shortfall. When we tried it, the battery indeed charged the battery. But when the battery reached 100%, the system disconnects the grid and the PV and battery supplies the load by themselves.
We also tried Optimized (w/o Batterylife) mode. But still the same operation: PV and battery supplies the load until it reaches the SOC setpoint. Afterwhich, grid supplies the load and PV exclusively charges the battery. When it reaches 100%, again grid is disconnected by the system and PV and battery supplies the load.
We have updated the firmware of the Quattro and CCGX. But still have to check if the MPPT controller firmware is updated.
DVCC is disabled. Is this the possible reason why it is not working as what we expect for the system to do?
There is no internet connection at the site, so it is quite difficult to troubleshoot with me not there and I am just giving instructions to our installer there.
Hope to hear any suggestions/comments from anyone.