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The SmartSolar MPPT 100/50 goes through Bulk, to Absorb, and to float correctly. The documentation says that if the voltage stayes below the float voltage for more than 1 minute, it will return Bulk. I get into float by noon, by 4PM, we are easily .3V below float but it is still in Float. I need to stop and start the controller to get it back to bulk.
If you leave the charger till the following day, does it start the morning in Bulk?
Hi Lee,
You might want to try manually upgrading to the new v1.42 firmware that is slowly being rolled out.
You can download the required firmware file from Victron Professional:
https://professional.victronenergy.com/accounts/login/
And the instructions to manually update firmware are in the VictronConnect online manual;
https://www.victronenergy.com/live/victronconnect:start
With v1.42 the re-bulk voltage is set to 13.4v by default (for a 12v system) and if you use the lithium charging preset then absorption voltage will be set to 13.5v. Accordingly anything more than a 0.1v drop below absorption voltage should trigger re-bulk.
In the near future VictronConnect will also be updated with the ability to manually configure the re-bulk voltage or offset to absorption voltage.
