I have 4 Rolls Surrette S-605 deep cycle flooded 3 cell batteries set up as a 24V system, managed by Victron Easysolar 3 kVA with Color Control.
Basically S-605 is 100% charged at 2.10V per battery cell, ie 25.2V system voltage and 0% at 1.75V per cell, ie 21.0V system voltage.
The only load connected in winter time is the EasySolar 3 kVA with Color Control itself in charger only mode and no other loads via EsaySolar (AC output).
BUT there is a 12 V circuit connected via 24/12 V Orion-Tr-DC-DC-converters-isolated-100 to the battery pack.
The BatteryProtect 65A is before the Orion 24/12 converter.
The only load in the 12V circuit is a modem connecting Easysolar to VRM service. The modem originally used 240Ac- 12V power source but is now connected directly to the 12 V circuitry.
Which BatteryProtect 65A setting would be appropriate to protect the battery pack at -30 degrees Celsius in open air? Had it at the factory setting 21/23 V which led to batteries being totally empty and that almost destroyed the batteries when temp dropped to -28 Celsius.
