battery choice
Hi, I am in analysis paralysis. I will be purchasing AGM jars. Here are my two choices: AGM L-16 Surrette 400 amp-hour six volt with 0.145 plates cost $520 plus tax and shipping Four are n...
Forum Discussion
According to Victron,
14. Effect of temperature on charging voltage:
The charge voltage should be reduced with increased temperature. Temperature compensation is required when the temperature of the battery is expected to be less than 10°C / 50°F or more than 30°C / 85°F during long periods of time.
The recommended temperature compensation for Victron VRLA batteries is -4 mV / Cell (-24 mV /°C for a 12 V battery). The centre point for temperature compensation is 20°C / 70°F.
15. Charge current:
The charge current should preferably not exceed 0.2 C (20 A for a 100 Ah battery).The temperature of a battery will increase by more than 10°C (18F) if the charge current exceeds 0.2 C. Therefore temperature compensation is required if the charge current exceeds 0.2 C.
... so again, it appears to be about battery temps.
What I like about the vector charging profile, like that of the vec1093dbd, is voltage rises steadily throughout the entire charge cycle... only to reach the voltage set-point at near full. These lower voltages may very well act as a sort of temp comp, and thus help reduce overheating.
14. Effect of temperature on charging voltage:
The charge voltage should be reduced with increased temperature. Temperature compensation is required when the temperature of the battery is expected to be less than 10°C / 50°F or more than 30°C / 85°F during long periods of time.
The recommended temperature compensation for Victron VRLA batteries is -4 mV / Cell (-24 mV /°C for a 12 V battery). The centre point for temperature compensation is 20°C / 70°F.
15. Charge current:
The charge current should preferably not exceed 0.2 C (20 A for a 100 Ah battery).The temperature of a battery will increase by more than 10°C (18F) if the charge current exceeds 0.2 C. Therefore temperature compensation is required if the charge current exceeds 0.2 C.
... so again, it appears to be about battery temps.
What I like about the vector charging profile, like that of the vec1093dbd, is voltage rises steadily throughout the entire charge cycle... only to reach the voltage set-point at near full. These lower voltages may very well act as a sort of temp comp, and thus help reduce overheating.
