I don't think many people know your not supposed to charge agm batteries below 0 Celsius either...CanBat batteries..
CanBat batteries wrote:
3. CHARGE AGM BATTERIES IN THE RIGHT TEMPERATURE
AGM batteries have a certain charge temperature range. This means if the temperature falls outside of this range, you should not be charging AGM batteries. For all types of lead acid batteries, you should avoid charging if the temperature raises above 40 degrees Celsius or 104 degrees Fahrenheit. Cold weather also affects charging AGM batteries. You should avoid charging your batteries if the temperature falls below 0 degrees Celsius or 32 degrees Fahrenheit. Ensuring the temperature is within the range of 0 and 40 degree Celsius is important while charging, in order to ensure the battery lives as long as it is designed to.
Jayco
