Leaving unit plugged in 24/7
Who leaves their unit plugged in 24/7. Just bought a new 2017 Montana, 3rd 5th wheel, 5th Rv. I have a 30amp pole at my home that I leave my unit plugged into all the time. Ive done this with all m...
Forum Discussion
Rich,
What you're mentioning above probably does not apply to AGM dry lead acid batteries, as no gases or fumes of any kind leave them unless their internal pressure gets high enough to force their one-way valve open a bit here and there.
To open this valve would most likely take higher continuous voltages than the common 13.2 float voltage value at just about any temperatues one could stand to drive in or camp in.
However, it looks to me like the internal chemistry in AGM batteries can in fact be adjusted by design. For example, I matched my AGM batteries' 77 degree recommended float voltage to my charger's nominal 77 degree output voltage to make sure my batteries's valves would most likely never open during long floats at all conceivable ambient temperatures. This 77 degree float voltage value for my batteries is 13.6 volts, not the common liquid acid float voltage of 13.2 volts. I did not purchase Lifeline AGM batteries because their specified float voltage was the common 13.2 volts used for liquid lead acid batteries. I called them and they refused to budge on this specified float voltage - stating that their AGM batteries would slowly "dry out" (i.e. lose water vapor throuugh their one-way valve) over time if floated at 13.6 volts over their lifetime. Hence, I purchased another brand of AGM battery.
What you're mentioning above probably does not apply to AGM dry lead acid batteries, as no gases or fumes of any kind leave them unless their internal pressure gets high enough to force their one-way valve open a bit here and there.
To open this valve would most likely take higher continuous voltages than the common 13.2 float voltage value at just about any temperatues one could stand to drive in or camp in.
However, it looks to me like the internal chemistry in AGM batteries can in fact be adjusted by design. For example, I matched my AGM batteries' 77 degree recommended float voltage to my charger's nominal 77 degree output voltage to make sure my batteries's valves would most likely never open during long floats at all conceivable ambient temperatures. This 77 degree float voltage value for my batteries is 13.6 volts, not the common liquid acid float voltage of 13.2 volts. I did not purchase Lifeline AGM batteries because their specified float voltage was the common 13.2 volts used for liquid lead acid batteries. I called them and they refused to budge on this specified float voltage - stating that their AGM batteries would slowly "dry out" (i.e. lose water vapor throuugh their one-way valve) over time if floated at 13.6 volts over their lifetime. Hence, I purchased another brand of AGM battery.
