expected normal voltage drop from load?
Is there a rule of thumb or guidance for an expected voltage drop based on amp load on a pair of 6V GC batteries? I was tinkering in my trailer this weekend and ran a 750 watt AC electric heater off ...
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I had a similar experience when I had two costco GC batteries in my previous camper. Voltage sag to below 11V with 750-1000 AC watt load on inverter.
Currently I have 3 Group 24 so I decided to run the same experiment. I shut off the charger, turned on the inverter, powered up a 750 watt electric heater. Batteries were at Float voltage so when I turned off the charger so I gave them a few minutes to settle down to 12.8 volts before I turned on the heater. I ran the heater for 1 minute. Voltage sagged and stabilized in the last 15 seconds at 11.84. Then I turned off the heater and voltage rebounded to 12.5 volts.
I am not a fan of group 24's but that is what fits in my battery space. However, they did perform better that the 2 GC's under high load conditions. The 3-24's are roughly equal in capacity to the 2-6's
Currently I have 3 Group 24 so I decided to run the same experiment. I shut off the charger, turned on the inverter, powered up a 750 watt electric heater. Batteries were at Float voltage so when I turned off the charger so I gave them a few minutes to settle down to 12.8 volts before I turned on the heater. I ran the heater for 1 minute. Voltage sagged and stabilized in the last 15 seconds at 11.84. Then I turned off the heater and voltage rebounded to 12.5 volts.
I am not a fan of group 24's but that is what fits in my battery space. However, they did perform better that the 2 GC's under high load conditions. The 3-24's are roughly equal in capacity to the 2-6's
