Dennyha
Well-known member
For my system, I have four 6 volt batteries, each one is 240 amp-hours. They are wired in series-parallel for 12 volts, and a 480 amp hour total capacity. My system is 400 watts on the roof, a Trimetric battery monitor, a Bogart Engineering controller, and a Go Power 2000 watt PSW inverter.
I very closely follow my battery status using the battery monitor. This past weekend, I noticed that when I would get down to about 75% of battery capacity, my voltage was down to about 11.7 volts. I've always heard you could discharge down to no lower than 50% of battery capacity safely. Why is the voltage dropping so much. My four batteries are Crowns, purchased directly from the factory in Ohio. I check the water level regularly, and fill to the appropriate level. I've never had the level in any cell get anywhere close to exposing the plates.
Is this normal?
I very closely follow my battery status using the battery monitor. This past weekend, I noticed that when I would get down to about 75% of battery capacity, my voltage was down to about 11.7 volts. I've always heard you could discharge down to no lower than 50% of battery capacity safely. Why is the voltage dropping so much. My four batteries are Crowns, purchased directly from the factory in Ohio. I check the water level regularly, and fill to the appropriate level. I've never had the level in any cell get anywhere close to exposing the plates.
Is this normal?