Battery SOC Low - Voltage Normal
Hi All. I'm new here so go easy on me. I've Googled for hours but can't find any solid answers. My setup is in my signature. So here's my issue.... Whether plugged into shore power, running my ...
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I would check water, separate the batteries, and try all of that again, one at a time, to find the bad battery. BTW, 13v is higher than a full battery at rest should be, right? I though 12.7 or so is fantastic. But, if you're noticing a bigger voltage sag under a load than usual, something's not right.
Maybe your % of charge is based on having a charge hitting it. Voltage only reading to indicate state of charge requires disconnecting charger and load for something like an hour. If you find a battery with a bad cell, you can try zapping it with an equalizing charge, which is just a higher charge, like 15v. Then run that battery down and do it again, it just may bring the low cell up, but it's kind of a slim chance. I always try the pulsing, desulphating charger, too, which is also a slim chance, but has worked to give longer life to an uneven battery. Be sure to add water after several equalizing charges, since it will gas it out during the process.
Maybe your % of charge is based on having a charge hitting it. Voltage only reading to indicate state of charge requires disconnecting charger and load for something like an hour. If you find a battery with a bad cell, you can try zapping it with an equalizing charge, which is just a higher charge, like 15v. Then run that battery down and do it again, it just may bring the low cell up, but it's kind of a slim chance. I always try the pulsing, desulphating charger, too, which is also a slim chance, but has worked to give longer life to an uneven battery. Be sure to add water after several equalizing charges, since it will gas it out during the process.
