DaHawg
New Member
Hello,
I am new to the forum, but have been learning from Will for a few years.
I put together a little system with 8 100 ah AGM batteries with 1.2 kw in panels. I have a SmartSolar MPPT 100/50 Charge controller, the 712 shunt and the Victron 8 amp AC charger.
More hardware:
My 800 Ah AGM battery bank:
4 batteries are two years old but were 80% charged when I put them back into my system. I also purchased 4 new of the same type AGM batteries from Amazon. Specifications: Voltage: 12V Amperage: 100 Ah Chemistry: SLA, AGM
I have them in a series/parallel config for 24 volts.
My issue: I ran a 2 Amp load for 7 hours and my Victron battery monitor shows my systemat a 98% state of charge, but my voltage was down to 24.66 vdc. This is the under load voltage and I have read thai should mean around a 65% SOC.
I should have 400 Ah's to use and stay at 50%, but I'm almost there after only 30 Ah's.
I really don't know what to ask, but this math does not add up for me.
I am planning on breaking my two sets of batteries apart, new vs old, and test again.
I want to see if there is any performance difference between the two sets.
Thanks for reading...
I am new to the forum, but have been learning from Will for a few years.
I put together a little system with 8 100 ah AGM batteries with 1.2 kw in panels. I have a SmartSolar MPPT 100/50 Charge controller, the 712 shunt and the Victron 8 amp AC charger.
More hardware:
My 800 Ah AGM battery bank:
4 batteries are two years old but were 80% charged when I put them back into my system. I also purchased 4 new of the same type AGM batteries from Amazon. Specifications: Voltage: 12V Amperage: 100 Ah Chemistry: SLA, AGM
I have them in a series/parallel config for 24 volts.
My issue: I ran a 2 Amp load for 7 hours and my Victron battery monitor shows my systemat a 98% state of charge, but my voltage was down to 24.66 vdc. This is the under load voltage and I have read thai should mean around a 65% SOC.
I should have 400 Ah's to use and stay at 50%, but I'm almost there after only 30 Ah's.
I really don't know what to ask, but this math does not add up for me.
I am planning on breaking my two sets of batteries apart, new vs old, and test again.
I want to see if there is any performance difference between the two sets.
Thanks for reading...