Greetings,
I'm a newbie in working with lithium batteries and I'm hoping that your collective expertise can assist in answering my question. My apologies in advance if I have posted this to the wrong section and if so, please move me to the correct section.
I built a 3300W solar generator and recently upgrade the batteries from a 50Ah AGM to 40 14.4v 6.6ah 95.04wh Li-Ion Module with BMS from BatteryHookup.com to give me 3802Wh of power. Each of the 40 batteries consists of a 4s3p 14.4v 6.6ah already made battery pack each with a working BMS. I have connected the batteries into 3 strings consisting of parallel connections for each of them with 14, 14, and 12 batteries respectively (see pictures) and then all three strings are parallel connected to give me an overall battery pack of 14.4v, 264 Ah, 3802 Wh (which at the time was a steal for $280!).
I have a 30A solar controller that I will be using with 300W of solar panels for solar charging and I am planning to also connect a 20 A Drok Adjustable Voltage DC Power Supply to the PV inputs on the solar controller to charge the batteries with AC power for regular charging.
BatteryHookup.com recommends keeping the charge and discharge limited to 3 amps per pack or 0.5C. So my question is, given that there are 40 of the individual battery packs each with their own BMS and that all 40 packs are parallel connected, what is the recommended amperage I can push from the Drok power supply through the 30A solar controller to the collective string of batteries? I was thinking of pushing 20A into it since it would be spread across the 40 individual packs, thus keeping with the .5c recommended by BatteryHookup.com. The current would be pushed to the batteries via a 30A fused connection with 10 gauge wiring. Is my thinking correct? Any advice you can provide would be greatly appreciated.
Sincerely,
eas1906
I'm a newbie in working with lithium batteries and I'm hoping that your collective expertise can assist in answering my question. My apologies in advance if I have posted this to the wrong section and if so, please move me to the correct section.
I built a 3300W solar generator and recently upgrade the batteries from a 50Ah AGM to 40 14.4v 6.6ah 95.04wh Li-Ion Module with BMS from BatteryHookup.com to give me 3802Wh of power. Each of the 40 batteries consists of a 4s3p 14.4v 6.6ah already made battery pack each with a working BMS. I have connected the batteries into 3 strings consisting of parallel connections for each of them with 14, 14, and 12 batteries respectively (see pictures) and then all three strings are parallel connected to give me an overall battery pack of 14.4v, 264 Ah, 3802 Wh (which at the time was a steal for $280!).
I have a 30A solar controller that I will be using with 300W of solar panels for solar charging and I am planning to also connect a 20 A Drok Adjustable Voltage DC Power Supply to the PV inputs on the solar controller to charge the batteries with AC power for regular charging.
BatteryHookup.com recommends keeping the charge and discharge limited to 3 amps per pack or 0.5C. So my question is, given that there are 40 of the individual battery packs each with their own BMS and that all 40 packs are parallel connected, what is the recommended amperage I can push from the Drok power supply through the 30A solar controller to the collective string of batteries? I was thinking of pushing 20A into it since it would be spread across the 40 individual packs, thus keeping with the .5c recommended by BatteryHookup.com. The current would be pushed to the batteries via a 30A fused connection with 10 gauge wiring. Is my thinking correct? Any advice you can provide would be greatly appreciated.
Sincerely,
eas1906