I have built a 8P Li+ 18650 Battery pack and charging it through a MPPT Bq2589x Charger IC, the Issue I have found is the battery pack is not delivering any Voltage below ~3.5V, I suspect any Balacning to be done for the batteries, But its parallel charging, Is that balancing still needed.
P.S: The batteries are of Same chemistry from SAMSUNG, Type:ICR and it had been charge for full, Before when it is used with the MPPT charger.
