My battery bank is a Redodo and I currently have (4) 24v 100Ah batteries string as 48v 200Ah 2P2S connection and the manufacturer told me this:
If you only charge it to 90% SOC, it is recommended voltage after 30 minutes of resting after charging is completed is: 13.6V-13.7V .
You are really right. The difference in batteries will get bigger and bigger during the use process, so it is recommended to balance them every 6 months for better protection and longer use time.
If you discharge them to 50% and then recharge them, the experience of using the batteries is very poor, it is recommended to discharge to 10%-20%, if 20%, the battery will have better lifespan and performance.
With this info about is this really the case? I thought discharging only to 50 r 40% would give me more cycles? I didn't know that not going down to 20% would affect my performance and lifespan. Is this true because I don't see this online when i do a lot of research.
Also redodo states that their BMS starts balancing at 3.5v so with that case do i have to charge up to 56v each time or should i do a safe bulk charge of 55.2V and then maybe do a manually charge of each battery every 6months to the 56v or full charge voltage to get back all batteries internal cells in a balanced state and each batteries reading the same voltage before i reconnect them back in 2P2S?