apctjb
Solar Enthusiast
- Joined
- Jun 16, 2020
- Messages
- 480
I would like to fine tune my charging settings to maximize the cycle life of my LiFePO4 battery bank (2p16s 280AH cells). Solar is the only charging source.
Following the recommendations on this forum I initially set bulk to 56.4V (3.53) and float to 54V (3.38). With those settings I noticed that my battery bank was maintaining 54V or greater most of the time, which I also had read on this forum is a no-no for LiFePO4. So I lowered settings to 55V (3.44) bulk and 53.8V Float. The graph below shows my battery voltage during the course of the day. While the graph varies day to day, this is representative of the voltage range for my battery.
As you can see below with bulk at 55V and float at 53.8V, my batteries are still above 54V a fair amount of time and never dropping below 52.5V.
I don't have a SOC meter but estimating SOC using the voltage chart I have seen on this forum it appears I am maintaining my battery bank between 80 and 99% SOC most of the time, and wondering if that is really ideal for maximizing cycle life?
Would love to hear from others what battery voltage range I should be targeting to maximize cycle life.
80
Following the recommendations on this forum I initially set bulk to 56.4V (3.53) and float to 54V (3.38). With those settings I noticed that my battery bank was maintaining 54V or greater most of the time, which I also had read on this forum is a no-no for LiFePO4. So I lowered settings to 55V (3.44) bulk and 53.8V Float. The graph below shows my battery voltage during the course of the day. While the graph varies day to day, this is representative of the voltage range for my battery.
As you can see below with bulk at 55V and float at 53.8V, my batteries are still above 54V a fair amount of time and never dropping below 52.5V.
I don't have a SOC meter but estimating SOC using the voltage chart I have seen on this forum it appears I am maintaining my battery bank between 80 and 99% SOC most of the time, and wondering if that is really ideal for maximizing cycle life?
Would love to hear from others what battery voltage range I should be targeting to maximize cycle life.
80