IUV frequently occured / Algo behavior at the end of charge

[fedi1makni]

Hello
I will provide my setup

• 12V lead acid battery
• 80W panel (16Voc 5A Isc)
• 13.5V charging voltage
• 3A charging current

I am facing two problems:

1. When it's charging the algorithm try to lower the input voltage and increase the output current and it reach the 14.5V (charging voltage+dropoutvoltage) and the IUV occured resetting the charge current to 0 and everything restart so the efficiency of the algorithm is not optimal. did anyone encounter such a problem because i think it happens only with smaller panels
2. How is the behavior of the algorithm at the end of charge cycle. I cannot see any code to pass from phase to phase or lower the current at the CV phase so the controller keep flow high current even the max voltage of the battery is reached

Could anyone support us with this problem?
Thank you again for your cooperation

[fellpower]

I have the same issue with an 3S Liion and a 50W panel (17,6V Vmppt)

no fix yet