I have a MP2 and a MPPT 150/35 with 2kWp solar power. I have connected a 14,3kWh battery with Seplos BMS. I charge the battery to 55.2 V and then after about an hour at 55.2V, I bring it down to 54V for the rest of the day. As soon as the battery is full, the excess solar power is fed-in to the grid.
I recognized that if the power is fed-in, the battery power is often not 0W as I would have expected, but alternates between charging / discharing with power up to +-/ 200W instead (charge / discharge cycles).
I use DVCC with voltage sense and already tried to use the MultiPlus instead the BMS as battery monitor.
Are there any suggestions or tipps to become the system more stable if the battery is full?
Thanks and regards