Strange MPPT fluctuations SmartSolar Charge Controller

Good evening,

The output of my solar charger fluctuates from the moment the output power exceeds +/- 1000W. This is clearly visible on today’s and yesterday’s graph coming from Home Assistant. Also a detailed screenshot from VRM shows this. Today and yesterday was sunny without clouds.

Anyone have an idea what could cause this?

My installation details:

  • SmartSolar charge controller MPPT 250|70 -Tr VE.Can (firmware v3.16)
  • 4 x Jinko 435W solar panels in series (JMK435N-54HL4R-BDV)
  • 48V system:16 x EVE280 Ah LiFePo4
  • JK-BMS connected via CAN
  • Multiplus 2 - 48/3000/35 (ESS active)
  • Cerbo-S GX (firmware v3.54)
  • DVCC, SVS, STS, SCS active

Thanks in advance for your responses.



I think you and I may have the same problem…