May 5, 20233 yr Hi. I have a problem and I don't know where to start looking as I can not get the batteries on Smart Bess. The inverter is an 8kw Deye with 3 x CFE 5100s and 12 x 550watt panels. Everything was running good for 3 months now all of a sudden the batteries goes into fault and solar production cuts to 0.00 watt. The whole day they run perfectly then around 17:00 solar production fell from about 600 watt to 0.00 and batteries went into fault. What I did notice DC temp was sitting at around 47 - 48 then as the solar production got less the temp started to climb it was sitting at 53.70 and within 10min up to 54.40. I don't know if that can be why the batteries go into fault.
May 6, 20233 yr Temp may be the issue, need to establish why its going up. Which mode is your setup on. SUB/SBU?If SUB, check max charging current set on invertor-could be too high. If SBU check load at time of switchover from PV to Bat. maybe to high. if nothing is amiss, for starters, I suggest a reboot of the system. (the correct way)
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