Hussein Al-Sayyed

Hi everyone. Almost a year later and mine was fixed (Actually few months back). I don't know exactly what "he" did (the one who fixed it), but thankfully it was fixed. I rarely open this website but here I am. After reading the latest replies and comments, and from my understanding of what "he" said, I can say it's due to moisture, dust, malfunctioning NTC cables or sensors, short in some places or rust. Mine was most affected by 2 things. first, it mounting position. Although it was in a "semi closed" area where curtains are placed but that was not enough. Second, the batteries position with respect to the inverter. My batteries was placed under it. This in not the best position since as you all know, the batteries produce some gases while functioning (assuming your using lead-acid batteries). These gases affect the board and/or the sensors over time. From his experience dealing with the "same" problem with many others, it was best to reverse the air flow so that the fans does not suck the gases into the inverter but rather drag the heat outside. Technically, I don't know how this might affect its functionality in the long term, but in my area where it is neither that hot during summer nor that cold during winter, "he" said that that was the best solution to solve my particular problem. IT SOLVED  MINE AND ONLY MINE.
 
Warning: This may endanger the inverter if not done by a professional who asses the conditions and environment surrounding the inverter.

Solar Assistant connects to Inverters & Batteries via RS485/RS232/Modbus so there is no WiFi / LAN / Internet / cloud tcp/ip traffic during collection.

@Pacific Zulu Unfortunately, the problem still exists. After searching for approximately 10 days at that time, I saw that a firmware update may solve the problem, but someone said that it might break the functionality of the inverter if something goes wrong. Another said if it's working don't update. I got the newer firmware but I didn't do it. Around a month ago the error code disappeared the way it appeared, without any logical reason. This time, I found that the utility might sometimes have unbalanced phases and the inverter detects that unbalance and act upon it. It seems that the inverter have some kind of bug in the firmware that prevents it from reading the circumstances correctly. The problem did come again few days ago and nothing I can do to fix it yet.

Solar Assistant stores all data locally on the Raspberry PI using InfluxDB.
No data is sent/stored in the cloud.
1) This is a great privacy feature
2) Not affected by internet outages
3) No data missing because in internet line is down

SolarMan Dongle/SunSynk Dongle/CloudLink send data to the cloud and store data in the cloud.

If you have Home Assistant, you can can integrate Solar Assistant with Home Assistant via the mqtt feature.
Only when mqtt is enabled, is data sent real time using mqtt from Solar Assistant to Home Assistant.
You normally run Home Assistant locally on your LAN.

Solar Assistant does have a "proxy" feature that allows you to connect via a URL and view the data on your local Raspberry PI when you on the road.