onobeka

That’s true. The inverter interior space is very tight. I did not notice other differences so far.

Thx! I will probably replace it every couple of years. AFAIK there is not really much better/safer capacitors to use. I personally do not like too much this solution, because there is indeed a risk of a short circuit. OTOH, I did not care so much about the display (my only issue), because for monitoring I have Solar Assistant and the whole cloud (Solar Power, Watch Power). For modifying settings, Solar Assistant is not helping too much, some settings work some are "rejected". The same settings do work in the 'cloud' apps at the very same time, however in an emergency situation is best to also have the display. If it were the top line of the LCD that would be affected by this issue that would not be an issue either, but it's the bottom line in which you have to see the values and text. Going blind by number of 'button presses' is no option as it is not always that reactive, sometimes you need to press multiple time to have an action carried out. I've also measured the voltage in case the inverter is stopped. Right after cutting all the power (AC-in/out, Battery and last PVs) the voltage across PV+/- is 6V and decaying 1V per second.

I’ve installed the capacitor two days ago. The problem of the LCD is solved. I’ve waited before reporting back just to be sure. We’ve had days with sun and clouds and those high irradiation when the sun comes out of the clouds, so big stress on the unit. The lcd indications did not even budge. I’ve used a film cap 2.2uF, X2, 630V DC by Kemet. As I only have 240VOC per string this should pe plently. A 3.3uF would also fit behind the screen. I’ve installed it as indicated in the document. Thank you very much Coloumb!

Thx. I guess it does not necessarily need to fit inside the unit, behind the display, provided it has to be wired in parallel with the PV+/-. It could be in the lower part of the inverter or even in the DC fusebox, as this one is about 0.5m away from the inverter. Yes, it is a dangerous charge, but when I need to work on the inverter or panels I will separate the panels by their DC fuses and breaker, if there is charge in the capacitor the imverter would consume it right away as it was solar. Is there an issue if the capacitor is not right in the unit as long as it is added with short and decently thick wires?

Thx. I did not notice the MCU indication. Even so, I would not know where to find the software other than googling around. It should probably be somewhere in the Download section right? I did check there, not particularly for the MCU and I did not remember to have seen it. I will check again. Regarding the capacitor mod, I will do this probably next week provided I can source the capacitor. I could get something like this: https://www.conrad.com/p/wima-mkp-4-33uf-10-630v-rm375-1-pcs-mkp-thin-film-capacitor-radial-lead-33-f-630-v-dc-10-375-mm-l-x-w-x-h-4-1569435, would that work? PS: In the document, a backing plate is also mentioned, but I have not found any information despite my searches. Making a baking plate out of steel or aluminium would be simple, I guess it should also be grounded, right? If I recall correctly some form of a backing plate behind the display module already exists, I will need to check and report back.

Thank you, where could I find new software for it? Thx! My current software version is 76.01, the latest one I could find in the downloads section is 74.02. However, looking in the section I found this , which suggests adding a capacitor across the PV inputs for solving also the screen flickering issue. As I have noticed, after a restart the issue is gone until the inverter reaches a certain load (big). In my case this load is solar charging the battery. Initially I thought it's a loose connector of the LCD screen and the cable being the airflow or something dilating and contracting. Reading that document makes me want to try that capacitor mod. What do you think?

Related to the original problem, I have the same, on an Easun Igrid SV IV. I wrote to Easun Support and they've recommended to open the inverter and check if the LCD cable is loose. While doing that, when removing the front cover, the two cables connecting to from the mainboard to the front cover, which holds the display, got a bit tensioned. I've started the inverter with the front part still connected but not attached, everything was working. All the cables and sockets are attached with glue/silicon, so I could not really check anything. I've put the front cover back and the display was working properly ... until next day when the production started rose over 3000W, the issue reappeared immediately. I am not saying that there is an issue of going above 3000W, because it did that before many times before without the artefact issue. I believe that the issue appears due to the cooling current done by the fans when the inverter is under load (either charging or discharging) and then something moves inside. Unfortunately it does not cure itself over night or with a restart, so I doubt it's temperature related, rather something mechanical with the cabling. As far as I looked when the front panel was off, it seems the LCD cables (two of them) are a bit squashed between the front cover with the LCD and the rest of the inverter.