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Screen seems dead,Inverter working but what if I want to change a configuration? Is there a pc software I can make configurations from ,or I should start looking to repair

For sale made in Germany, StecaGrid 5011_2 KATEC 5kW Brand new,never used ,just open box and tested on wall once I bought it 1600 eur mistakenly,i needed offgrid and i am selling it 900 eur ship from Greece with UPS manual

I have 18 (2x9) ,400 watt panels and I am planning to add 6 more,due lack of space for the car charger on heavy cloudy days. The fuse box combiner have 3 imports Can I add the 6 panels at the 3rd import and have 2x9 & 1x6 or I need to change the other two and have 3x8?

Previous post was incomplete, i am making new one with more details. This is my first solar system installation and I guess i bricked my inverter i dont know if it is my fault i am pretty sure that i followed all the instructions carefully At Powland site i found that for "batteryless firmware"...

I purchased the inverter online and i cant have any help from the seller or from Easun neither I bought it as "batteryless" offgrid inverter I connect it with pv output of around 300 volts but I didn't got any watt . After some research I found that the model needs to get updated to work...