On 2022/05/05 at 6:59 AM, Creatura said:

I forgot to mention, that if there is no pv input, the paralel works very good, no light flick.

Each inverter has 8 solar panels (380w solar panel) in series, and the 8 solar panels are connected on paralel with another series (total 16 solar panels for each inverter)

 

So its 8sp2 for each inverter, i did something wrong with pv input?

Only when its sunny outside the lights flicks

375W panels in 8s2p (276.8Vmp, 21.8Imp for LR4-60HPH-375M) totals 6,000W i.e. 20% above the 5000W maximum PV input power and 3.68A above the 18A maximum input current - going by InfiniSolar V II 5KW specifications.

Ordinarily this shouldn't be a problem but considering that "if there is no pv input, the paralel works very good, no light flick" and "Only when its sunny outside the lights flicks" then you could probably be maxing out the power or current of the SCC. Try 10s1p for a higher operating voltage, lower current and 3750W max per string. 

So i can go maximum 12P  the distance is around 50m of cable 6mm 

I will try that if it works then i have to buy 1 more inverter to be able to use all solar panels

3 hours ago, Creatura said:

So i can go maximum 12P

Do you mean 12S for 12 panels in series?  If so then you will most likely exceed the 450Vdc limit and destroy your inverter.

What are your panel specs? Please post the electrical characteristics (Voc, Isc, Vmp, Imp) here.

Edited May 10, 20224 yr by Kilowatt Power

Hello guys

I have the same problem with my both paralleled inverter from Easun, the error F72.

do you find a solution to solve it ?

thanks for you answers 

8 hours ago, Steph40 said:

the same problem with my both paralleled inverter from Easun, the error F72.

The solution is to update to the same or very close firmware into both inverters. This is only possible if you have the exact same models. You can't mix different power ratings, on-grid and off-grid, MPPT and PWM, VM and MKS, twin versus non-twin, or 64 V and 58.4 V.

What firmware versions are you running at present?

Hello guys

I have the same problem with my paralleled inverters from Easun, the error F72.

Inverter typ is Easun SM IV 5.6KW. Two inverters ok and third have error F72.

I tried to contact support that i want upgrade/downgrade firmware in third inverter. 

But they are not helping me, can you please tell me where i can find application and firmwares to fix this problem?

I can not find it anywhere  

20230420_112443.heic

I need this CPU versions. Please can anybody help and share with me firmware 74.01?

4 hours ago, Paracisko said:

Please can anybody help and share with me firmware 74.01?

Sorry, not in my collection. Though I don't tend to chase on-grid firmwares nearly as much.

As a point of interest, what is the firmware version of the one that doesn't want to parallel?

I'll point out that there are thee models that look very much the same, so is it possible that you have a fundamentally different model, like an off-grid model? I don't even know how to tell the on-grid (here called an InfiniSolar V IV) from the parallelable off-grid model that comes in the same metal case (here called an Axpert MKS IV). Perhaps the labels give a clue; usually on-grid models' labels have some mention of exporting to the grid.

Well I upgraded firmware but it did not helped. 

Anyone new to the problem?

Guys i just find out where is the problem with Fault 72. Unfortunately, I don't know why, but replacing the control unit will solve this problem. Elsewhere on the forum, I read that the parallel card can also be defective - I have it all right after all. As part of the claim, I received a new control unit from the dealer and the problem disappeared. All the theories about wire lengths and such can have an effect, but if you are sure of the wiring and still have this problem, it needs a new unit. Hopefully I can help someone. The new version of the unit has a 1mF/5.5V capacitor. I'll send a photo.

4 hours ago, Paracisko said:

The new version of the unit has a 1mF/5.5V capacitor.

That looks more like a 1 F (one farad) capacitor to me. 1 mF is 1000 μF; that would be much smaller, at least in ordinary electrolytic form.

Yes sorry, it is 1F.