Good morning, everyone.

I hope that you can help me. My installer and I are dumbstruck at the moment. Since installation of my solution, I seem to experience issues with the batteries disconnecting from the inverter. We have tried various settings without any luck.

Does anyone have working settings between this inverter and the battery?

Your assistance will be highly appreciated.

Is this with the cable between the inverter and the battery's BMS, and the battery type set to PyL?

Do you have more than one module installed? If they have different ages, it may take a while for the state of charge of the modules to equalise, and some may be disconnecting until it all evens out.

Thanks for the response. I do not have a BMS cable between the inverter and the battery and for now, I only have one battery and have just procured the second US3000C battery which should be delivered by Friday.

14 minutes ago, Tboss said:

I do not have a BMS cable between the inverter and the battery

Ok, so perhaps your voltage settings are too high. Here are the manufacturer's recommended settings, with corrections and brief explanations. Setting 26 might be what is causing the battery to disconnect.

Thank you, Sir. I will try these settings.

I managed to get the BMS cable connect to the inverter and the Pylontech battery. Is it normal to see the error 61 on the inverter after about 5 minutes of powering the battery? If so, how long does it take to clear?

6 hours ago, Tboss said:

Is it normal to see the error 61 on the inverter after about 5 minutes of powering the battery?

As it says in the manual (near the end, not with the other warning and fault codes), warning 61 means no communications. It takes 3 minutes for the warning to come up, presumably became some battery BMSs can be slow to talk. After 10 minutes, it will stop charging or discharging the battery.

So actually you haven't yet successfully connected the inverter and BMS. What cable are you using? 

I managed to make myself a cable with the following pinouts. This error is just persistent and doesn't disappear. As a result, the battery doesn't discharge and feed power into the house. This was evident last night when I changed from SUB to SBU and we totally lost power.

Inverter -----> Battery

3 ------------> 8
5 ------------> 7

Thanks
 

I would try a cable as per MPPSolar's recommendation, which uses BMS pins 1 and 2 instead of 7 and 8 (not necessarily respectively).

Youda posted it here: https://powerforum.co.za/topic/2322-youdas-off-grid-lab/page/2/?tab=comments#comment-55761

Edit: use the bottom part of the diagram, the one meant for Axpert Kings. They would have the same removable display as your Kodak OG-7.2, I believe, and therefore the same RS-485 connector pinout. Actually, they do use different firmware, so I suppose it's possible that the hardware is different. But where to find the right answer?

Edit 2: the US3000C are apparently different to US3000A and B; the above is not necessarily correct for US3000C (the latest battery version as of this post).

 

Edited April 14, 20215 yr by Coulomb