Chrisbad

Just some feedback on this topic. Five months after upgrading to 71.82, I again experienced the high charge voltage issue. Have now upgraded to 71.92. Touch wood........

What is the delta between 71.82 and 71.92? Where can I download this firmware?

This is exactly what I've experienced - The inverter will, at random times, push charge voltages as high as 65V to the point where the BMS disconnect the batteries and resets the system. I have now upgraded to 71.82 and I really hope this issue is now something of the past.

Thanks Jaco! This is good news. I have 2 SOL-I-AX-5NB inverters in parallel and will be upgrading to 71.82 soon then. Regards Chris

@Jaco P Bloem, did your SW upgrade solve the over voltage issue?

Hi, I'm Chris. Great forum. I hope to learn from others and maybe also contribute at bit. Has recently (like 3 weeks ago) joined the solar revolution. I have the Mecer 5kW-48V MKS II inverter, 16 x 275W panels split in two banks, with 12 x 200Ah TFA batteries. The system has performed flawlessly since installation. I have one issue though, I am unable to collect any data from the unit via USB. It keeps connecting/disconnecting. I have browsed this forum and it seems to be a common issue. I could however not find a solution yet. Anybody out there having some solutions or could perhaps point me to a thread where this has been resolved?