ZTT Batteries

Good day friends. I bought Victron Quattro II 5000 cause in Ukraine now very big problems with electricity. This is very good item and I'm very happy with it. But I have some problem. My wife bought two Lithium batteries 100Ah per one 48v from ZTT LLC (zttcable.com). This is good factory and ZTT is the general partner of Ukrainian Electricity Systems - Ukrenergo and DTEK. When I connected batteries to my invertor, batteries are working, charging but from time to time goes down to alarm. I see that no connection between BMS-CAN of invertor and batteries. I call to tech support of ZTT and they helping me now to connect this everything. But they told that I need to buy RS485 to RJ45 Convertor. I also make an order for it but maybe somebody know is it really need this convertor or maybe I need to make normal cable? Or maybe somebody know how to connect Victron with third-party batteries. I also read manual about 3d-party batteries and no one article can't help me. Please help with some information cause this invertor help for me and my family to make heat in my house. Thank you

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klim8skeptic ♦ commented · Jan 30, 2023 at 10:29 AM

Not much info on the zttcable.com website.

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intrerio klim8skeptic ♦ commented · Jan 30, 2023 at 10:49 AM

Yes. I talking with manufacture every day and they sending me info what I need. But I can't understand what kind of info I need from them

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nickdb ♦♦ intrerio commented · Jan 30, 2023 at 10:55 AM

Victron works with CAN communication based on, iirc, NMEA 2000 messaging standards.

There is some public (unofficial) information available for this with a bit of searching, but they may be able to request access to the official standard via Victron distribution, which would enable to them to create a suitable comms profile that works with the victron ecosystem. Ultimately it is up to them to test this all works.

Alternatively, you could install a shunt and operate the system via more traditional voltage/current control, based on the battery specs.

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