May 15, 20224 yr Hello everyone, I'm having a 3 phase system with Growatt SPF5000es and I just bought 4th inverter to parallel it to phase 1, to have 10kw power in this phase. But..it seems the parallel board of my new inverter is different. This is my wiring: I'm using CAN communication with CAN/RS485 hub between the inverters and my Pylontech US3000C batteries. Unfortunately when I plugged the 4th inverter (and after wiring it all by the manual), I got the Error 20 (BMS communication fail). I digged inside the manual of the old iverters and my new one - and I've found that ihe new BMS board does not need a hub, but only connection between the main inverter and the main battery. So this wiring I guess is not possible to me, because my old 3 inverters are having the old parallel board. Has anyone had and solved this problem? My old 3 inverters never managed to communication by RS485, but it worked by CAN..until now that I add this 4th new inverter. I hope for you help. Thanks
May 20, 20224 yr Evening Deyan, We are currently installing a 10kW system compiled of 2 x SPF5000ES and 2 x UP5000. Growatt's new batch of ES's are causing quite a lot of trouble... We had the same issue when we purchased a new ES from the old production line and one from the new line - unknowingly. We have not come right in enabling them to communicate correctly between each other as well as through BMS. Through much research it is advised to replace the comms board in the new inverter in order to allow for comms between your 4. Hope you come right!
March 30, 20233 yr hello What RS485/CAN HUB use ? I found nothing in the e-shop for buy this HW Or now you known from how version comms board not need RS485/CAN HUB ? I starting building 3phase system with baterii box a dont know how it connect together Thanks [email protected]
July 29, 20233 yr You can build your own by simply connecting 4 Keystone Jacks in parallel. In fact you only need to connect 3 pins (1,3 and 5 if I remember correctly) I have the exact same setup of 4 SPF5000 and 6 UP3000 and they work like a charm! Edited July 29, 20233 yr by Berni
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