valisof

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Hello, I used a cable with RS485 for a while and now I use a CAN cable. I noticed that there is a difference in data reporting on the 2 types of communication. More precisely, on RS485 I have never seen the battery with 100% charge, it was at most 98% and recently even 97%. Since I changed the cable to CAN, now it shows me SOC of 100%. So I think that communication on CAN is much better. For CAN I use a network cable (one to one) and for inverter LI at 05 and L052 at 36. DIP at battery 1-ON and the rest OFF. I have an SPF5000ES and 2 pcs US3000C.

Hi FrederikSchack, Sorry for being late with an answer. There are 2 types of connections / protocols: one on CAN and the other on 485. The cable I made uses the 485 protocol and that's why I didn't connect the CAN pins anymore. I'm going to try to make a cable for CAN only. The cable is ok even now. I had no communication problems.

Hello, I just installed a Growatt SPF5000ES (build 040.05 / 041.05) together with US3000C. I had big problems communicating with BMS but, after many tests, I succeeded in the following option: 1. cable made according to the picture (thanks Neil27) 2. dipswitches 0 0 0 1 (I have the switch reversed - the first 3 switches are down and the last switch is up) 3. connected cable with battery side in US3000C - A / CAN port 4. connected cable with inverter side in SPF5000ES - BMS port 5. go to setting 05 and select Li with protocol L02. Make sure it is set, then press Escape and the communication should start after a few seconds. 6. To verify that it is communicating, got to setting 12, 13 & 21. These will now be displayed as percentages and no longer voltage. You will also see a Li display next to the battery on permanently. p.s. sorry my english ...