# Multiplus II GX with Pylontech US5000 connection problem **URL:** \ **Category:** Q&A and troubleshooting\ **Tags:** multiplus-ii, rj45\_cable, domestic, pylontech, beginner\ **Created:** [25 December 2024 13:10 UTC](https://community.victronenergy.com/t/multiplus-ii-gx-with-pylontech-us5000-connection-problem/16514 "2024-12-25T13:10:27Z")\ **Posts on this page:** 12\ **Page:** 1
**Author:** ![volocornee](https://avatars.discourse-cdn.com/v4/letter/v/d07c76/32.png) [@volocornee](https://community.victronenergy.com/u/volocornee)\ **Post date:** [25 December 2024 13:10 UTC](https://community.victronenergy.com/t/multiplus-ii-gx-with-pylontech-us5000-connection-problem/16514/1 "2024-12-25T13:10:27Z")
Hi, I’m setting up my first system with: - Victron Multiplus II 5000 GX - 2 US5000 Pylontech batteries I’m using a Victron VE.CAN to BMS CAN cable (type A) to connect them. As recommended in the manual, I’ve changed the VE.CAN port profile to CAN-bus BMS (500 kbit/s). However, the system isn’t recognizing the batteries as connected device. I tried using a tester to check if the cable is working properly, but no LED lights came on. Could this indicate a defective cable? Thanks in advance. ![image](https://europe1.discourse-cdn.com/victron/original/2X/c/c9ee41bc7d080a6adc361081b6eb841616b30505.jpeg) ![image](https://europe1.discourse-cdn.com/victron/original/2X/d/d90a2dd1f658cfa88e7fea590ca53e00bf443143.jpeg) ![image](https://europe1.discourse-cdn.com/victron/original/2X/f/f61988841d89efdd1e80841fa5959210a52634d1.jpeg) ---
**Author:** ![DuivertNL](https://dub1.discourse-cdn.com/victron/user_avatar/community.victronenergy.com/duivertnl/32/279_2.png) [@DuivertNL](https://community.victronenergy.com/u/DuivertNL)\ **Post date:** [25 December 2024 13:36 UTC](https://community.victronenergy.com/t/multiplus-ii-gx-with-pylontech-us5000-connection-problem/16514/2 "2024-12-25T13:36:55Z")
If your tester is ok, and nothing lights then yes looks like a defective cable… ---
**Author:** ![Netrange](https://avatars.discourse-cdn.com/v4/letter/n/7ab992/32.png) [@Netrange](https://community.victronenergy.com/u/Netrange)\ **Post date:** [25 December 2024 15:10 UTC](https://community.victronenergy.com/t/multiplus-ii-gx-with-pylontech-us5000-connection-problem/16514/3 "2024-12-25T15:10:44Z")
Or the Battery of the Tester is empty … 😉 Tryed with a normal RJ45 Cable ? ---
**Author:** ![volocornee](https://avatars.discourse-cdn.com/v4/letter/v/d07c76/32.png) [@volocornee](https://community.victronenergy.com/u/volocornee)\ **Post date:** [25 December 2024 16:56 UTC](https://community.victronenergy.com/t/multiplus-ii-gx-with-pylontech-us5000-connection-problem/16514/4 "2024-12-25T16:56:27Z")
😀 Sure, I’ve tested it with regular LAN cable. It works properly Going to refund cable then ---
**Author:** ![Netrange](https://avatars.discourse-cdn.com/v4/letter/n/7ab992/32.png) [@Netrange](https://community.victronenergy.com/u/Netrange)\ **Post date:** [25 December 2024 17:04 UTC](https://community.victronenergy.com/t/multiplus-ii-gx-with-pylontech-us5000-connection-problem/16514/5 "2024-12-25T17:04:42Z")
or you can quickly build your own to test … ![grafik](https://europe1.discourse-cdn.com/victron/original/2X/6/6a9d8ffe4943f5e43c2bdb5dcc4691dc3301eab6.png) ---
**Author:** ![volocornee](https://avatars.discourse-cdn.com/v4/letter/v/d07c76/32.png) [@volocornee](https://community.victronenergy.com/u/volocornee)\ **Post date:** [9 January 2025 10:40 UTC](https://community.victronenergy.com/t/multiplus-ii-gx-with-pylontech-us5000-connection-problem/16514/6 "2025-01-09T10:40:54Z")
The cable turned out to be fine; the issue was with my cheap tester, which doesn’t work with this specific pin configuration. The real problem, however, was selecting VE.Can & CAN-bus BMS (250 kbps) instead of CAN-bus BMS LV (500 kbps). Switching to the BMS LV option resolved the issue. ![image](https://europe1.discourse-cdn.com/victron/original/2X/b/b87b622b5f16b50163f52d0a2c90c5144de2f5f9.png) ---
**Author:** ![DuivertNL](https://dub1.discourse-cdn.com/victron/user_avatar/community.victronenergy.com/duivertnl/32/279_2.png) [@DuivertNL](https://community.victronenergy.com/u/DuivertNL)\ **Post date:** [9 January 2025 12:29 UTC](https://community.victronenergy.com/t/multiplus-ii-gx-with-pylontech-us5000-connection-problem/16514/7 "2025-01-09T12:29:18Z")
I tought you already set it up like that in your first post? ---
**Author:** ![Netrange](https://avatars.discourse-cdn.com/v4/letter/n/7ab992/32.png) [@Netrange](https://community.victronenergy.com/u/Netrange)\ **Post date:** [9 January 2025 13:33 UTC](https://community.victronenergy.com/t/multiplus-ii-gx-with-pylontech-us5000-connection-problem/16514/8 "2025-01-09T13:33:01Z")
I had actually expected this to be the first troubleshooting step. Perhaps the cable was one without a shield … then the simple measuring devices lack the reference wire for measuring … ‘as is so often the case, the fault lies between the ears’ But it’s nice that it works 🙂 ---
**Author:** ![keeusje](https://avatars.discourse-cdn.com/v4/letter/k/ba9def/32.png) [@keeusje](https://community.victronenergy.com/u/keeusje)\ **Post date:** [10 January 2025 20:10 UTC](https://community.victronenergy.com/t/multiplus-ii-gx-with-pylontech-us5000-connection-problem/16514/9 "2025-01-10T20:10:21Z")
Hello! I have the same problem, that there is no connection between the multiplus and the batterys. Can you elaborate a bit more how to change these settings? That would be great! Thanks in advance!🙂 ---
**Author:** ![Netrange](https://avatars.discourse-cdn.com/v4/letter/n/7ab992/32.png) [@Netrange](https://community.victronenergy.com/u/Netrange)\ **Post date:** [10 January 2025 20:13 UTC](https://community.victronenergy.com/t/multiplus-ii-gx-with-pylontech-us5000-connection-problem/16514/10 "2025-01-10T20:13:01Z")
Direct connection between Pylontech and Multi Plus didnt work … This is a Multi with GX … Do you have a Multi Plus 2 with or without GX Device ? What else have you configured and connected in your System ? ---
**Author:** ![keeusje](https://avatars.discourse-cdn.com/v4/letter/k/ba9def/32.png) [@keeusje](https://community.victronenergy.com/u/keeusje)\ **Post date:** [10 January 2025 20:28 UTC](https://community.victronenergy.com/t/multiplus-ii-gx-with-pylontech-us5000-connection-problem/16514/11 "2025-01-10T20:28:03Z")
(I have the GX) i found the settings, and problem is also solved 😄 ---
**Author:** ![system](https://europe1.discourse-cdn.com/victron/original/1X/21a9a7b5db7c6339715f993568736a7053199995.png) [@system](https://community.victronenergy.com/u/system)\ **Post date:** [24 January 2025 20:28 UTC](https://community.victronenergy.com/t/multiplus-ii-gx-with-pylontech-us5000-connection-problem/16514/12 "2025-01-24T20:28:55Z")
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