The Deye SUN-12K-SG05LP3-EU-SM2 with Batrium BMS, this is how it works for me

HowTo
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After several days of intensive research and many attempts, I managed to connect the Deye SG05LP3-EU-SM2 to the Batrium BMS, and both now work perfectly together. For those planning to use this combination, I have put together a short guide.

The cable

I took a standard network cable, cut off one of the connectors, crimped ferrules onto the two middle wires (blue and blue-white), cut the remaining wires so they couldn’t touch to prevent a short circuit, and then covered the whole thing with heat-shrink tubing to make it look nicer. I connected the blue wire to CAN bus high and the blue-white wire to CAN bus low. It works for me without any shielding.

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Inverter settings

Battery Setting

Page 1

Batt Mode onLithium

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Page 3

Lihium Mode on 14

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Settings at the Batrium

Menu/Hardware/Integration

CanBus onPylontech LV

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Menu/Hardware/Control Logic

Template High/ Limited (Original)

Charge Target Voltage Scaling set to 10, Current Scaling set to 10, and Power Scaling set to 1

Discharge Target Voltage Scaling set to 10, Current Scaling set to 10, and Power Scaling set to 1

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That’s how it should all go. :slight_smile:

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Cheers

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I can only encourage everybody to connect the GND pin, when creating own cables for a CAN bus. Theoretically a CAN bus should work just with high and low pins, but practically a potentially very different GND potential on both ends of the bus confuses the CAN bus controller chips, especially if those GND potentials are changing a lot.

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According to the instructions, the shielding should only be connected at one end.

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The current setup is a test; in the final assembly I will also install a shield.

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Hi Jens,

Thank you for this write up! Can we add it to our wiki for other users to benefit from?

I have noted this against your name in case you need support later on :slight_smile:

Thanks again,
James

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Hi James,

I’d be very happy if you could add my post to the wiki.
My current inverter software version is:
MAIN: Ver 2107-1170-1809

Best regards from Germany!

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