question

Chris avatar image
Chris asked

Pylontech stacks in parallel installed with LV-Hub incorrectly reporting charge / discharge current & limit

System - Single phase - 2x 5kw Multis in parallel.
2x stacks of 5 Pylon US2000 in parallel with LV-Hub
Cerbo GX
It would appear that the LV-Hub doesnt correctly report the correct available charge / discharge current to the GX.

The GX is showing 125A. (which follows the 5x25A mentioned in this doc:
victron_pylontech_up2500_us2000_us3000_us2000c_us3000c_up5000_phantom-s_force-l1_l2.pdf)

It should report 250A ?

The LV-Hub, also does not correctly report the operating charge / discharge current the the batteries into the system. (Noticed this as we also have a BMV in the system)

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Pylontechoffgridmultiplus ve.busmultiplus in parallelpylontech lv hub
1631613325264.png (42.4 KiB)
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4 Answers
Jack Peters avatar image
Jack Peters answered ·

Yes, only one stack is communicating with the gx device.

Double check the comms wiring to the LV Hub and ensure that the GX device and LV Hub are on the latest firmware.

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Chris avatar image
Chris answered ·

Firmware man.... bane of my life.....!! Especially Victron firmwares !!

GX is on the latest yes. As is everythgin else, as of yesterday,.

Dont know how you check the LV-Hub ?


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Chris avatar image
Chris answered ·

ok

Just discovered that the LV-Hub is missing one of the stacks - (only the '1' green LED lit) - so that answers that,.,.....

How best to reset so it hopefully "find" stack 2?

Power cycle by the on . off switch or Press the reset button on the LV-Hub ?

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Chris avatar image
Chris answered ·

Power cycles LV-Hub
Would appear to be seeing both battery stacks now

Still only reporting 125A Charge / Discharge current for 10x US2000 modules though

(on the plus side, it does seem to be modulating charge current based on the SOC now... still not convinced its reporting the live operating current it is seing correctly though)

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