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mrkev avatar image
mrkev asked

Error2 BlueSolar

I'm running 6x Pylontech US5000 in parallel, linked via the CANbus to a CerboGX. Charging this I have 8 BlueSolar MPPT 150/35.


My MPPT are a mix of hardware rev2 and rev 3, rev 2 are running FW 1.61 and rev3 are running rev 1.59. Cerbo GX is F/W 2.91

The problem I have is that the FW1.61 MPPT units report battery overvoltage as soon as any charging starts - even if I replace the solar panels with a bench PSUand gradually increase the PV voltage. The only way to recover seems to be to disconnect VE.direct, PV and battery connections and restart it.


I can't seem to find a way to regress the F/W to 1.59, so I'm not sure what to check next Any ideas!


Thanks
Kevin

MPPT SmartSolar
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Alexandra avatar image Alexandra ♦ commented ·
Are they all programmed the same?


Or have the blue solar just been programmed with the rotary switches?
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mrkev avatar image mrkev Alexandra ♦ commented ·
They are all connected to the Cerbo GX, so the rotary switch does not affect the operation....

If I could get a copy of V1.59o for rev 2 hardware I would reprogram so all running same firmware, but naturally I am reluctant to update the working rev 3/V1.59 to v1.61 in case I end up making them stop working!

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Alexandra avatar image Alexandra ♦ mrkev commented ·

It is necessary if comms are not ok which can happen on can bus dropped packets etc.

Program individually, keep the system with the GX as controller and see if that makes a difference.

When i say program i mean confirm the system battery voltage on the mppt. And set the absorption float and battery type.

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mrkev avatar image mrkev Alexandra ♦ commented ·

Not working:

1690891580963.png1690891607970.png



Working:

1690891643952.png

1690891659127.png

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1690891580963.png (26.5 KiB)
1690891607970.png (18.1 KiB)
1690891643952.png (26.2 KiB)
1690891659127.png (18.5 KiB)
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2 Answers
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janlerouxrsa answered ·

My MPPT 150/45 rev 3 firmware 1.61 is giving the same error.

https://community.victronenergy.com/questions/222867/blue-solar-mppt-15045-error-battery-high-voltage.html

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mrkev avatar image
mrkev answered ·

Ah interesting - I did suspect the F/W... the release note say the voltage detect algorithm changed!

In my case the MPPT is programmed to know it's got 48V batteries too.

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