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heinz0005 avatar image

Can't connect a BlueSolar Charger MPPT 100/50 to cerbo

Can't see the BlueSolar Charger Mppt 100/50 Ser.Nr. HQ153FGM1l Firmware v.150 on my Cerbo GX Firmware v2.54 the MPPT ist connected to the VE.Direct.

A BMV-700 connected to VE.Direct works fine.

The only difference that I found : BMV 700 gives 3.5V on the VE.Direct connector and the MPPT has 5V on the + connector. so also the data lines on the MPPT has an higher level than on BMV-700.

cerbo gx
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6 Answers
heinz0005 avatar image
heinz0005 answered ·

After I connected an original Victron cable all works fine.

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wkirby answered ·

This is peculiar. This should simply work. We know the MPPT interface is working.
What happens if you take the cable out the back of the BMV (which we know is working), and plug it into the MPPT?
Are they Victron VE.Direct cables or did you make them yourself?

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heinz0005 avatar image
heinz0005 answered ·

Thank all for your hints, but is still not seen on device list.

Have checked with Dongle, Tx port is on" Normal communication "

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wkirby answered ·

What is the setting of your "Tx port function"? This needs to be set as "Normal communication"
Use your Bluetooth dongle and Victron connect to check and set this.

The MPPT's work at 5V TTL serial and BMV's work at 3.3V TTL serial, all normal there. The Cerbo has a digital isolator at its VE.Direct inputs so level shifting inherently occurs here.

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heinz0005 answered ·

I have changed the cable twice and also reboot both, a Bluetooth dongle works fine on the MPPT.

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leverg answered ·

Change cables ? Might be a cable fault ? Mine works with 2.54 and same firmware on mppt. Maybe reboot the cerbo ?


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