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stolenhour avatar image
stolenhour asked

MPPT Bluesolar 75/15 Not Charging

This weekend (Casco Bay, Maine) I finished the installation of my MPPT BlueSolar 75/15 and Xantrex 110W solar flex panel. I attached the bluetooth dongle so I could read everything via VictronConnect. I will include several screenshots below. It seems everything is reading correctly on the VictronConnect except that it will NOT charge... Battery voltage around 12.5V, panel voltage around 19-21V, used expert mode to enter my AGM values (also tried the preset values just to see if one would work - it did not). I am not sure what to do to enable the system to generate watts... Any ideas? Much appreciated, Peter.

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MPPT Controllers
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1 Answer
kevgermany avatar image
kevgermany answered ·

Check connections/fuses/switches between the MPPT and the battery.

If you have a meter, it would help if you check battery voltage and output voltage with it.

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stolenhour avatar image stolenhour commented ·
kevgermany you were correct - it was a blown fuse (15 amp inline fuse). Once I replaced the fuse all seems to be working fine. Thank you!
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nigely avatar image nigely stolenhour commented ·

Would suggest a higher rated fuse than 15amp probably as high ad 30 or 40amp .

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stolenhour avatar image stolenhour commented ·
Thanks for the reply. Where would you suggest I check the battery voltage and output? Would this be to check if the MPPT has a working connection to the battery? I did re-check the connection and it is good. That said, I did install an in-line fuse from the MPPT to battery and will check that to see if the fuse is faulty. I have a Victron SmartSense device on the battery which conveys to the battery voltage to VictronConnect.
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