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numer0-6 avatar image
numer0-6 asked

Absorption and float LEDs flashing simultaneously on MPPT150/70, batterie not charging

Hi,

I'm setting up a SmartSolar MPPT150/100 to charge batteries with solar panels. Here is my configuration :

-2 arrays of 3 solar panels each (Voltec 385W, Voc = 43.3V each panel)
-2 packs of 12V batteries in series (so 2x 24V batteries)

I've got the Absorption and Float LEDs flashing simulatenously, and the batteries are not charging. I checked the manual and it indicates "Charger or panel over-voltage". I measured the voltage coming from the solar panels and it never exceeded 115V (which is less than the maximum PV voltage).

What could be the cause of this error ?

Thanks in advance.

MPPT ControllersSolar Panelsmart solar set-up help
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2 Answers
Alexandra avatar image
Alexandra answered ·

@Numer0_6

It is a Smart Solar so connect to it with Bluetooth and use victron connect.

It will tell you what is going on directly no codes.

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numer0-6 avatar image numer0-6 commented ·

Hi alexandra,

We did what you suggested and noticed the the MPPT was configured to feed 12V batteries, where it's been hooked to 24V packs. Reading the manual, I understood it was supposed to be auto-detected, but apparently it wasn't. Switching it to 24V apparently solved the problem !

Thanks for the answer, hope this can help others ;-)

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marekp avatar image marekp numer0-6 commented ·
@Numer0_6

Auto-detect works only with the first installation.

If MPPT was already connected before to 12V battery it will stay at that setup.

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numer0-6 avatar image numer0-6 marekp commented ·
Would be nice if that was clearly stated in the manual, but I couldn't find it ;-) Anyway, problem solved thank to all !
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marekp avatar image marekp numer0-6 commented ·

@Numer0_6

It is kind of logical.

You do not want to set up your MPPT from the beginning every time battery is disconnected. :)

I agree, it should be mentioned in the manual.

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Stefanie (Victron Energy Staff) avatar image Stefanie (Victron Energy Staff) ♦♦ numer0-6 commented ·

https://www.victronenergy.com/media/pg/Manual_SmartSolar_MPPT_150-70_up_to_250-100_VE.Can/en/features.html#UUID-e959e637-38e7-fc71-a56a-7a870434d9a6

If this is not clear enough, please let us know.

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numer0-6 answered ·

Connecting in bluetooth and switching from 12V to 24V batteries configuration solved the problem. It is not auto-detecting and needs to be set using the victron app.

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MPPT Product Page

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MPPT 150/60 up to 250/70 Manual