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jakudo avatar image
jakudo asked

MPPT loosing power for second and then go back to normal

Hi,

I've just noticed that last few days/weeks, the mppt behave strangely. In previous months, when the day was sunny, the PV Yield graph shows almost consistent line. However, last few days/weeks, it looses power for a second and then goes back to normal. For example today was very sunny day, with no clouds at all, and sometimes when I checked the VRM app, I saw that the power dropped for a second or two. Any idea what might cause that?


Thanks,

Jakub


P.S.: sorry, cannot add pictures, not sure why...

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1 Answer
ldoes (Victron Energy) avatar image
ldoes (Victron Energy) answered ·

Hi @jakudo, sounds like a voltage sweep to find the global maximum power point. This is normal behaviour.

For reference:
https://community.victronenergy.com/questions/234498/mppt-250100-problems.html
https://community.victronenergy.com/questions/87842/my-charging-graph-has-a-lot-of-spikes-is-this-norm.html

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jakudo avatar image jakudo commented ·

I saw the first thread you posted. However, I'm not sure, I have the same problem. I had the very same behaviour as in the first thread you posted before. Here is the link to my screens shots. 2 of them are ok, one is not ok. Dropbox folder - sorry, I don't know why I can't post pictures.


The "Not ok" picture was during sunny day without any cloud.

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