question

gawan avatar image
gawan asked

Regular Power Drop (every 10 min) down to 70% ?

Hi,

my system consists of 3 x Multiplus II 3000, two MPPT250/100 (16x330 Panels each) and one MPPT250/60 (8x330 Panels).

I have regular power drops from 100% to approx. 70% (no matter how much AC or DC is produced).


These power drops occure on a very regular base - every 10 minutes and they occure on all three MPPTs in the exactly same time horizon.

I have NO idea why and what I can do to fix it.

Does anyone have any idea ?

BR

Gawan

MPPT Controllers
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2 Answers
solarlion avatar image
solarlion answered ·

Same - view attached Image. Have you ever found out why?

I have 10 Modules connected. 2 Parallel strings with each 5 Modules in series. Maybe this 10 minute interval is the mppt searching for which maximum is the better one, because of the parallel connection of strings?
mppt-10-min.png


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kevgermany avatar image
kevgermany answered ·

It's the mppt adjusting for possible light changes.

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