Output Ripple

Questions
#1

Hi All,

I’ve been wondering about the output ripple that you see in my graph (ignore the obvious big dips by clouds)

I have 2 arrays on a 5kw Fronius Primo. Anyone know the cause of this? Most people I see have a smooth output.

Cheers…

Solar%20Ripple
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#2

I could be wrong but maybe it is a result of 2 arrays to 1 inverter with each array sending individual instantaneous peak powers contributing to the ripples. I have 2 arrays but each going to their own inverters and the outputs are summed.
https://www.pvoutput.org/intraday.jsp?id=28753&sid=26352&dt=20190514

#3

Roger, are you using the logdata push?

#4

Do you see the same ripples in the Fronius Solarweb.com history chart?
(I have two arrays into a 6kW Primo).

#5

@bulletmark yes I’m using the logdata push

#6

@willisave, the ripples are there, a but smoother though.

#7

@gregvet yes I was wondering about this too. Maybe it’s the result of 2 arrays in different directions. I’m sort of guessing this is normal, and nothing is wrong.

#8

I have explained the cause of this ripple previously, e.g. How to remove waves when Fronius Inverter is clipping?. See https://forums.whirlpool.net.au/thread/2634198?p=22#r428

In short, it is a problem in the logdata processing by PVOutput which can only be fixed by BB.

#9

@bulletmark, Sorry Mark, not exactly sure what you mean by “fixed by BB” what is BB?

#10

I mean it is a problem on the PVOutput side so it can only be fixed by the site’s maintainer, @bankstownbloke.