Solar power amp meter “fluttering”

[krissteyn]

Help please...
Problem : the amp meter starts off calm in the morning and then later starts to quiver from about 2 amps , up till 6 amps. It tends to drop back to 2 and the straight back up to about 5 , all the while quivering/fluttering.
Scenario :-
Medium size single solar panel ( new to the boat - still not sure wattage ) connected to a Steca Solaris sigma N368 solar charge controller.
I have a master volt MICC that shows batteries are being charged.
The Aero6gen windcharger is operational and charges indicate from zero to about 5amps in current wind. I am not seeing any correlation between the wind charger lows and highs and the variations of the solar charge.
Current battery level is 80% , highest I have seen is 86% recently...
..
I am assuming I have a bad connection somewhere - but so far have not seen any evidence - alternatively , I have a failing solar charge controller ?
..
All advice gratefully received...

[mickt243]

I’d suspect it’s a PWM controller, and working properly.

[sailormed]

I agree the quivering, fluttering must be a controller issue.

[WSMFP]

Are there MC4 connectors in line anywhere? I had a similar issue and the MC4 connectors had some corrosion in them.

https://en.wikipedia.org/wiki/MC4_connector

[thomm225]

First, grab the wires on the solar controller and move them around while it's fluttering and see if it stops.

This fixes about half my solar problems.

Afterward. Reconnect/reseat all wires or at least the wires you suspect had the bad connection.

[krissteyn]

Okay - thanks for all the advice ...
In the process of checking all the connections I came across a push button contact switch , connected to the amp meter (old analog style) which appears to have no effect when pressed. This boat used to have two panels , when I got her , only 1.
All the connections appear clean and properly connected.
Single length of twin cable from the panel connecting box (clean) to the controller - looks good. Quite difficult to get to - so just wiggled the wires.
My gut feel is the batteries are being saturated , ie. full , and due to age of batteries , cannot be charged more. It reached 83% today and then charging l3vel on the ammeter dropped to 2 amps...
The batteries are about 5 years old and probably due for replacement. But I am reluctant to fiddle with them now - Grenada isn’t cheap and add to that Corona...
I’ve never had a fancy controller and master volt display before... so am learning ��
My previous boats have been barebones simple.