Help help help, Fitting Victron controller

[TrevandJenny]

I have now purchased a Victron mppt 75-15 smart solar controller as advised on this forum together with suitable cable fuses ect.
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I unscrewed the Sargent 328 from the wall, removed the solar panel cable from the 328. I then looked at the Sargent display panel, scrolled through the menus and noticed that the panel was showing 2.2 amps input.
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As I don’t want to cause damage I plugged the solar cable back into the 328.
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I cannot understand why the panel was showing 2.2 amp with the cable to solar panel removed from the 328.
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From the advice I have had on here, correct me if I am wrong
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Fit Victron in place, install fused battery to controller cable to Victron, install solar to controller cable to Victron.
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Is it safe to fit the upgraded Victron even though the Sargent visual screen is showing 2.2 amp, Help please. Thanks.
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[TrevandJenny]

I have now recalibrated the panel as suggested by Sargent, all is fine with solar cable removed the panel reads 0amps

 

[QFour]

So they are churning out MHs that show you are getting 2.2A more from your solar than you actually are. I suppose as components wear the resistance of some parts changes and so does their displayed voltage.