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F3600 MPPT

Posted: Mon Nov 10, 2025 1:55 pm
by HeinzG
Hi
Recently i observed some strange behavier:
The F3600s output is permanently altering between very low (~20W) and high (1.2kW).
My setting: String 1 (4 * 415W) north of the Building, now most of the time full shadow.
String 2 (5 * 415W) south of the Building mostly full sun.
String 1 disconnected: Pout 1.2kW.
String 1 connected: look above.
My question: How independent are those MPPTs?
Is there a Firmware-Update adressing this problem? (Version now:1.51/1.05/2.31)
Thanks for your interest!

Re: F3600 MPPT

Posted: Mon Nov 10, 2025 4:29 pm
by Will
Can you post some graphs or screenshots of the problem to help understand the issue?
Are you using optimisers in your strings? if so could one be faulty?

Re: F3600 MPPT

Posted: Mon Nov 10, 2025 9:47 pm
by HeinzG
Hi and thanks for your answer!
I admit using Optimizers in String 1, but i cant understand how those bring down String 2, as the Tracker are announced "independent".