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75/10 MPPT - Errors without showing errors

Hi All,

I'm trying to figure out if I've done something wrong?

I've got a 75/10 non Bluetooth MPPT connected to a Pi Zero 2 w and maybe earlier this week it will start charging and go to a good wattage what the 125w solar panel is getting and suddenly it will drop right off to a certain point it will turn off and state goes to Off. I've changed the panel and does the something the next day. I want to figure out if it's the battery, MPPT. I can confirm it's not the solar panel. HomeAssistant screeenshot shown below, Yesterday was pretty average in Perth WA, We had rain until like 11am and then it cleared up, however the MPPT didn't fire up unil like 1pm but today is different, it's a warm 24 degree sunny day in Perth today. It cranked up to 45w and then gone. It's doing something different, it's stuck on 7w.


Edit: I've got another solar panel setup in my back shed using the Bluetooth'd 75/15 and a 500w panel and that system is floorless and my house RS Multi 48/6000/100 is cranking at the moment doing around 3500w. All my systems are using GEL/AGM Battery setup. The weird system is using 12v 2x 40ah AUS CEL No.1 batteries, Shed is using 6x 26ah @ 24v and the house is using 28x 100ah @ 48v.


1717204152735.png

Thanks

MPPT Controllersbattery chargingSolar Panel
1717204152735.png (46.1 KiB)
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klim8skeptic avatar image klim8skeptic ♦ commented ·
@DanielSon89 post a plot with the pv voltage and pv current.

What battery voltage is the mppt charging?

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