question

petter avatar image

Low watt showed in VictronConnect

Hello,

Im trying to understand is something is wrong with my system or if everything is ok.

The measurements Solar W, V and A showed in Victronix Connect are very low, I'm expecting more.

Just between the MPP changes from Bulk to Absorption in a direct hit from sun shows


In Bulk mode

Solar

42W

34.7V

1.2A


Battery

14.3V

2.7A


In Absorbtion mode

Solar

36W

34.18V

1.1A


Battery

14.29V

2.3


My system setup is quite simple

Battery:

AGM 12 V, 260Ah


Regulator:

mppt 100/20


Panel:

Pmax 280W

Vmpp: 32.5V

Impp: 8.54A

Voc: 38.8V

Isc: 9.25A

TüV: 1500 V DC


Appreciate any feedback

Petter




smart solar set-up help
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1 Answer
wkirby avatar image
wkirby answered ·

That seems normal to me.
Once you have reached your set Absorb Voltage of (14.3V I presume), then charge power will start to decline. As the battery is getting full, the current must go down in order to maintain the target Absorb Voltage, otherwise the Voltage would just continue to rise,
If a load appears on the battery, then you should notice the power increase as the MPPT maintains the Absorb Voltage.

The power will decrease even further when you are in Float mode.

It's not possible to continue charging a battery at full power if it is full or getting full.

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Hi and thanks!

I’ve got a lot to learn:-)