Bug Report? Multiplus or maybe Cerbo GX

Q&A and troubleshooting
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1

We have dual Multiplus 5000 / 230V in parallel on our boat. They are controlled by a Cerbo running V3.52.
When I have a small generator connected to our shore power, wattage, amperage and voltage of this connection are displayed on the Cerbo GX/GX touch. Unfortunately, the math indicates a very low power factor.

IMG_3659
IMG_36594032×3024 2.38 MB

As you can see from this image:
AC In
950 W
221 V
7.3 A

For the above to be correct, the power factor would have to be 0.60, which is incredibly inductive.

When the screen shot was taken, the Multipluses were turned on just to charge the house bank. There were probably a few vampire loads connected (chargers, microwave clock, etc) but nothing that should skew that inductive.
Is that power factory expected from the Multipluses themselves? Any other thoughts?

Mike

2

Since you are in parallel, i would check if there is good curent sharing (clamp on ac input on each inverter).
How does it compare to the current being deawn from the generator.
And then a DC current check as well.
If one is working harder than the other the weird reading will be from that.

The PF can be altered with various settings, one of them is weak ac which is usually enabled when generator is known to be used on site.

3

I have a similar situation running 2 Multiplus 3000 12v 2x120s. Watts are about 50% of the VxA numbers. I think it is a glitch in the reporting of the amps with these units running parallel. My EMS system shows 24-25A on L1 input, while the Cerbo GX/Multiplus is reporting 45A.