VinceG

Hi @VinceG
I’m no expert, just willing to poke my nose around. Looks like you are too… 😊 So - take this from whence it comes!
I presume P-Load is clear to you - power out from the inverter to the essential load, entirely under the inverter’s control.
I find P-L1 and P-External-CT-Total very useful.
P-External-CT-Total Reports power through the CT, so import (+) from, and export (-) to, the grid.
P-L1 seems to report power passing through the inverter’s GRID port. This is essentially the gateway between the inverter and the non-essential load. Positive is power into the inverter (import from non-ess), and negative is power out (export to non-ess).
So when these two show a similar positive value, that’s AC from the grid right into your inverter. When they differ, the difference is what is being consumed by non-essential load circuits. A negative P-L1 means your inverter Is actually sending power out to the non-essential load.
Long story, but I think there’s two answer your question.
Oh - about inverter Max load at 5.5 kw. I think P-inv is your friend for  that one. I’m not sure how to measure pass-through… that would be handy to know.
 

yup then everything is as it should be

Ok awesome here is LiBMS data

 

If you select the LiBMS menu on the inverter what do you see? 
No harm in reducing those values - i have mine at 120A and i have 3 batteries so the system could in theory work at 150A

100A Charge and Discharge is fine since you have 200+ ah. That's only 0.5C

That's about 92% efficiency, seems correct in the ball park.

Great information thank you 

check-out the more detailed explanations here >> 
 

No, there should be a max Isc rating, which you should not exceed, for the 5kW SunSynk, it is 17A.