Renogy RBM500 battery monitor setup?

[Outsider]

I've been using a little factory installed and DIY solar setup on my 2020 GeoPro 19FD for 18 months now and have just installed my first add-on Renogy RBM500 battery monitor and shunt system. About 50% of our camping is 3-5 day boon-docking outings. Everything is running fine but I'm not 100% sure of a couple of the settings on the battery monitor. The instructions are pretty minimalistic and I could use a review of my chosen settings. (I will include an attachment with 3 pages from the install manual that shows the settings description/instructions.)


For the record, I am running the following:


Factory installed:

1-100W flexible solar panel on the roof
1-30W GoPower PWM charge/controller


Feeding 2-6V Duracell GC2 (series connected) 215Ahr batteries



DIY installed:
1-210W portable rigid solar panel (used as needed)
1-Renogy Adventurer 30W PWM charge/controller


Both systems above feed the same two batteries above (multiple solar dealer techs said this would work fine).


My current chosen settings are:
Capacity: 215 Ahr
Full V: 12.7 or 13.2 VDC
Zero V: 12.0 VDC
PowOff: 11.9 VDC
Alarm: 110 Ahr
Attenuation %: ?



I am particularly baffled by the Attenuation field. (Let me know if you cannot get to or read the attached manual pages and I'll copy and paste them into the nest post.


Thanks for your help.


Outsider

[TacomaJoe]

The way I read it. You set your capacity at 215Ah and with each cycle the capacity setting will be reduced by the attenuation setting. My self, I would set it for ZERO and in the future I would watch how much I am getting out before I hit the low point and adjust the capacity manually to reflect the new value.