Hello, I thinking about how to monitor power on a large drone using many battery packs. I plan to use CAN power monitors so there should be enough IO, but I am not sure ardupilot has the battery number of batteries I need available. I see on the battery monitors documentation page that up to 16 power monitors should be available with BAT# for the first 1-9 then letters following. I see in the full parameter list that parameters for BATA, BATB, etc. are documented but I am not able to view or edit these BAT_letter paramters beyond 9 in mission planner. Is there some other setting I need to change to enable more than 9 battery monitors?
AFAIK that feature is only available on ArduPilot 4.6.0 and above.
Thanks for your reply, any idea which version it might be available in? I loaded the V4.6.0-beta4 firmware and still do not see parameters for BATTA in the tree.
Then it is probably a 4.7.0 feature 
Oh well, I am looking forward to the new features then. Thanks for all your hard work
I have not seen that parameter set before so I tried a few things on a CubeOrange.
Loaded 4.7.0-dev. Parameters not found.
Created a parameter file with BATTA_MONITOR,8 and tried to load it. Error “missing 1 params”
Checked the Custom Build Server to see if there was something to enable it. Don’t find anything.
So, I don’t know how these parameters are used.
I have not seen that parameter set before so I tried a few things on a CubeOrange+.
Loaded 4.7.0-dev. Parameters not found.
Created a parameter file with BATTA_MONITOR,8 and tried to load it. Error “missing 1 params”
Checked the Custom Build Server to see if there was something to enable it. Don’t find anything.
So, I don’t know how these parameters are used.