Hi all
Its been a long time since I posted here.
When I do my testing I add 100 A shunts before and after the CC. This supplements the info from the battery monitor shunt.
I usually also collect air temperature data. So all told I am collecting 7 channels.
If your Raspberry Pi can do multiple channels you only need to buy a couple 100 amp shunts at about $25 each.
I use a Graphtec GL220 as my data collector, your Raspberry pi is a lot less expensive and ultimately more flexible.
I hadn't used by data collector for a few months but it is getting a workout now as I test my new LFP batteries.
Gale