If I can ask a stupid question, I am going to add a second battery in parallel, how do I add a shunt for each battery, and how will it know which battery it is seeing if both are connected?
#21
Posted 19 August 2019 - 04:03 PM
#22
Posted 19 August 2019 - 04:36 PM
2016 Duramax 2.8 Diesel long bed Colorado 4WD with 2011 Eagle
#23
Posted 19 August 2019 - 05:04 PM
So I know the charge on each battery individually
#24
Posted 19 August 2019 - 05:53 PM
2016 Duramax 2.8 Diesel long bed Colorado 4WD with 2011 Eagle
#25
Posted 19 August 2019 - 07:15 PM
Thats the problem, cannot get a real sense of each battery, idealy they should be the same, but if not how would I know?
#26
Posted 19 August 2019 - 08:21 PM
2016 Duramax 2.8 Diesel long bed Colorado 4WD with 2011 Eagle
#27
Posted 19 August 2019 - 09:06 PM
This is a great question. The BMV has an option for "mid point" voltage testing, but that only works for series connections.
As Buckland suggests, the two batteries should be identical in makup/brand/age. To use the shunt as intended, I would suggest using a buss connection for both batteries to ground to, and from there go to the shunt. You will NOT be able to see individual SOC for each though
2012 ATC Puma Shell build - https://www.wanderth...012-puma-build/
Power considerations thread - https://www.wanderth...e-power-scotty/
Building out an electrical system - So, you want to setup a good electrical system in your camper? - Electrical, Charging, Solar, Batteries and Generators - Wander the West
#28
Posted 19 August 2019 - 09:40 PM
For a short time, it bothered me that this info was unavailable, but the cost of obtaining it is well past the point of diminishing returns, IMHO.
If it is a concern, attach the positive lead from solar & load on one battery, and place the negative lead from the shunt on the other battery, swallow hard & enjoy your camping. Life keeps getting shorter.
Paul
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