Quote Originally Posted by Cuppa View Post
No Steve, I have a NASA BM1 battery monitor which counts amps in & out & shows real time amps in & out. (Uses a shunt). I wish this sort of phone technology had been available when I installed my set up. It would have far easier & saved me a bit of grief. How does the app calculate SoC? Do you have to input the battery size when setting it up?
My Dual battery loads are connected via a Shunt to the BMV-702 so all loads in and out are measured. I am using a Lifepo4 battery which has around a 99%+ charge efficiency, so it's pretty accurate. The app simply recives the BMV data over bluetooth, so its not calculating anything, just displaying the data remotely. Yes, battery size needs to be input initially.