This one is not mine and I haven’t opened it… Yet. 
Name it whatever you want, it still is a “measuring current” process… 
Probably measuring voltage drop over a properly calibrated low resistance. Just like the shunts.
As per the battery and its SOC, you can see that it’s charged to 3.51V per cell (56.2V), it’s sitting there about 2 hours to be properly balanced at a deltaV of less than 20mV and then, during discharge, all voltages and SOCs are properly synced.
In other words, the Shinwa BMS used is properly calibrated. So 30% SOC voltage is spot on.
The load is pure resistive and constant.
I will make time to reach the objective and properly measure the current with a proper DC clamp.
Comparing with Multi RS, this MP2 3K is all over the place when measuring current.
Look below when charging how looks the range of regulation. And it’s not in the most worse area…
It’s set for 14A charging and it is “regulated”, if you can name it that way, between 12A and 16A.
