It's a LOT harder to detect the current, as it usually requires breaking in to the thick lead to monitor the current. Although a better way is to amplify the voltage drop across the battery earth strapInstead of the large increase of current Nigel?
Through a current sensor which is connected to my ecu I can read the battery current and direction.What type of battery current access do you have?
The simulation looks very good but it will take some time for me to understand. Thank you for the circuit.any questions on my design?