Hall effect amp-hour counter

Get ready to spend $2,000+ US Dollars, the inductive shunt MUST be sized correctly for the wire, it is not CLAMP on, rather pass through, 50mv. it uses 10-times the Milli amps than a shunt type amp hour meter uses and it is around 90 times more inaccurate than a proper MANGANIN shunt at levels of around 800 Milli-amps or less. A lot of the power of a clamp type meter powers the circuit that senses the magnetic flux and translates it to an analog signal.