Hi I have a DROK® Voltmeter Ammeter Volt Amp Multimeter DC 4.5-30V 100A Voltage Currenr Monitor Ampere Testing Gauge V/A Panel Meter Red/Blue Dual LED with Current Shunt. Wondering if I can use it to measure charging amps with the shunt on the positive side rather than the negative side. It will be used to measure charing amps from my solar panel