My meters are cheap FleaBay specials. I am not sure about melting shunts, if you are using say a 30 amp shunt in a circuit that carries up to 200 amps, not only would the shunt possibly melt the meter reading would be WAY off too.
The meter shown measures 200 amps in or out of the battery. If I start the engine off the house bank I can see the starter drawing about 120-125 amps.
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