Looks like they have a 500 amp versions too.
http://www.ebay.com/itm/DC-120V-500A-Volt-Amp-Combo-Meter-Battery-Charge-Discharge-Indicator-Camper-CAR-/170901504188?pt=LH_DefaultDomain_0&hash=item27ca8600bcI wonder what the shunt looks like and whether is is 75mV OR 50mV
Accuracy Volt ± 1% + 2byte / Amp ± 2% + 5byte
Resolution 0.01V, 1A, 0.01W, 0.01Ah, 0.01H
Resolution to 1 amp, but 0.01 Watts?
Typo perhaps
My chingrish translator smells something funny.
Wait a minute, this can't be the product Mex is either praising or denigrating, or perhaps he is denigrating the readers here. One can never tell.
My link is 36$ something with no free shipping.
Can't be any good