Batteries, like leaky gas tanks, loose a little power internally, where the meter can't measure it. These meters must be carefully set up to match your battery. The signal can be sent on small wires, so the meter may be located some distance from the shunt, often in the living quarters for more convenient checking. All current going in or out of the battery passes through the shunt and is counted. THE ONE Tri-Metric keeps a running total of power into or out of your battery and displays the present level of charge.
Small wires run from meter head to included shunt near the battery.
Net Amperes now flowing into or out of the battery. Flashing alarm for battery needs charging and for needs equalizing. Shows days elapsed since last full charge, amp hours cycled since last full charge, total amp hours cycled since battery was new, and lowest voltage and highest voltage since reset. 1 year warranty. Reads accurately 8 - 35 volts.