Description:
The 50mV/500A Shunt can be used with several popular Amp-Hour Meters, such as Xantrex Link 10 or TM-500A, or Trimetric 2020, the Pentametric Battery Monitor or the new outback Power FLEXnet DC.

How a shunt works:
A shunt is necessary in order to measure amps and amp-hours with these Amp-Hour Meters. A shunt is an accurate, very low resistance resistor which is placed "in line" with the wire carrying the current to be measured. This can the battery cables to the Inverter or the PV IN or PV Out of a Charge Controller. When current flows through the shunt, a small voltage is developed across the shunt which is proportional to the current flow. The Amp-Hour Meter battery monitor accurately measures this very low voltage and converts it to the "amps" reading on the meter. The resistance, which is the ratio between the voltage across the shunt and the current flowing through it, is a constant for any particular shunt--and is one of its important parameters. For most substances, resistance is usually described in "ohms", however for some reason shunts are described by the voltage drop that occurs with a certain current: for example: "50 millivolts at 500 amperes." However the meter only cares about the ratio-which is the resistance--so a 500Amp/50 millivolt shunt is equivalent, to a 250Amp/25 millivolt shunt. They both have a resistance of 0.1 milliohm, or one ten thousandth of an ohm.

Keep in mind, many DC Disconnect Boxes already have or provide a Shunt of their own. Some are exactly the same dimensions as this shunt, some are not. All 500A/50mV are electrically the same, so you can use the shunt that came with the DC Disconnect if it is also a 500A/50mV Shunt.

Fits (or Compatible with):
  MidNite Solar Mini-DC and other MidNite DC Disconnect boxes.
  Apollo Solar T80 TurboCharger Charge Controller.
  Outback Power PS2DC and FLEXware 500, 1000.
  Just about any other box where you can add the shunt using the included mounting screws.

Features:
  Used in Solar Power Applications to monitor power consumption
  50mV / 500 Amp Current Shunt with mounting screws
  Max. steady state current, amps: 410 Amperes, Thermal time constant: 18 minutes,
  Overload current: If normally operated at less than 300 amps, it will take overloads to 500 amps for durations of less than 5 minutes.
  Mounted to plastic base 3.25" x 1.75". With two mounting holes 0.205" diameter, 1.25" apart on-center. 1.75 inches overall height.
  Battery Cable connections: two bolts (3/8"-16) which are 1.50 in. apart (on-center).

Learn More:
  Click here to see a Trimetric 2020 being added to an Outback PS2DC.
  Learn More from http://www.midnitesolar.com/MNDC%20Instructions.pdf.
  More information is available from http://www.bogartengineering.com/trimetric.htm