Battery monitor shunt
The other device is the Hall effect sensor. Resistive shunts are wired in series with the circuit measured. These shunts are generally made of manganin-an alloy of copper, manganese, and nickel, which maintain a stable resistance over temperature extremes. One is by measuring the voltage drop across a resistive shunt with very low resistance in the line from the battery. Basically there are two ways that these devices sense current flow. The various models differ in the number of inputs that they can monitor.
#Battery monitor shunt generator
When running your alternator or generator (solar, wind, etc.) at the same time, the microprocessor will add that current input to your system and give you an accurate reading of the net rate of charge or discharge at the time. The remaining life of a battery, regardless of how one chooses to report it, is dependent on a number of factors: the size in ampere-hours of the battery or battery bank involved, its age, the ambient temperature, the rate of discharge, and the number of and length of discharge cycles. This display can be either in operating hours left (as on the E-Meter and the Link 2000) or in ampere-hours (as with the two SALT models).
#Battery monitor shunt full
The battery monitors we tested will all read your rate of discharge and feed it to a microprocessor that is programmed to multiply it by the time elapsed, subtract that result-in ampere-hours-from whats available in a full battery, apply some preset (or user-set) information, and display how much battery life is remaining. To these we added the Heart Interface Link 2000-essentially a pair of E-Meters in one package-with a pair of shunts so that it can handle two banks of batteries and a different model of the SALT System, which uses resistive shunts in place of the Hall effect loops. The E-Meter is a single battery (or single battery bank) unit that uses a resistive shunt as a current sensor, while the SALT monitors up to four banks of batteries (or an equal number of current-consuming devices) that relies on Hall effect current sensors. And, while we were at it, we added two more products not previously tested. We decided to take another, closer look at the two monitors.
![battery monitor shunt battery monitor shunt](https://www.outbackmarine.com.au/assets/full/VIC.SHU050210050.jpg)
It didnt take long for the folks at Sea Air Land Technologies, manufacturers of the SALT system, to cry Foul! Measuring and reporting on energy remaining, they pointed out, is one of the primary functions of their system.
![battery monitor shunt battery monitor shunt](https://www.emarineinc.com/resize/Shared/images/Product/Victron/Monitors/Victron-Battery-Monitor-BMV-702-shunt-top.jpg)
In the Februissue, we reviewed battery monitors and stated that Cruising Equipments E-Meter was the only one of the four models tested that could tell you how much energy remained in the battery.