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Cristec Advanced Digital Battery Monitor

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  • Cristec Battery Monitor for Boats
  • 3-bank Capacity Display
  • Battery Monitor Kit Contents
  • Back panel
  • Cristec Battery Monitor Wiring Diagram


Cristec battery monitor for 12 V, 24 V and 48V batteries - Cristec part number JPNUMII-CPS3

The Cristec battery monitor is unlike any other battery monitor on the market, and is made specifically for the cruising sailor to monitor multiple sources (wind, solar, hydro, genset, etc),  or up to 3 battery banks.   It can monitor up to 3 banks for voltage, amperage, capacity and temperature (with appropriate optional shunts/sensors), and 2 more banks for voltage alone.  It can alternatively be set up to monitor incoming sources like wind, solar, or other gensets alone.  No other monitor can do this.   It also gives you true current (Amp) information, which is one of the values that we care most about when relying on alternative energy sources such as solar or wind power.

The monitor can monitor up to three batteries with up to 2000 Ah simultaneously.

The attractive display is easy to install, understand and operate.  It uses a low-power draw backlit LCD display, with large readable text and icons, and is operated via three buttons on the faceplate.

- The number of the monitored batteries can be set (1, 2 or 3) 
- Capacity of each battery 
- Deep discharge alarm for each battery (adjustable)
- An audible alarm can be also be switched on 
- The capacity of up to 3 batteries can be displayed in Ah, as well as the voltage of 2 more batteries
- The backlight duration is also adjustable.
- A switch contact is included for generator start

Technical data:
- Input  voltage: from 8 V to 60 V DC 
- Power consumption: 23 mA without backlight / With backlight 87 mA 
- Measuring range: 
         Batteries 0-35 V DC 
         Current. -250 A to 250 A 
         Temperature of 0 to + 70 degrees Celsius 
- Display Accuracy: 
         Voltmeter: 0.02 V 
         Current: 0.1 A 
         Temperature: 0.5 ° C (with connected temperature sensor) 
         Measurement Accuracy +/- 0.5%

- Alarm: Acoustically via a buzzer and / or visually by a flashing light

- Display: graphic, white LCD screen positive with a resolution of 128 x 64 pixels with backlight
- Dimensions: 120 mm x 120 mm / Display 62 mm x 44 mm 
- Mounting Dimensions: H 95mm x W 100 mm x D 35 mm 
- Operating temperature: 0 to + 50 degrees Celsius

What is Included:

NOTE:  In order to measure voltage, current and capacity you will need a shunt for each battery bank or generating source.  The standard kit includes only one 250A measurement shunt for monitoring only one battery bank, or one input source (refer to wiring diagram above).   So, with the standard kit, you can monitor one bank for voltage, current, and capacity, plus two additional banks for voltage only.  You will need a shunt kit for each additional device or battery bank that you wish to monitor.   The standard kit includes the battery monitor, and one (1) 250A shunt, as well as one 10 Meter RJ11 shunt cable and two 10 Meter power cables for the meter itself.  

Additional 250A and 500A shunt kits available from Marinebeam.  See the related products tab for more  info, or feel free to call us with questions.

Basic Shunt Knowledge:

To measure the current coming from a source or being removed from a battery, a shunt is used.   Any energy flowing through the shunt is measured by the monitor.   If you want to measure the net current, which is the energy provided by the energy sources minus the energy being consumed onboard, you would be sure that both the energy flowing to the battery and the energy being removed are flowing through a single shunt.     However, let's say you want to see only the power that the solar panel is providing.  In this case the shunt would be isolated between the panel and the battery, such that there are no loads attached to the shunt.  Then only the power going into the battery would be shown on the meter.   There are many possibilities, depending on the number of shunts and the way they are wired.

Note: Marinebeam has scoured the globe in our search for the perfect battery monitor to use with our wind and hydro systems.  We evaluated 10 different companies before settling on our choices of the best of the best.   Because of our deep involvement in marine energy and charging, we looked for the best monitor for the cruising sailors using multiple banks, and multiple sources (solar, wind, gensets, etc).   The Cristec fit the bill.

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