12 volt double battery voltage monitor

About the Double Battery Voltage Monitor

Use this device to monitor the charge levels of two separate 12 volt batteries. Typical applications will be dual/double battery systems in a RV, 4WD, car, caravan, motor home, camper and boat. It is typically mounted in the cab area of a vehicle or on the outside of a battery box.

Can also be used in single battery applications - just tie the two positive wires together. Typical applications will be the home shed light, which can go flat on you without any warning or anywhere where you need to know the charge level of a 12 volt battery.

This unit has a proven track record and was used in some of South Africa's most rugged terrains over the past four years. Over 500 units were fitted in 4WD vehicles with no comebacks.

General information

• Black ABS plastic box
• Vinyl sticker
• 2 meters long connection wires
• 3 different colour LED - green, yellow and red
• Manufactured in South Africa

Specifications

• Microprocessor-controlled
• Dimensions: W (35 mm) x L (50 mm) x H (13 mm)
• Voltage: 12 volt
• Current: 20 milliamps
• Accuracy better than 1%
• Reverse voltage protected
• Internally PTC fused (self resetting)
• Supply input 'spikes' LC filtered and clamped
• Internal 'watchdog'
• Voltage measurement input RC filtered and clamped

Owner benefits

• Two monitors for the price of one
• Epoxy encapsulated for waterproofing
• Multiplexing of LEDs for low current use
• Vinyl sticker on enclosure for durability and permanence
• Long connection wire for easy installation
• Microprocessor controlled for accurate display of battery voltages
• Protection on all inputs for ruggedness
• Micro-controller 'watchdog' for automatic resetting after malfunctions
• Low current draw for prevention of flat batteries during their non-charge cycle
• Three LED colours for seeing voltage levels at a glance
• Internal PTC self-resetting fuse for protection against short-circuits