Effective battery charging and monitoring for motorhomes, caravans, boats and self-sufficient solar systems!

How much charge does my on-board battery actually have left? Is the battery really full? Why is energy being drawn from the battery despite consumers being switched off?

The VOTRONIC LCD battery computer S answers these questions to the exact percentage (%) and ampere hour (Ah). At the touch of a button, it provides comprehensive information on the current charge status of the battery, the battery currents flowing and the voltage level of the battery.

The device is in constant contact with "its battery" and thus registers and evaluates all battery actions. All charging and discharging currents are meticulously counted, battery size, self-discharge, battery load etc. are taken into account using programmed characteristic curve fields. The remaining battery capacity is then calculated from the measured values and the battery size. The result is the correct display of the state of charge (remaining capacity, residual charge) of the on-board battery as a numerical value in ampere hours ("Ah") and in percent ("%") as well as a clear fill level bar, like a fuel gauge.

The LCD battery computer S is suitable for all battery types (acid, gel, AGM, lithium adjustable) with 12V and 24 V battery voltage. Of course, the current battery voltage ("V") and the current battery current ("A") are also available in the display. Discharge currents (consumers) are indicated by a minus sign. Charging currents are also indicated by a clearly legible "Charge" symbol. Independently of this, there is a further display option for the voltage of a second battery, e.g. for monitoring the vehicle's starter battery.
A plug-in connection cable connects the display completely to a robust precision measuring resistor (shunt), which is connected directly to the negative terminal of the on-board battery and at which the voltages and currents of the battery are recorded.

The following values are measured:

• On-board battery voltage
• Battery voltage starter battery
• Battery current (charging ="+"; discharging ="-")
• Load from consumers
• Battery capacity "Ah" (remaining charge in ampere hours)
• Battery capacity "%" (remaining charge in percent)
• Switching output (freely programmable)
• Flashing warning display in the event of undervoltage or overvoltage

Can I also program the battery computer?

The LCD battery computer S has a freely programmable switching output for control, monitoring and warning purposes, e.g. to automatically switch loads or issue a warning depending on the charge status of the on-board battery (0-100%). On and off switching points can be set freely and independently of each other in %, enabling any number of switching functions. They can also be overridden manually at any time at the touch of a button. Application example: Automatic protection of the battery against harmful deep discharge, the consumers are switched off exactly according to the state of charge, e.g. at less than 25% state of charge

How is the battery computer connected?

A plug-in connection cable connects the LCD display completely to a robust precision measuring resistor (shunt), which is connected directly to the negative terminal of the on-board battery and at which the battery voltages and currents are recorded. The switching output for connecting signal transmitters or powerful switching relays is also located here.

Can I also use a different shunt?

The display is supplied with a suitable measuring shunt; the devices are matched to the measuring shunts included in the scope of delivery and cannot be operated in conjunction with other measuring shunts or interchanged!

Technical data

• Article no.: 1269
• Measuring shunt: 400A
• LiFePO4 battery voltage: 12.8-13.2 V / 25.6-6.4 V
• Current consumption: 8mA
• Battery nominal capacity, adjustable: 50-2000 Ah
• Current consumption of the lighting (can be switched off): 60 mA
• Current measuring range shunt / continuous: 400A
• Current measuring range shunt / 15 min.: 600A
• Current measuring range shunt / 7 min.: 1800A
• Test mark: CE, E-test (EMC/vehicle directive)
• Dimensions: W80 x H85 x D24 mm
• Installation dimensions: W66 x H72 x D22 mm
• Shunt dimensions: W135 x H30 x D42mm
• Display weight. 55g
• Weight of smart shunt: 245g

Scope of delivery:

• Display unit
• Measuring shunt 400A
• Smart-Shunt cover
• Connection cable 5m long
• Ground strap
• Fixing screws
• Instruction manual
• Drilling template