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BEP Marine

701-MDVS

Motorized voltage-sensitive battery switch (VSS) 701-MDVS

The 12V motorized battery switch sensitive to voltage BEP (275A continuous, 1250A cranking) automates the protection of your battery banks with its integrated VSS relay and emergency coupling function. The motorized evolution of the renowned 701 mechanical series, it ensures reliable isolation with IPX6 certification and 10 mm tinned copper studs.

Includes: 701-MDVS motorized battery switch, removable access panels.

Price excl. import taxesBenefit from the professional rate

£158.36 GBP

£158.36 GBP ~~£199.77 GBP~~

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Prices exclude import taxes. DAP delivery: import taxes are paid on delivery.

Awaiting restock

Free pickup point from €150 in France
Pickup at Skysat possible

Custom installation

Trust Skysat to install the equipment on board

Request a quote

Installers near you

thanks to our network of approved installers

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Support service

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Technical specifications

Amperage (A)	275.0
Number of circuits (circuits)	1.0
Number of poles	1 pole
Supported battery banks	2.0
Battery switch type	Powered
Battery switch control method	Remote
Circuit protection method	Protection against deep discharges, Spark-proof
Integrated VSR	Oui
DVSR continuous current rating (A)	275.0
Mounting type	Flush-mounted or surface-mounted
Display type	LED
Maximum cable lug size	10 mm
Coil current (mA)	15
Coil voltage	12 V
Continuous current (A)	275
Control type	Automatic (voltage detection), Manual (remote)
Cranking current (A)	1250
Discharge cut-off voltage	12.2
Emergency Parallel Flash Pattern	Long Flash: 5 Secs ON & 0.5 Secs OFF
Emergency parallel function	Yes
Housing material	Fiberglass reinforced plastics
Intermittent current (A)	455
Max charge current (A)	275.0
Max discharge current (A)	275.0
Model name	701-MDVS
Nut Material	Stainless steel
Operating voltage range	8 to 15 V
Operating Voltage Range 24v	15 to 30
Peak discharge current	455.0
Positions	Auto, Manual On/Off, Emergency Coupling
Product use	Automated battery bank management on board vessels
Recommended continuous discharge current	275.0
Storage temperature range	-40 to +80 °C
Switch type	Motorized voltage-sensitive battery switch (VSS) with emergency coupling
Terminal size	2 x 10 mm (3/8")
Terminal type	Tinned copper studs
Vss Disengage Delay Engine	5
Vss Disengage Delay Non Engine	3
Vss Disengage Voltage Engine Source	12.2
Vss Disengage Voltage Other Sources	13.0

Detailed description

The BEP 701-MDVS motorized battery switch is designed to automate the management of battery banks on board vessels. Operating at 12V, it combines the features of a charge relay (VSS) and an emergency parallel switch. Capable of handling a continuous current of 275A and up to 1250A peak during start-up, this module ensures high-power electrical distribution while protecting batteries from deep discharge thanks to its automatic cut-off algorithms.

Automated management and emergency coupling

Unlike the standard manual model 701 in the same range, the 701-MDVS integrates a motorized system and advanced voltage detection module. In automatic mode, it continuously monitors the charge state: if the voltage drops below 12.2V for more than 5 minutes, the system disengages to preserve the integrity of the starter battery. It also features an exclusive Emergency Parallel function allowing manual or remote connection of battery banks in case of failure. An integrated LED indicator provides real-time system status via different light codes (rapid flashing for voltage errors outside the 8–15V range, long flashing for parallel mode).

Installation and reliability in marine environments

Its 10 mm (3/8") tinned copper studs and stainless steel nuts ensure optimal conductivity and corrosion resistance. Power consumption remains extremely low, with only 15 mA drawn in the off position.

Documentation

Type	Nom
	EN - Schéma de câblage - BAT SW MDVS 12V 275A CONT MC6
	EN - Instructions d'utilisation et d'installation - BAT SW MDVS 12V 275A CONT MC6

Expert opinion

Pol CONIN

Digital Manager

« Secure automation and physical redundancy for battery bank management »

The BEP 701-MDVS motorized battery switch is a strategic solution for energy management on vessels equipped with 12V systems, where engine-start reliability and service battery longevity are critical. Its VSS (Voltage Sensitive Switching) function automates the connection and disconnection of battery banks, ensuring the starter battery remains isolated and charged while protecting service batteries from deep discharges. This automation reduces crew workload and minimizes human error risks compared to manual switches.

The inclusion of an emergency coupling mode, manually or remotely activable, provides essential redundancy in case of a battery bank failure, allowing access to reserves to power critical functions or start the engine. For optimal installation, it is imperative that the device’s negative line be connected to the same battery it isolates, to ensure stable and accurate voltage detection. Its robust and ignition-protected design makes it suitable for demanding marine environments.

This module is particularly relevant for boats requiring intelligent and autonomous management of their energy resources. It stands out from manual battery switches by actively monitoring battery status and making decisions for their preservation, thereby offering increased peace of mind and optimized equipment lifespan.

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Motorized voltage-sensitive battery switch (VSS) 701-MDVS

£158.36 GBP

£158.36 GBP ~~£199.77 GBP~~

Frequently Asked Questions

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What is the 701-MDVS BEP motorized battery switch?

The 701-MDVS from BEP is a motorized battery switch sensitive to voltage (VSS), designed to automate the management of battery banks aboard vessels. It combines the features of a charge relay and an emergency parallel switch.

What is the primary function of the 701-MDVS battery switch?

Its primary function is to automate battery bank management by monitoring their state of charge and protecting them against deep discharges. It also provides an emergency coupling function to link battery banks if necessary.

What is the nominal operating voltage of the 701-MDVS?

The 701-MDVS is specifically designed to operate with 12V DC battery systems. Its operating voltage range is 8 to 15V DC.

What are the current ratings of the 701-MDVS?

The 701-MDVS can handle a continuous DC current of 275 amps, an intermittent current of 455 amps DC, and a peak starting current of up to 1250 amps DC.

How does the 701-MDVS protect batteries against deep discharges?

In automatic mode, the system continuously monitors battery voltage. If the voltage drops below 12.2V for more than 5 minutes, the system automatically disengages to preserve the integrity of the starter battery.

What is the Emergency Parallel function?

The emergency coupling function allows manual or remote linking of battery banks in case of failure, ensuring a backup power source for starting or other critical needs.

How does the LED indicator on the 701-MDVS work?

The integrated LED indicator provides real-time system status via different light codes:

A rapid flashing (0.1 sec ON / 0.1 sec OFF) indicates voltage out of specification (below 8V or above 15V). A long flashing (5 sec ON / 0.5 sec OFF) indicates that the emergency parallel mode is engaged. A medium flashing (1 sec ON / 1 sec OFF) indicates that the VSS is in low-voltage disconnect mode (voltage below 12.2V/24.4V). A solid LED indicates that the VSS is engaged. An unlit LED indicates that the VSS is disengaged.

What is the power consumption of the 701-MDVS in standby mode?

The power consumption of the 701-MDVS battery switch is extremely low, drawing only 15 mA when the switch is in the off position.

Which materials are used for the bolts and nuts of the 701-MDVS?

The 10 mm (3/8") studs are made of tinned copper and the nuts are made of stainless steel. These materials ensure optimal conductivity and excellent resistance to corrosion in a marine environment.

What are the mounting options available for the 701-MDVS?

The mechanical installation of the 701-MDVS is flexible, allowing surface-mount or flush-mount installation depending on the requirements of your dashboard or battery compartment.

What is the size of the connection studs on the battery switch?

The 701-MDVS is equipped with two 10 mm (3/8") tinned copper studs for power connections, ensuring a robust and reliable connection.

What is the maximum recommended cable size for the 701-MDVS?

The maximum recommended cable size is 50 mm² (1/0). If using a cable larger than 50 mm², it must be strain-relieved, with an absolute maximum of 70 mm² (2/0).

How should the negative (black) wire of the 701-MDVS be connected?

It is imperative that the negative (black) wire of the 701-MDVS be connected to the same battery that it is isolating. Only one negative connection must be provided to each unit for correct operation and to avoid erratic behavior.