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BEP Marine

720-MDO

Battery switch 720-MDO 500 A

The BEP 720-MDO 500A motorized battery switch is designed for remote switching of 12/24 V marine batteries. It features an exclusive temporary emergency paralleling function (10 minutes) for emergency starting, a continuous capacity of 500 A, and an IP65 protection rating. Supplied with a 7-wire control harness and a set of labels (ref. 713).

Retail priceBenefit from the professional rate

$269.80 USD

$269.80 USD ~~$390.97 USD~~

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Free pickup point from €150 in France
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Technical specifications

Nominal voltage	12/24
Amperage	500.0
Nombre de circuits	1.0
Nombre de pôles	1
Parcs de batteries supportés	2.0
Type d'interrupteur de batterie	Electromechanical
Méthode de contrôle de l'interrupteur de batterie	Manual and automatic
Mounting type	Flush or surface-mounted
IP rating	IP65
Display type	LED
Certifications	UL 1107, Ignition-protected
Taille maximale de cosse de câble	12
Dimensions (W x H x D)	102 x 102 x 110
Code-barres du produit	50843687003736
Battery Bank Voltage Matching Requirement	Both battery banks must be of the same voltage (12V or 24V)
Courant de bobine (mA)	13.5
Tension de la bobine	12/24 V
Courant continu (A)	500
Type de contrôle	Remote (motorized), Manual/Automatic
Courant de démarrage (A)	2500
Housing material	High-temperature fiberglass reinforced plastics
Courant intermittent (A)	700
Nom du fabricant	BEP
Max charge current (A)	500.0
Max discharge current (A)	500.0
Max Terminal Stud Torque	25
Maximale tension dc	32
Operating voltage range	8 to 32
Diamètre de découpe du panneau	52
Peak discharge current	2500.0
Positions	ON, OFF, Emergency parallel mode
Catégorie de produit niveau 0	Merchandise
Product category level 1	NAVICO GROUP
Product category level 2	11 - BEP
Product category level 3	CZone (35)
Product use	Remote battery management and emergency paralleling
Recommended continuous discharge current	500.0
Recommended Torque Nm	18
Switch type	Remote-controlled motorized switch
Terminal size	2 x 12 mm (1/2")
Type de borne	Studs
Type de connexion câblage	7-wire control harness, Wago connector

Detailed description

The BEP 720-MDO 500A battery switch is a motorized switch designed for remote battery management on professional and recreational boats. Unlike a simple manual battery switch such as the BEP 701-MD, the 720-MDO model includes a motor and control electronics, allowing the switch to be placed as close as possible to the batteries. This significantly reduces the length, cross-section, and cost of high-current wiring. It differs from the 720-MD-EP model by its Emergency Parallel function, which, when activated remotely, temporarily connects two batteries for emergency starting. This function is automatically disabled after 10 minutes to prevent discharge of the service battery.

Remote control and emergency parallel

The 720-MDO is operated using a remote key switch (not included). Its automatic mode allows precise control of the battery state: LED off for off, LED on for on. The Emergency Parallel function is a major safety feature: in case of a discharged starting battery, the user can activate a temporary 10-minute parallel connection to start the engine. This timer prevents any oversight and protects service batteries. Unlike the 720-MD-EP model, which only offers on/off switching, the 720-MDO provides an additional backup function without requiring complex wiring.

Technical specifications and robustness

With a continuous rating of 500 A, an intermittent rating of 700 A, and a cranking current of 2500 A, this battery switch is perfectly suited for high-power engines. Its tinned copper and stainless steel construction, combined with an IP65 protection rating, ensures excellent resistance to corrosion and humid marine environments. The operating voltage range is 8 to 32 V DC, making it compatible with 12 V and 24 V systems, provided both batteries are of the same voltage. The housing can be flush-mounted or surface-mounted, offering great installation flexibility.

Installation and connectivity

The 720-MDO connects via two 12 mm studs (1/2 inch) for the main circuit and a 7-wire control harness. The recommended tightening torque is 18 Nm (maximum 25 Nm). Its UL 1107 certification (ignition protection) makes it safe for installation in engine compartments. Compared to competitors such as Blue Sea Systems remote switches, the BEP 720-MDO stands out with its timed Emergency Parallel function and low standby power consumption (5 mA at 12 V).

Documentation

Type	Nom
	EN - User and Installation Instructions - BAT SW MD HD 12/24V 500A OPTICS MC6
	EN - Product Launch Press Release - BAT SW MD HD 12/24V 500A OPTICS MC6
	EN - User and Installation Instructions - BAT SW MD HD 12/24V 500A OPTICS MC6
	EN - Wiring Instructions - BAT SW MD HD 12/24V 500A OPTICS MC6
	EN - Product Launch Press Release - BAT SW MD HD 12/24V 500A OPTICS MC6
	EN - Operating and Installation Instructions - BAT SW MD HD 12/24V 500A OPTICS MC6

Expert opinion

Pol CONIN

Digital Manager

« Expert: Motorized switch with integrated emergency paralleling »

The BEP 720-MDO is a highly advanced battery management solution for installations requiring both remote switching and enhanced safety. The Emergency Parallel function is a real asset: it eliminates the need to wire a separate paralleling relay and includes a 10-minute delay that protects your service batteries from deep discharge. The switch can be placed near the batteries, reducing voltage drops and simplifying high-current wiring. The IP65 rating and corrosion-resistant construction make it a reliable piece of equipment for demanding marine environments. Be sure to respect the 18 Nm tightening torque on the studs to ensure optimal connection.

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Battery switch 720-MDO 500 A

$269.80 USD

$269.80 USD ~~$390.97 USD~~

Frequently Asked Questions

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What is the DC current capacity of this battery switch?

This motorized battery switch has a continuous capacity of 500 amperes DC.

What is the maximum cranking current supported by this model?

It can support a cranking current up to 2500 amperes DC.

What is the maximum operating voltage of this battery switch?

The maximum voltage is 32 V DC for powering the engine and the electronic circuit, and can go up to 50 V DC for the switch contacts.

Is this battery switch compatible with 12V and 24V systems?

Yes, it is designed to operate automatically across a DC voltage range of 8 to 32 Volts, making it fully compatible with 12V and 24V battery banks.

Is the battery switch resistant to water and dust?

Yes, it has an IP65 protection rating, meaning it is protected against water jets and dust, ideal for a marine environment.

What is the size of the connection studs?

The device is equipped with two 12 mm (1/2") tinned copper studs for high-current connections.

What is the recommended torque for connection studs?

The recommended torque is 18 Nm. Do not exceed the maximum torque of 25 Nm to avoid damaging the terminals.

What is the power consumption when the battery switch is off?

When in the off position, power consumption is extremely low, less than or equal to 5 mA (for 12V or 24V systems).

How much power does it consume when activated in automatic mode?

In "Auto On" mode, power consumption is 9 mA on a 12V system and 13.5 mA on a 24V system.

What are the mounting options for this motorized battery switch?

It can be installed in two ways: recessed mounting or surface mounting, depending on the configuration of your electrical panel or battery compartment.

Is this device ignition-protected for installation in an engine compartment?

Yes, it is ignition-protected and meets UL 1107 standards, allowing safe installation near gasoline engines.

What materials are used to manufacture this battery switch?

It is made with high-temperature fiber-reinforced plastics. The conductors and studs are made of tinned copper, and the nuts are made of stainless steel for maximum resistance to marine corrosion.

How to tell if the battery switch is on or off via the LED?

It's very simple: if the LED is lit, the battery switch is activated (On). If the LED is off, the device is deactivated (Off).

What does a rapid flashing of the LED on the device indicate?

A rapid flashing pattern (on 0.1s / off 0.1s) indicates either that the voltage is outside specifications (below 8V or above 30V), or that the battery switch is in forced manual control mode.

How are the control cables connected?

The device uses a 7-wire connection cable, including a Wago terminal block for the main wires (red, green, black) to simplify connection to the remote switch.

Is it possible to manually activate the battery switch in case of an electrical failure?

Yes, this model has a manual override function that allows you to turn it on or off physically if the electrical system fails.

How does emergency battery parallel connection work?

The remote switch enables parallel connection for a 10-minute duration. To disable this function before the timer expires, hold the remote switch pressed for 6 seconds.