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BEP Marine

721

Battery selector 350 A

The BEP 721 battery selector is a robust 4-position switch (Off/1/1+2/2) designed for 12-48V DC systems. With a continuous rating of 350A and a peak rating of 1500A, it is ideal for large diesel engines and demanding installations. It comes with M10 terminals and an insulating rear cover.

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£107.85 GBP

£107.85 GBP ~~£130.83 GBP~~

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Free pickup point from €150 in France
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Custom installation

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Installers near you

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Support service

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Technical specifications

Nominal voltage	12
Amperage	350.0
Nombre de circuits	2.0
Nombre de pôles	1
Parcs de batteries supportés	2.0
Type d'interrupteur de batterie	1-2-Both-Off
Méthode de contrôle de l'interrupteur de batterie	Manual
Mounting type	Flush-mounted
IP rating	IP66
Certifications	CE, FCC, RoHS
Taille maximale de cosse de câble	10
Operating temperature range	0 to 45
Dimensions (W x H x D)	440 x 44 x 220
Weight	2.5
Code-barres du produit	870216000589
Bep Product Series	Battery selectors
Contact Type	Sliding doors
Courant continu (A)	350
Type de contrôle	Manual
Courant de démarrage (A)	1500
Verrouillable à clé	Oui
Fabricant	BEP
Max discharge current (A)	350.0
Maximale tension dc	48
Modular Design	Yes
Mounting orientation	Vertical
Operating voltage range	12-48
Positions	Off, 1, 1+2, 2
Product use	Robust battery selector for managing and selecting battery banks in marine environments and recreational vehicles, suitable for high-load installations.
Recommended continuous discharge current	350.0
Removable Side Panels	Yes
Storage temperature range	-40 to 70
Storage Temperature Range C	-40 to 70
Switch type	Battery selector
Terminal Insulation Cover	Yes
Terminal size	M10
Type de borne	M10 copper-plated studs
Type de connexion câblage	Eye terminal (lug)

Detailed description

The BEP 721 battery selector is a robust switch designed for battery management in marine environments and recreational vehicles. With a continuous capacity of 350A and a peak of 1500A at startup, it is perfectly suited for large diesel engines and demanding electrical systems. This selector offers 4 positions (Off, 1, 1+2, 2) to manage two battery banks, providing total flexibility for load distribution and charging sources.

Robust design for marine use

The BEP 721 stands out for its robust design, including self-cleaning sliding contacts that ensure reliability and increased longevity. It is flame-resistant, making it safe for installation in engine compartments. Its tinned copper M10 (3/8 inch) terminals provide a reliable connection and optimal conductivity. Unlike more compact models such as the BEP 710 (300A continuous), the 721 offers an additional safety margin for the most demanding installations.

Optimized installation and safety

This selector is designed for flexible installation, with removable side panels and a rear cover insulating the terminals against short circuits. It can be surface-mounted or flush-mounted. For maximum safety, the switch can be locked with a padlock, completely isolating the electrical circuit. Its modular design allows easy integration with other distribution products in the BEP range.

Documentation

Type	Nom
	EN - User Manual - BAT SW B1B2 SELECTOR 350A CONT MC10
	EN - Dimensional technical drawing - BAT SW B1B2 SELECTOR 350A CONT MC10

Expert opinion

Pol CONIN

Digital Manager

« The standard for high power systems »

The BEP 721 battery selector is a must-have for serious marine installations. Its 350A continuous and 1500A peak capacity makes it ideal for high-power diesel engines and large battery banks. Self-cleaning contacts and M10 tinned copper terminals ensure conductivity and reliability under the toughest conditions. It is the go-to choice for professionals due to its robustness and ease of integration.

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Battery selector 350 A

£107.85 GBP

£107.85 GBP ~~£130.83 GBP~~

Frequently Asked Questions

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What is a BEP 1-2-Both-Off battery selector?

The BEP BAT SW B1B2 SELECTOR 350A CONT MC10 battery selector is a rotary switch designed to efficiently manage your boat's electrical power. It allows you to select one of two batteries (1 or 2), use both batteries simultaneously (Both), or completely cut off power (Off).

What is the DC current capacity of this battery selector?

This BEP battery selector is designed to handle a continuous current of 350 amperes (A). This capacity ensures stable and secure power supply for most critical marine equipment.

For which voltage systems is this selector designed?

This battery selector is primarily designed for 12V DC systems. However, it can support voltages up to 48V Max, making it compatible with 12V, 24V or 48V DC systems.

How many battery banks can this switch manage?

The BEP BAT SW B1B2 selector is specifically designed to manage two separate battery banks, typically named Battery 1 (B1) and Battery 2 (B2).

What are the available positions on this battery selector?

This selector provides four main positions for flexible power management:

1 : Selects battery bank 1 only.2 : Selects battery bank 2 only.Both : Connects both battery banks in parallel.Off : Disconnects all batteries from the circuit.

Is this battery selector suitable for marine use?

Yes, this battery selector is a critical component designed specifically for reliable power management aboard vessels, ensuring durable performance in the marine environment.

What are the advantages of using a battery selector switch?

Using a battery selector switch provides several critical benefits for a boat:

Flexible management: Allows selection of the power source (battery 1, battery 2, or both). Isolation: Isolates batteries to prevent cross-discharge or for storage. Emergency start: Enables use of a service battery to start the engine if the starter battery fails. Safety: Provides an OFF position to cut all electrical power to the boat.

Is this selector compatible with 24V or 48V systems?

Yes, although designed for 12V DC systems, this selector can support continuous voltages up to 48V Max. It is therefore compatible with 24V and 48V DC systems.

Can I use this selector with different types of batteries, such as lithium or lead-acid batteries?

Yes, this battery selector is an electrical switch that manages current flow and voltage, regardless of the battery's internal chemistry. It is therefore compatible with different battery types, including lead-acid batteries (gel, AGM, flooded) and lithium batteries, provided voltage and DC current specifications are met.

Is it compatible with alternators?

Yes, a battery selector is an essential component in an alternator charging system. It directs the alternator's charging current to the selected battery bank or both banks, ensuring efficient and safe charging.

Is the selector supplied with installation instructions?

Yes, this product is typically supplied with detailed installation instructions to facilitate proper mounting and wiring on your boat.

Which types of cables are recommended to connect this selector?

To connect this battery selector, use heavy-duty marine-grade cables. Cable diameter must be selected based on maximum amperage (350A for this selector) and cable length to minimize voltage drop and ensure system safety.

Are there any specific precautions to take during installation?

When installing this selector, it is crucial to follow electrical safety precautions. Ensure all power sources and batteries are disconnected before starting the installation. Strictly adhere to the wiring diagrams and polarity to avoid short circuits or damage to equipment.

Is special tooling required for installing this switch?

Installing this switch generally does not require specialized tools. Basic tools such as a screwdriver, socket wrench, wire strippers, and crimping pliers for cable terminals will be sufficient.

Is this product covered by a warranty?

Yes, like most BEP products, this battery selector is covered by the manufacturer's warranty. For specific details regarding the duration and warranty conditions, please refer to the documentation provided with the product or contact customer service.