Blue Sea Systems m-Series Mini Selector Battery Switch, 4 Position, Battery Combine, 300A, 32V DC, IP66

Overview

The Blue Sea Systems m-Series Mini Selector Battery Switch is a 4-position battery switch for boats with two battery banks, letting the operator select bank 1, bank 2, both banks combined, or OFF from one control. It is rated for 32V DC systems, with 300A continuous, 500A intermittent for 5 minutes, and 900A starting for 30 seconds, which makes it a practical fit for outboards and small gasoline or diesel engine installations.

The make-before-break contact layout allows switching between battery banks without interrupting power, while the combine position can bring both banks online when the electrical system calls for it. The switch uses tinned copper terminal studs and accepts 3/8 in or M10 ring terminals, with cable clearance for 4/0 AWG cables.

Key features

• Selector 4-position operation gives the helm or battery compartment a single control for OFF, battery 1, battery 2, and battery combine functions.
• Battery combine capability lets both banks feed the load side when that operating mode is needed.
• Make-before-break contact action helps keep connected loads powered while changing between battery banks.
• 32V DC maximum voltage and 300A continuous rating support common low-voltage DC marine starting and house battery layouts.
• IP66 rating and ignition protection support installation in exposed marine areas and aboard gasoline-powered boats when installed correctly.
• Tinned copper 3/8 in-16 terminal studs accept 3/8 in or M10 ring terminals and help keep high-current connections secure.
• Case accepts surface or rear panel mounting, and #10 mounting screws fit the mounting holes.
• Two battery inputs and 4/0 AWG cable rating give the installer room for a high-current two-bank installation.

Variants

This product is offered in two color configurations. The switch function, ratings, terminal format, and battery combine behavior remain the same across both variants.

The only listed difference is the housing color, so the choice mainly affects how the switch looks in the battery area, electrical panel, cockpit locker, or service compartment.

• 6007, red: Red housing for installations where the battery switch should stand out visually or match a traditional battery disconnect layout.
• 6007200, black: Black housing for panels or compartments where a lower-profile appearance fits better with surrounding electrical equipment.

Installation and fit

This switch is intended for two-bank DC battery systems where the same load side can be fed by either battery bank or by both banks together. It does not include an alternator field disconnect, so alternator protection and switching procedure should be considered as part of the full charging-system layout.

The 3/8 in-16 terminal studs use a 120 in-lb torque value, and the case provides 1.12 in of clearance for 4/0 AWG cable routing. That matters in battery compartments where cable bend radius, lug stack-up, and service access can be tight.

Use cases on board

This switch fits small-boat starting and house-bank layouts where the operator wants manual control over two isolated battery banks and a combine option. It is a good match for center consoles, cruisers, fishing boats, sailboats, and workboats using 12V or 24V battery systems within the switch rating.

The ignition-protected rating is useful for gasoline-powered boats, and the IP66 rating helps when the switch is mounted in lockers, compartments, or areas that may see spray and washdown exposure. Final placement should still allow cable support, strain relief, and clear access to the selector knob.

Orders are processed within 2 business days, which includes verification, packing, and dispatch. Orders of $100 or more qualify for free shipping when eligible. For orders under $100, shipping costs are calculated at checkout based on destination, package weight, and selected service. International shipping is available for eligible products, and certain items may require additional handling, warehouse transfers, or may ship directly from the manufacturer, which can affect processing time.

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We ship throughout the United States and to most international destinations for products eligible for international shipping. International orders may be subject to customs duties, taxes, brokerage charges, or other import fees, which are the customer's responsibility and are not included in the product or shipping price. PO Boxes are accepted only when shipping through USPS, and not all packages qualify for this option. If your order does not arrive within the estimated delivery window, please contact us at info@apollolighting.com or +1 (954) 375-0100 so we can assist with locating your package.

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Returns may be requested within 30 days of receiving your order. Items must be unused, uninstalled, unaltered, and returned in their original packaging with all tags, packing materials, blank warranty cards, manuals, instructions, accessories, and included items. Certain products, including installed or used electronics, electrical components, lighting, consumables, custom or special-order items, cut-to-length products, safety equipment, and merchandise exposed to water or marine conditions, may not be eligible for return.

To request a return, sign in to your account and select the applicable order and items, and submit your request for review. Eligible unfulfilled items may also be submitted for cancellation within 1 hour of placing the order. Returns or cancellations are not considered approved until you receive confirmation from Apollo Lighting. Please do not ship or drop off merchandise before receiving return approval and instructions.

Customers are responsible for arranging and paying for return shipping unless the return is due to an error by Apollo Lighting or the item is verified as defective, damaged, or incorrect. Missing, damaged, defective, or incorrect items must be reported within 2 business days of delivery, and photos or other documentation may be required for review. If the issue is verified, Apollo Lighting may provide or reimburse return shipping and issue a replacement or refund depending on the circumstances. International customers are responsible for return shipping, duties, taxes, customs charges, brokerage fees, and other costs associated with an international return.

After your return is received and inspected, approved refunds are issued to the original payment method and may take 5-7 business days to appear after processing. Original shipping and handling charges are nonrefundable, and the value of any included free items that are not returned may be deducted from the refund. Apollo Lighting does not charge a standard restocking fee on eligible returns. Returns that are incomplete, damaged, installed, used, altered, improperly packaged, or otherwise do not meet the eligibility requirements may be refused. We recommend using a trackable and appropriately insured shipping service for all customer-arranged returns.

For assistance, contact info@apollolighting.com or call +1 (954) 375-0100.

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Many products sold by Apollo Lighting include a manufacturer's warranty covering defects in materials or workmanship. Warranty terms vary by brand, product category, and model, so eligibility, coverage duration, exclusions, and available remedies are determined by the applicable manufacturer. We recommend reviewing the warranty information provided with your product before installation or use, especially for marine electronics, navigation equipment, lighting, electrical systems, pumps, safety equipment, and other specialized marine products.

If you need warranty service, the claim must follow the process established by the manufacturer, authorized service center, or designated warranty provider. You may be asked for proof of purchase, a serial number, product registration, photos, maintenance or installation records, or other documentation. Apollo Lighting does not determine or modify a manufacturer's warranty coverage or final claim decision, but we are happy to help provide purchase information and direct you to the appropriate manufacturer or warranty resource.

Keep your receipt, product documentation, serial number information, and original packaging when practical. Damage caused by normal wear, misuse, improper installation, insufficient maintenance, corrosion, impact, unauthorized modifications, electrical issues, or operation outside the manufacturer's specifications may not be covered. Warranty claims are separate from standard returns, so a product that has been installed, used, or exposed to marine conditions may no longer qualify for return while still remaining eligible for evaluation under the manufacturer's applicable warranty.

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