Blue Sea Systems m-LVD Low Voltage Disconnect, 12V, 65A, IP67

Overview

The Blue Sea Systems 7635 is a 12V low voltage disconnect that drops non-essential DC loads before the battery is pulled too low. It carries 65A continuously, handles 115A for 5 minutes, and lets you set the disconnect point from 11.3V to 12.1V, with a 13V reconnect point.

This is a battery protection device, not a battery combiner or charging relay. It gives a visual low-voltage warning before it opens the circuit, supports an optional alarm output, and includes a remote control switch so the disconnect setting and override functions can be handled from a more convenient spot. The housing is IP67-rated for temporary immersion and can be mounted on the surface, through the front panel, or from the rear.

Key features

• 12V DC low voltage disconnect for non-essential loads on single-battery systems
• 65A continuous rating and 115A intermittent rating for 5 minutes
• Adjustable disconnect setting from 11.3V to 12.1V, with reconnect at 13V
• Included remote control switch allows threshold adjustment, 10-minute override, and temporary OFF control until voltage rises
• Status light on both the unit and remote switch warns before disconnect, with alarm output available for an optional audible warning
• Surface, front-panel, or rear-panel mounting to suit different helm and electrical panel layouts
• IP67-rated for temporary immersion and compliant with ISO 8846 and SAE J1171 external ignition protection requirements
• 1/4 in-20 (M6) tinned brass studs accept up to 1/0 AWG cable

What’s included

• m-LVD Low Voltage Disconnect
• Remote Control Switch

Compatibility and fit

This unit is for 12V DC systems. It fits installations where stereo loads, lighting, pumps, or other non-essential house circuits need to be dropped automatically so more battery capacity is left for engine starting or battery recovery in a single-battery setup.

It is not the right choice for 24V systems or for combining charging sources between batteries. Where ignition-protected equipment is required, its ISO 8846 and SAE J1171 compliance is an important fit detail.

Installation and setup

Mounting can be done on the surface, from the front panel, or from the rear panel, which helps when space behind a helm, locker face, or electrical panel is limited. The rear insulating cover keeps the back contacts protected once the wiring is in place.

The remote control switch is included. From that switch you can adjust the disconnect setting in 0.2V steps, delay a disconnect for 10 minutes with Override, or turn the circuit off until voltage rises again. A status light on both the main unit and the remote switch shows when low voltage warning or disconnect is active.

Use on board

This is a sensible fit for center consoles, trailer boats, small cruisers, and other 12V boats that depend on one battery for both starting and accessory loads. It also suits service vehicles running a single 12V battery where holding enough reserve for restart matters.

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.

Deliveries are handled by preferred carriers such as USPS, UPS, FedEx, DHL, and others depending on your location and selected service. Estimated delivery times are displayed at checkout and may vary due to customs processing, carrier delays, weather, postal disruptions, or other circumstances beyond our control. Once your order ships, you'll receive a confirmation email with tracking information. Tracking may take up to 24 hours to update on the carrier's website and is also available through your account when applicable.

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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