Blue Sea Systems BatteryLink Battery Charger, 2 Bank, 12V, Integrated ACR

Overview

The Blue Sea Systems BatteryLink Charger is a 12V DC, two-bank marine battery charger range for boats that need charging at the dock and charge sharing while underway. It combines a multistage AC battery charger with an integrated Automatic Charging Relay, so two isolated battery banks can be charged from shore power and the alternator can help charge both the Start and Auxiliary batteries away from the dock.

This North America version uses a NEMA 5-15P plug for standard shore power connections and supports AGM, flooded, and TPPL battery types. Both amperage options use 1 negative and 2 positive output connections, a typical 13.5V DC float voltage, battery temperature compensation, start isolation for sensitive electronics, and an LED remote indicator for charge status at the helm.

The range is built for real marine electrical layouts where battery banks need to stay isolated during normal use but still receive charge from available sources. It fits well on cruising boats, fishing boats, and small workboats with separate starting and house or auxiliary battery banks.

Key features

• Charges two isolated 12V battery banks from AC shore power using a 3-stage charging profile.
• Shares alternator charging with both Start and Auxiliary batteries through the integrated ACR when away from the dock.
• Available in 10A and 20A charging configurations to match different battery bank sizes and onboard loads.
• Battery temperature compensation adjusts charging behavior as battery temperature changes, helping reduce overcharging and undercharging risk.
• Start isolation helps protect sensitive onboard electronics from voltage sags and spikes during engine starting.
• North American NEMA 5-15P plug and 50/60 Hz AC input support for dockside charging.
• Compatible with AGM, flooded, and TPPL batteries.
• IP67 rating, ignition protection, and compliance with ABYC A-31, ISO 8846, SAE J1171, UL 1236, CSA C22.2 No. 107.2-01, and FCC Part 15 Subpart B.

Variants

This BatteryLink Charger is offered in two amperage configurations for North American installations.

The main differences are charging output and ACR rating. Both versions are 12V DC two-bank chargers with shore power charging, alternator charge sharing, temperature compensation, start isolation, an LED remote indicator, and a North American plug.

• 7605: 10A amperage. This version uses a 10A multistage charger with a 65A continuous ACR, making it a practical fit for smaller two-bank systems with start and auxiliary batteries.
• 7608: 20A amperage. This version uses a 20A multistage charger with a 170A continuous ACR and adds remote emergency parallel for combining batteries if the start battery is low.

Electrical and system integration

The charger is meant for 12V DC battery systems with separate Start and Auxiliary banks. At the dock, shore power charges the banks through the onboard AC charger. Underway, the ACR shares alternator charge with both banks while still supporting battery isolation when charging voltage is not present.

The 10A version uses a universal 90-265V AC input, while the 20A version uses a 100-240V AC input. Both operate at 50/60 Hz and use a typical float voltage of 13.5V DC. The 20A version also lists a typical absorption voltage of 14.4V DC.

Installation and fit

The unit should be installed as part of a properly protected marine battery charging system, with cable size, terminal torque, battery capacity, and overcurrent protection matched to the selected model. The 10A version uses 1/4-inch-20 terminal studs with 60 in-lb torque, while the 20A version uses a 1/4-inch negative terminal stud at 60 in-lb and 3/8-inch positive terminal studs at 140 in-lb.

For battery sizing, the 10A version is listed for 60Ah minimum and 120Ah maximum battery bank sizes. The 20A version is listed for 100Ah minimum per bank and 400Ah maximum total capacity across both banks. These limits make the amperage choice important when replacing an existing charger or planning a new two-bank system.

Use cases on board

This charger range suits boats that spend time both at the dock and underway, especially where a start battery and a house or auxiliary battery need managed charging without tying the banks together all the time. It is a strong match for helm-accessible charge status monitoring, weekend cruising, fishing electronics, cabin loads, and small vessel battery systems that benefit from automatic charge sharing.

What's included

• Submersible temperature sensor

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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