Victron Energy Argodiode 80-2SC Battery Isolator, 2 Batteries, 80A, 12/24V

Overview

The Victron Energy ARG080202000 is an Argo Diode 80-2SC battery isolator for charging two 12V or 24V battery banks from a single alternator while keeping the banks electrically separated. It is rated for 80 A maximum charge current and 80 A maximum alternator current, with M6 stud connections and a 6.3 mm Faston connection for the compensation diode.

This isolator suits boat electrical systems where a starter battery and a house or accessory battery share the same alternator. Both banks can receive charge at the same time, but discharge from the service side will not also drain the starter battery. Schottky diodes keep the voltage drop low, at approximately 0.3 V at low current and approximately 0.45 V at rated output.

Key features

• Charges two battery banks from one alternator while keeping the banks separated from each other.
• Suitable for nominal 12V and 24V battery systems.
• Rated for 80 A maximum charge current and 80 A maximum alternator current.
• Schottky diode design keeps voltage drop to approximately 0.3 V at low current and approximately 0.45 V at rated output.
• Compensation diode connection can be used with alternator voltage sensing to help offset isolator voltage drop.
• M6 stud main terminals support secure high-current DC cable connections.
• Compact housing measures 60 x 120 x 75 mm for installation in tight electrical compartments.
• The 80-2SC model does not include an alternator energize input, so alternators that need B+ excitation should be checked before installation.

Installation and setup

The isolator is installed in the positive charging path between the alternator and the batteries. The alternator positive output connects to the isolator input, and the positive feeds for the two battery banks connect to outputs 1 and 2. The battery negatives should return to a common negative bus.

Before working on the DC system, the battery negative cables should be disconnected. Cable runs should be kept short and sized for the charging current, as voltage drop in long or undersized cable can reduce the charge reaching the batteries. The unit can become hot in service, so it should be mounted only on a non-flammable surface with enough space around it for heat to clear.

Marine use

On a powerboat, sailboat, or fishing boat with a separate engine start bank and house bank, this isolator helps preserve starting reserve while still allowing alternator charging to reach both banks. It is a practical fit for straightforward dual-bank DC systems where the goal is separation rather than battery combining for shared loads.

System protection, battery switching, fusing, and cable sizing should be handled as part of the vessel's overall DC installation. For alternators with external sensing, the compensation connection can help account for the diode voltage drop so the charging system is set up more accurately.

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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.

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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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