Victron Energy Argofet Battery Isolators, Alternator Energize Input, 12/24V Auto Ranging

Overview

The Victron Energy Argofet is a FET-based battery isolator range for charging separate battery banks from one alternator or a single-output battery charger without linking those banks together. This helps keep a start battery from being pulled down by house or accessory loads, which matters on cruising boats, fishing boats, and other vessels with more than one DC battery bank.

The range covers 100 A and 200 A maximum charge current versions, with configurations for 2 or 3 batteries. All listed versions are auto-ranging for 12V and 24V systems, use M8 bolt connections, measure 65 x 120 x 200 mm, and weigh 1.4 kg.

The FET layout keeps voltage drop very low compared with diode-style isolators: less than 0.02 V at low current and about 0.1 V at higher current. The alternator energize input is useful where an alternator needs DC voltage at B+ before it begins charging.

Key features

• Charges 2 or 3 battery banks from one alternator or single-output battery charger while keeping the banks electrically separated.
• FET-based isolation keeps voltage drop below 0.02 V at low current and around 0.1 V at higher current.
• Auto-ranging 12V and 24V operation suits common marine DC charging systems.
• Alternator energize input can power B+ when the engine run/stop switch is closed, helping alternators that need voltage before charging starts.
• M8 bolt connections give a clear fit point for high-current battery and alternator cabling.
• Shared 65 x 120 x 200 mm size across the range makes panel and locker layout easier to plan.

Variants

This Argofet range is offered in multiple charging and battery-bank configurations. The differences are maximum charge current and the number of battery outputs.

The listed versions share 12V and 24V auto-ranging operation, M8 bolt connections, 65 x 120 x 200 mm dimensions, and 1.4 kg weight. Match the current rating to the alternator or charger output, then match the output count to the number of battery banks that need charging.

• ARG100201020: 100 A maximum charge current with outputs for 2 batteries. This suits a two-bank layout such as start and house batteries when the charging source is within the 100 A rating.
• ARG100301020: 100 A maximum charge current with outputs for 3 batteries. This keeps three separate banks on the same charging source while staying within a 100 A charge current limit.
• ARG200201020: 200 A maximum charge current with outputs for 2 batteries. This version fits two-bank systems using a higher-output alternator or charger within the 200 A rating.
• ARG200301020: 200 A maximum charge current with outputs for 3 batteries. This is the three-bank option for systems that need the 200 A charge current rating.

Installation and setup

Plan the installation around the charging source and the battery bank positives. The alternator or single-output charger connects to the input, and the battery bank positives connect to output 1, output 2, and output 3 on 3-bank versions. Keep charge cables short and sized for the current, because cable loss can still affect charging performance.

The energize blade terminal connects to the engine run/stop switch when that function is needed, and the ground blade terminal connects to the common negative bus bar. Both blade terminal connections call for a minimum cable cross section of 2.5 mm2. Mount the unit on a non-flammable surface and leave enough room around the M8 terminals for secure cable routing and later inspection.

Compatibility and fit

Use the 100 A versions with charging sources up to 100 A and the 200 A versions with charging sources up to 200 A. The 2-battery models suit simple start and house-bank layouts, while the 3-battery models suit boats with an additional separate bank that needs alternator or charger input without being tied directly to the others.

This is a good match for boats that need alternator charging across separate battery banks without using the isolator as a battery switch, charger, or monitor. It belongs in a properly planned DC charging system where cable size, overcurrent protection, mounting surface, and service access are checked before installation.

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.

Learn more.

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.

Learn more.

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.

Learn more.