Victron Energy Lithium NG LiFePO4 Battery, 51.2V, 100Ah, IP65

Overview

The Victron Energy BAT548110620 is a 51.2 V, 100 Ah Lithium NG LiFePO4 battery for 48 V DC energy storage systems on boats. It stores 5120 Wh of nominal energy at 25 °C and is built for installations that need a high-capacity lithium bank with integrated cell and battery monitoring through a compatible Victron NG BMS.

This battery suits larger DC house banks, inverter systems, solar charging setups, and electric loads where a conventional lead-acid bank would take up too much space or weight. It supports 100 A continuous charge and discharge current, has 92 percent round trip efficiency, and carries an IP65 protection class for compartments where moisture and spray are part of normal marine life.

An external Victron NG BMS is required. The battery communicates cell voltages, cell temperatures, and battery current to the BMS, allowing the system to monitor and control charging and loads through VictronConnect, a GX device, and the VRM Portal when the rest of the system is configured for it.

Key features

• 51.2 V nominal LiFePO4 battery with 100 Ah capacity and 5120 Wh nominal energy for 48 V DC banks.
• 100 A continuous charge and discharge rating supports substantial inverter and DC load use when the system is correctly sized.
• Integrated shunt and cell monitoring send battery current, cell voltage, and temperature data to a compatible Victron NG BMS.
• IP65 protection class helps the enclosure handle damp marine compartments and routine exposure to spray or washdown conditions.
• Cycle life is rated at 2500 cycles at 80 percent depth of discharge, 3000 cycles at 70 percent, and 5000 cycles at 50 percent.
• M8 power connections and a 50 cm BMS interface cable with M8 circular connector support a clean installation in a properly planned battery compartment.
• Mounting can be done with straps or brackets, and the battery may be installed upright or on its side when the terminals are not facing down.
• Battery firmware updates are handled automatically by the connected BMS, reducing service steps after installation.

Installation and setup

This battery should be installed as part of a complete Victron Lithium NG system, not as a drop-in standalone battery. It must be paired with a compatible NG BMS, with chargers, alternator regulation, inverter-chargers, fusing, cabling, and disconnects sized for the vessel and the expected load profile.

The enclosure measures 235 x 648 x 162 mm and weighs about 37 kg, so the mounting surface needs to support the battery securely in normal vessel motion. Use the M8 threaded inserts and bolts for the main power connections, and route the BMS communication cable where it will not be strained, crushed, or exposed to chafe.

Electrical and system integration

The recommended charge voltage range is 56 V to 56.8 V, with a 54 V float voltage. Maximum continuous charge current is 100 A, and maximum pulse charge current is 200 A for 10 seconds, so charging sources should be configured to stay within the battery and BMS limits.

For monitoring, Bluetooth is handled through the BMS rather than the battery by itself. In a full Victron system, that makes the battery easier to integrate with a GX display or remote VRM monitoring for owners who want to keep an eye on state, alarms, and system behavior from the helm, cabin, or shore.

Use cases on board

This battery is a strong match for cruising boats, catamarans, and workboats moving toward a 48 V house or inverter bank with solar, alternator charging, and higher DC demand. It also makes sense for vessels where space and weight matter, but the electrical system still needs careful engineering rather than a simple battery swap.

It is best suited to owners, installers, and refit projects already building around Victron NG lithium components. For saltwater boats, the IP65 enclosure is helpful, but the battery should still be mounted in a protected battery compartment with sound ventilation, secure hold-downs, and clean cable support.

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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