Victron Energy Smart BMS Battery Management System, For LiFePO4 Smart Batteries, 12V, Alternator Input

Overview

The Victron Energy Smart BMS is a 12V battery management system range for Victron Lithium Battery Smart 12.8V LiFePO4 batteries in boat installations with a 12V alternator. It monitors individual battery cells and can disconnect alternator charging, charge sources, or DC loads when cell voltage or temperature moves outside safe limits. Both configurations support up to 20 batteries in one 12V system, with a maximum listed storage capacity of 84 kWh.

On a vessel, this unit sits between the lithium service battery bank, starter battery, alternator, chargers, and DC loads, helping the electrical system behave predictably during engine charging, dockside charging, and heavy load use. Bluetooth monitoring and configuration through VictronConnect, a remote on/off terminal, load and charge disconnect outputs, and a pre-alarm output make it practical for installations where the BMS may be mounted in a battery locker, technical space, or under a berth.

Key features

• For 12V Victron Lithium Battery Smart 12.8V LiFePO4 banks used with a 12V alternator.
• Monitors each battery cell and can disconnect alternator charging, charge sources, or DC loads for low cell voltage, high cell voltage, or high temperature.
• Dedicated alternator connection gives current limiting and one-way current flow from alternator to lithium battery.
• Bluetooth supports monitoring and configuration in VictronConnect, with Instant Readout available for key values without opening the BMS connection.
• Remote on/off terminal allows system control from a switch position away from the battery compartment.
• Pre-alarm output can drive a relay, LED, or buzzer before the BMS disconnects the battery bank.
• IP65 electronics protection and a -40 °C to +60 °C operating range support use in protected marine electrical spaces.
• M8 DC power connections and a 6.3 mm Faston battery-minus connector support high-current DC wiring layouts.

Variants

This product family is offered in two amperage configurations. The 100A model is the Smart BMS CL 12-100, while the 200A model is the Smart BMS 12-200.

Both variants are built around the same 12V Victron lithium BMS role, with cell monitoring, alternator current limiting, Bluetooth, remote on/off, load and charge disconnect outputs, pre-alarm output, IP65 electronics protection, and the same listed operating temperature range. The main choice is the current capacity and the way the higher-current 12-200 adds a System+ power port for loads and additional chargers.

• BMS110022000, 100A: Smart BMS CL 12-100. This configuration has a 100A alternator port maximum charge current when fitted with a 125A fuse, and its enclosure measures 65 x 120 x 224 mm.
• BMS210055000, 200A: Smart BMS 12-200. This configuration adds a System+ power port with 200A maximum continuous charge and discharge current, 400A peak discharge current, and an enclosure size of 65 x 120 x 340 mm.

Electrical and system integration

The alternator input is electronically limited to about 90% of the installed fuse rating, so fuse selection is part of setting the alternator charge current. With a 100A fuse, the input current is limited to about 90A; with the 125A fuse used for the rated alternator port maximum, the system reaches the 100A class shown for these models.

The load and charge disconnect outputs are low-current control outputs for external equipment such as BatteryProtect units, chargers, relays, indicators, or control circuits. The pre-alarm output is normally free-floating and goes high in case of alarm, with a 1A maximum rating, so it is useful for a helm or electrical-panel warning circuit before battery protection shuts the system down.

Installation and fit

Mount the BMS where the electronics stay protected from direct bilge water while still allowing short cable runs to the battery bank, starter battery, alternator feed, and DC distribution. The IP65 electronics rating helps with dust and spray exposure in sheltered locations, but the unit should still be installed as part of a properly fused DC system with marine cable sizes matched to the expected current.

The 100A unit weighs 1.6 kg, and the 200A unit weighs 2 kg. The 200A model is longer because of its higher-current System+ layout, so check available battery-compartment or electrical-panel space before selecting the variant.

Use cases on board

This BMS range suits lithium service-bank installations on cruising boats, fishing boats, workboats, and refit projects where a 12V alternator, starter battery, and Victron Lithium Battery Smart bank need coordinated protection. It is especially relevant where the crew wants app-based monitoring, remote system shutoff, and an early warning output at the helm or electrical panel.

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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