Victron Energy VE.Bus BMS Battery Management System, For Victron LiFePO4 Batteries, 12-48VDC

Overview

The Victron Energy BMS300200000 is a VE.Bus battery management system for Victron LiFePO4 and LFP battery banks on 12V, 24V and 48V DC marine power systems. It operates across a 9 to 70V DC input range and protects individual lithium cells against over-voltage, under-voltage and over-temperature conditions.

This unit is used with Victron lithium batteries that have integrated Balancing, Temperature and Voltage control, often referred to as BTV. The BTV connections from multiple batteries can be daisy-chained, allowing the BMS to supervise the battery bank and send control signals when the bank needs loads reduced, charging limited or chargers disconnected.

For boats using VE.Bus equipment, the BMS links to MultiPlus, Quattro or Phoenix inverter products through a standard RJ45 UTP cable. It also gives installers Load Disconnect, Charge Disconnect and Pre-alarm outputs for controlling supporting equipment in a safer lithium setup.

Key features

• Protects each individual cell in a Victron LiFePO4 or LFP battery against over-voltage, under-voltage and over-temperature conditions.
• Works in 12V, 24V and 48V DC systems, with a BMS input voltage range of 9 to 70V DC.
• Connects to MultiPlus, Quattro or Phoenix inverter products through a standard RJ45 UTP VE.Bus cable.
• Uses Load Disconnect, Charge Disconnect and Pre-alarm outputs to manage loads, chargers and warning devices during battery fault conditions.
• Supports daisy-chained BTV battery connections for multi-battery Victron LiFePO4 banks.
• Load Disconnect output has a 2A source current limit, while the Charge Disconnect output has a 10mA source current limit.
• Pre-alarm output can trigger a warning before load disconnect, with a minimum 30 second delay between pre-alarm and load disconnect.
• IP20 housing for installation inside a protected electrical area, with an operating temperature range from -20°C to +50°C.
• ABS enclosure measures 105 x 78 x 32 mm and weighs about 0.1 kg.

Compatibility and fit

The VE.Bus BMS is for Victron LiFePO4 battery systems that use BTV connections. It is not a generic drop-in BMS for unrelated lithium batteries, so the battery type and Victron BTV cabling should be confirmed before installation.

The battery BTV leads can be daisy-chained across several batteries. The system supports arrangements with up to five batteries in parallel and up to four batteries in series, which covers typical 12V, 24V and 48V house-bank layouts when the battery bank is configured within the proper lithium system limits.

VE.Bus communication is handled through two RJ45 sockets, making the unit a natural fit for boats with Victron inverter or inverter/charger equipment already in the electrical system. Non-VE.Bus loads and charge sources can be controlled through the appropriate disconnect terminals rather than through VE.Bus communication.

Installation and setup

Mount this BMS in a dry and protected electrical space, such as an electronics locker, battery control area or distribution panel compartment. The IP20 protection grade and 95% maximum non-condensing humidity rating mean it should not be installed where it can be exposed to deck wash, bilge splash or dripping water.

The Load Disconnect output is normally high and becomes free-floating when cell under-voltage is imminent. The Charge Disconnect output is normally high and becomes free-floating when cell over-voltage or over-temperature is detected. The Pre-alarm output is normally free-floating and becomes high during an imminent cell under-voltage alarm, allowing a light, buzzer or relay to warn the crew before loads are disconnected.

Keep the BTV, RJ45 UTP and disconnect wiring accessible and well supported. On a boat, clean routing and strain relief matter because battery spaces and electrical lockers see movement, service work and seasonal maintenance.

Use cases on board

This BMS is a practical match for cruising boats, fishing boats and sailboats using Victron lithium batteries with a VE.Bus inverter or inverter/charger. It helps coordinate the lithium bank with onboard DC loads, AC inverter loads and charge sources so the system reacts before the cells move outside their safe operating range.

The unit does not carry the main battery current itself. It belongs in a properly planned lithium installation with suitable fusing, cabling, load control and charger control hardware, so the BMS commands the system while the power equipment handles the actual current.

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.