Victron SmartShunt 300A / 50mV Battery Monitor (SHU050130050)

The Victron SmartShunt 300A (SHU050130050) is a professional-grade, all-in-one battery monitor designed for users who demand precision without the clutter of a dedicated dash display. Engineered for off-grid solar installations, marine electrical systems, and high-end campervan builds, this compact device acts as the “fuel gauge” for your battery bank. Backed by a 5-year warranty, the SmartShunt delivers laboratory-grade accuracy for lithium (LiFePO4), AGM, and Lead-Acid systems, ensuring you never run out of power unexpectedly.

Understanding Capacity vs. Load: The 300A Advantage

When choosing a monitor, it is vital to distinguish between Amps (current) and Amp-hours (capacity). The SmartShunt 300A is rated for a continuous current flow of up to 300 Amps. This makes it the perfect fit for systems where the total simultaneous draw—from your inverter, lighting, pumps, and appliances—does not exceed 300A.

Crucially, this rating is independent of your battery bank’s size; whether you have a 100Ah, 300Ah, or even a 1000Ah battery bank, the SmartShunt 300A will accurately track your energy reserves as long as your peak loads stay within the 300A limit. It is the gold standard for medium-to-large off-grid systems requiring high-performance current sensing.

Why You Need a SmartShunt (Even with a Bluetooth BMS)

Many modern lithium (LiFePO4) batteries come with an “after-market” integrated Bluetooth BMS. While convenient, these built-in monitors often lack the sensitivity required for true energy management.

• The “Invisible Load” Problem: Most cheaper internal BMS units fail to register small parasitic loads under 2 Amps—such as standby LEDs, USB chargers, or gas detectors. Over several days, these “invisible” drains can lead to a highly inaccurate State of Charge (SOC).
• Superior Sensitivity: The Victron SmartShunt is engineered to detect even the tiniest currents. By capturing every milliamp entering or leaving the battery, it provides the most accurate SOC tracking available on the market, ensuring your readings remain synchronized and reliable over the long term.

With the SmartShunt 300A now being more affordable than ever, it is a low-cost insurance policy for your expensive battery bank, providing a “single source of truth” for your power system.

Wireless Precision with Bluetooth Smart Integration

The SmartShunt 300A features built-in Bluetooth, allowing you to transform your smartphone, tablet, or laptop into a powerful diagnostic tool. Using the VictronConnect app, you can wirelessly monitor State of Charge (SoC), voltage, current (Amps), and power consumption (Watts) in real-time.

Intelligent Energy Management & VRM Compatibility

For users with a fully integrated Energy Storage System (ESS), the SmartShunt connects via a VE.Direct cable to Victron’s GX devices (such as the Cerbo GX). This enables seamless integration into the Victron Remote Management (VRM) portal, giving you the ability to track historical usage data and monitor battery health remotely from anywhere in the world.

Versatile Use Cases: From Marine to Mobile Off-Grid

The Ultimate “Fuel Gauge” for Campervans & Motorhomes

Space is at a premium in van conversions. The SmartShunt’s compact footprint allows it to be installed directly in the battery compartment, eliminating the need to cut holes in your furniture. It provides critical data on time remaining under current load, helping you manage your power while running 12V fridges, induction hobs, or diesel heaters.

High-Precision Monitoring for Canal Boats & Marine Vessels

In harsh marine environments, reliability is non-negotiable. The SmartShunt 300A features an IP21 rating and is built to withstand the rigors of life on the water. It is particularly effective for monitoring auxiliary battery banks on narrowboats and yachts. With the auxiliary input, you can also monitor the voltage of a second battery (starter battery) or track the temperature of your main bank.

Key Features & Technical Specifications

• High-Precision 300A Shunt: Laboratory-grade 50mV sensitivity for micro-accurate readings.
• Eliminates SOC Drift: Accurate tracking of low-current draws that internal BMS units miss.
• Multi-Battery Support: Ideal for LiFePO4 (Lithium), AGM, Gel, and flooded lead-acid batteries.
• Smart Auxiliary Input: Monitor midpoint voltage, starter battery voltage, or battery temperature.
• Plug-and-Play Installation: Simply connect to the battery negative terminal—no complex wiring or external power needed.

Enhance your off-grid power system with the Victron SmartShunt 300A—the smart, compact, and most accurate choice for modern battery monitoring.