Battery Protection

Reliable Battery Protection & Low Voltage Disconnects

Safeguard your off-grid power system with our comprehensive range of battery protection devices. Whether you are running a 12V canopy setup in your 4WD, a complex 48V tiny home system, or powering a marine vessel, a reliable low voltage disconnect is an essential line of defence. These devices automatically disconnect non-critical loads before your deep cycle batteries are completely drained, preventing irreversible cell damage and ensuring you always have enough power to start your engine or run essential systems.

Why You Need a 12V Low Voltage Cutoff

A battery cut off switch serves as an automatic safety net for your energy storage. While modern lithium batteries feature an internal Battery Management System (BMS), a dedicated 12V low voltage cutoff acts as an ideal primary defence to shut down heavy loads before the BMS goes into a hard lockout. For AGM, Gel, and Lead-Carbon batteries, an automatic low voltage cutout is critical, as discharging these chemistries too deeply significantly reduces their overall lifespan.

Victron & Enerdrive Battery Cut Off Switches

We stock highly reliable battery protection relays from trusted industry leaders, including Victron Energy and Enerdrive. Our selection spans multiple voltages, including 12V, 24V, and 48V, and a wide range of current ratings from 40A up to 220A to suit diverse system sizes.

Key features across our range include:

• Solid-State Switching: Products like the Victron BatteryProtect use MOSFET switches instead of traditional mechanical relays, ensuring zero voltage drop and eliminating the risk of sparking.
• Smart Bluetooth Programming: Opt for a Victron Smart BatteryProtect to easily set connect and disconnect voltage thresholds directly from your smartphone.
• Over-Voltage Protection: Many low voltage battery disconnect units also protect sensitive appliances by shutting down loads if the system voltage spikes dangerously high.
• System Integration: Easily wire these units alongside battery monitors and isolation switches for a complete power management solution.

How to choose guidance: Battery Protection

Selecting the correct low voltage disconnect requires matching the device to your specific electrical architecture and expected loads. Consider these criteria before purchase:

• System Voltage: Ensure the unit matches your battery bank. Most 12V and 24V low voltage cut off switches are auto-detecting, while 48V systems require dedicated models.
• Continuous Current Rating: Calculate the maximum continuous draw of the appliances connected to the load side of the switch. Choose a model, such as a 65A, 100A, or 220A unit, that comfortably exceeds your peak continuous load to prevent overheating.
• Smart vs. Standard: If you frequently adjust your system parameters or want detailed visibility, a Bluetooth-enabled smart cut off switch is highly recommended. Standard units use physical pin programming which is robust but less flexible.
• Unidirectional vs. Bidirectional: Most standard battery protection relays are unidirectional, meaning current can only flow from the battery to the loads. If you need to route charge current backwards, verify the specific model supports bidirectional flow.

As an Australian family business with over a decade of experience in off-grid power, we are committed to providing high quality products and expert before and after support. Browse our range of ultra durable low voltage disconnects below and secure your battery investment with fast dispatch today.