12V DC Battery Over Discharge Protector

A 12 V battery over-discharge protection module that automatically disconnects your load when battery voltage drops below a set threshold — preventing deep discharge damage to lead-acid and lithium batteries. When the battery recovers above the reconnect threshold, the load is automatically reconnected.

🔹 Key Applications

• 12 V lead-acid battery protection in solar systems
• Caravan and motorhome battery low-voltage cutoff
• Off-grid power system battery protection
• 12 V lithium battery over-discharge prevention
• Backup power system load disconnect
• Deep-cycle battery life extension

🔹 Why Choose This Module?

• Automatic load disconnect on low voltage — prevents battery damage
• Auto-reconnect on voltage recovery — no manual reset needed
• Adjustable disconnect and reconnect thresholds
• Relay output — switches loads up to 10–20 A
• LED status indicator — shows protection state

🔹 Technical Specifications

• Battery Voltage: 12 V DC
• Disconnect Threshold: ~10.8 V (adjustable)
• Reconnect Threshold: ~12.6 V (adjustable)
• Load Output: Relay (10 A+)
• Indicator: LED status

🔹 What's Included

1 × 12V Battery Over-Discharge Protector Module

🔹 Pro Tip

💡 For lead-acid batteries, set the cutoff to 11.5–11.8 V (50% SoC) to maximise cycle life without excessive depth-of-discharge. For 12.8 V LiFePO4 batteries, set cutoff to 11.5 V. Wire the module between the battery positive and your load positive terminal — the relay breaks the positive supply line.

⚠️ Note: Always ensure proper heat dissipation and correct voltage configuration before powering connected devices.