Victron Energy
Battery Protect | Victron | BatteryProtect 48V-100A
Product Details
The Victron BatteryProtect 48V-100A is an automatic low-voltage disconnect device designed for 48V battery systems. Rated at 100A continuous, it sits in series between your battery bank and DC loads — protecting your battery from deep discharge by cutting load power the moment voltage drops to a programmable threshold. Once the battery recovers (via solar, mains charger, or alternator), the unit automatically reconnects. Configured via a rotary switch and 7-segment display. Ideal for 48V off-grid solar systems, marine setups, and lithium battery installations.
Key Features
- Automatic low-voltage disconnect — protects battery from over-discharge
- Programmable disconnect and reconnect voltages
- 100A continuous rated / 250A peak
- Alarm output with 12-second pre-disconnect warning
- Remote on/off input for system integration
- 90-second delayed disconnect prevents nuisance trips on short voltage dips
- Solid-state MOSFET switching — no relays, ignition-proof, silent operation
- Ultra-low self-consumption — 1.5 mA in normal operation
Technical Specifications
| Specification | Value |
|---|---|
| Max Continuous Current | 100A |
| Peak Current (30s) | 250A |
| System Voltage | 48V |
| Input Voltage Range | 24-64V |
| Disconnect Voltage Range | Programmable 40–58V |
| Reconnect Voltage Range | Programmable 44–62V |
| Self-consumption | 2 mA |
| Bluetooth | Not included |
| IP Rating (Electronics) | IP67 (fully potted) |
| Dimensions (L x W x H) | 62 x 123 x 120 mm |
| Weight | 0.8 kg |
How It Works
The BatteryProtect installs in series between the battery and your DC loads — important: it protects loads only, never in the charge circuit or starter motor line. When battery voltage falls to the set disconnect threshold, the alarm output activates for 12 seconds as a warning before loads are cut after a 90-second delay. This delay prevents false trips from short-duration voltage sags under heavy starting loads. Once the charger (solar, alternator, or mains) raises the battery voltage back above the reconnect threshold, loads are automatically restored after a 30-second delay. MOSFET solid-state switching means no audible relay click, no arcing, and the unit is ignition-proof — suitable for fuel-present environments.
Use Cases
In 48V off-grid solar systems, the BatteryProtect ensures your inverter, lighting, and DC loads cannot flatten the battery bank overnight. When solar generation resumes at dawn and the bank voltage recovers, all loads reconnect automatically — no manual intervention required. Pairs well with Victron MPPT chargers and GX monitors.
On 48V marine and commercial vessels, the BatteryProtect provides a reliable last line of defence for the house battery bank. Critical navigation equipment, bilge pumps, and communications remain protected from accidental deep discharge even when the vessel is unattended at anchor.
Why Buy From Revolution Power
Revolution Power is a Queensland-based Victron Energy specialist supplying caravanners, boaties, and off-grid installers across Australia. We stock the full BatteryProtect range from our Coomera, QLD warehouse and ship fast Australia-wide. Not sure which rating you need? The amp rating of your BatteryProtect must exceed the total combined current draw of all connected loads. Our team is happy to help with sizing — contact us before ordering if you're unsure.