Victron Energy Battery Protect 48V-100A

The Victron Energy Smart BatteryProtect 48V-100A is a Bluetooth-enabled battery protection device that automatically disconnects non-essential DC loads before the battery reaches a damaging depth of discharge, while also serving as a programmable system on/off switch.

Designed exclusively for 48V systems with a wide 24–70V operating range, the Smart BatteryProtect 48V-100A safeguards lead-acid and lithium battery banks in off-grid solar, marine, RV, and backup power applications by monitoring battery voltage and executing delayed, configurable load disconnects and reconnects to extend battery life and prevent deep discharge damage.

With its compact form factor, ultra-low current consumption, and ignition-proof MOSFET switching, the Smart BatteryProtect 48V-100A integrates cleanly into a wide range of DC load management and battery protection schemes.

Key Features:

• 100A Continuous Load Protection for 48V Systems — Supports up to 100A continuous load current and 250A peak for 30 seconds, covering the DC load management needs of large 48V off-grid and backup power installations
• Bluetooth Programming via VictronConnect — Full engage and disengage threshold configuration via the VictronConnect app on Apple and Android devices; alternatively, nine predefined engage/disengage levels can be set manually using the programming pin without a smartphone; Bluetooth can be disabled if required
• Li-ion Battery Support with VE.Bus BMS Control — Dedicated Li-ion mode allows the Smart BatteryProtect to be directly controlled by the Victron VE.Bus BMS for integrated lithium battery system management; can also be wired as a charge interrupter between a battery charger and a Li-ion battery
• Delayed Load Disconnect and Reconnect — Load disconnects 90 seconds after battery voltage drops below the preset threshold, preventing nuisance disconnects from brief transient voltage dips; reconnects 30 seconds after voltage recovers above the preset reconnect level; disconnect is immediate if triggered by the VE.Bus BMS
• Delayed Alarm Output — Open collector alarm output activates after battery voltage remains below the disconnect threshold for more than 12 seconds, avoiding false alarms during engine starting; supports buzzers, LEDs, or relays up to 50mA; short circuit proof
• Over-Voltage Load Protection — Automatically disconnects the load if DC voltage exceeds 64V, protecting sensitive connected loads from voltage spikes and overvoltage events on 48V battery systems

The Smart BatteryProtect 48V-100A's MOSFET-based switching architecture eliminates mechanical relays entirely, making it ignition proof with no sparks at the terminals during switching events — an important safety characteristic in marine and RV environments where fuel vapors may be present. Ultra-low current consumption (1.9mA BLE on, 1.7mA at low voltage shutdown) makes this device well-suited for lithium battery systems where parasitic draw after a low-voltage shutdown must be kept to an absolute minimum. Default disconnect and reconnect thresholds are 42V and 48V respectively, with full custom threshold configuration available via VictronConnect.

The 48V-100A model uses M8 terminal connections to accommodate the heavier gauge cabling typical of high-current 48V systems, and includes a connector with a pre-assembled DC negative cable included in the box. It operates across a wide -40°C to +40°C temperature range at full load, with load capacity derated to 60% of nominal at 50°C. The on/off input terminal allows the Smart BatteryProtect to function as a remote-controlled system switch, enabling clean shutdown and startup sequencing when integrated with a battery management system, ignition switch, or remote panel.

Technical Specifications: