Victron Smart BatteryProtect 48V 100A: Setup & Guide

Key Takeaways

• The Smart BatteryProtect SBP 48V 100A is a solid-state DC protection switch that isolates non-essential circuits before deep discharge occurs.
• Provides heavy-duty DC switching: Max. continuous load current 100A Peak current 250A across an Operating voltage range 24 - 70 V.
• Utilizes spark-free technology: Ignition proof: No relays but MOSFET switches, and therefore no sparks.
• Protects sensitive equipment from over-voltage surges: The load is disconnected whenever the DC voltage exceeds 64V.
• Operates with ultra-low standby current draw: BLE On and when on: 1.9mA When off or low voltage shutdown: 1.7mA.
• Incorporates a delayed warning signal: Alarm output delay 12 seconds with Max. load on alarm output 50mA - short circuit proof.
• Pre-programmed with factory presets: Default thresholds Disengage: 42 V Engage: 48 V.
• Engineered for rugged environments with Full load: -40 °C to +40 °C (up to 60% of nominal load at 50 °C).
• Compact, robust form factor: Weight 0.8 kg 1.8 lbs Dimensions (hxwxd) 62 x 123 x 120 mm 2.5 x 4.9 x 4.8 inch.

Solid-State MOSFET Switching & System Role

The Victron Smart BatteryProtect disconnects non-essential DC loads before the battery is fully depleted or when DC voltage exceeds safe operating limits. Unlike mechanical relays or contactors, it uses high-power MOSFET solid-state switches that do not produce electrical arcing sparks or consume continuous coil holding current.

The Victron Smart BatteryProtect 48V 100A is a solid-state DC disconnect switch (100A Continuous, 250A Peak, 24 - 70V DC; Ignition-Proof MOSFET Switching with zero sparks and zero arcing) with intelligent protection stages:

• Battery Protection: 42V Disengage Level, 48V Engage Level, >64V Overvoltage Cut, 1.9mA BLE Draw.
• Alarm & Remote: 12s Alarm Delay, 50mA Alarm Port, Remote H / L Pins, BMS Direct Link.
• Programming: Bluetooth BLE, VictronConnect, 9 Presets, PROG Pin GND.

Electrical Wiring Rules

1. Strict Unidirectional Flow: Always isolate power sources before touching studs. Current must strictly flow from the IN stud (battery bank) to the OUT stud (DC loads). Never connect inverters or inverter/chargers downstream of an SBP, as reverse charging current will destroy the internal MOSFETs.
2. Voltage Operating Range: Operating across Operating voltage range 24 - 70 V, the unit protects against both under-voltage and over-voltage: The load is disconnected whenever the DC voltage exceeds 64V.
3. Low Standby Drain: Preserves battery capacity with minimal current draw: BLE On and when on: 1.9mA When off or low voltage shutdown: 1.7mA.

Bluetooth Programming & Alarm Output

The Smart BatteryProtect is easily configured wirelessly or via external hardware pins:

• Bluetooth Configuration: Using VictronConnect, installers can select from 9 predefined voltage thresholds or set custom disconnect and reconnect levels. Factory defaults are set to Default thresholds Disengage: 42 V Engage: 48 V.
• Delayed Alarm Output: A dedicated short-circuit-proof alarm output (Max. load on alarm output 50mA - short circuit proof) activates after an Alarm output delay 12 seconds, allowing transient voltage dips from motor starts to pass without triggering nuisance alarms.
• BMS Integration: Wiring the Remote H pin to the load disconnect terminal of a VE.Bus BMS or Lynx Smart BMS allows external lithium battery management systems to switch off loads immediately during cell depletion.

Technical Specifications & Environmental Standards