

SMA Backup Start Piggy-back card - Enables Backup Secure feature (1.9kW, 120Vac, manual backup [formerly SPS) *Installer must provide separate switch and electric outlet (SBSE)
The SMA BU-STRT-US-50 Backup Start Module is an accessory installed in compatible SMA Sunny Boy Smart Energy inverters. It enables backup power/Backup Secure operation during a grid outage by allowing the inverter to start using energy from the PV system or battery, even when the inverter has been completely de-energized.
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Description
Specifications:
- Manufacturer Part Number: BU-SLCT-US-50
- Shipping Dimensions: 14 x 23 x 9 in
- Shipping Weight:15.5 lb
Mechanical:
- Operation: Manual backup activation
- Function: Enables SMA Backup Secure / battery-backup operation
- Backup Capability: Can start the inverter when grid power is unavailable
- Application: Residential solar + battery backup systems
- Rapid Shutdown: Required for Backup Secure in installations subject to applicable rapid-shutdown requirements
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Resources
Datasheet
✔️ Download Datasheet
Quick Installation Guide
✔️ Download Installation Guide
Warranty
✔️ Warranty