SMA Backup 1P - Single-phase Box Backup IP65 Sunny Boy
The SMA Backup 1P BU-SBSE-1P-50 is the external box for automatic single-phase backup with the hybrid inverter Sunny Boy Smart Energy. In the event of a blackout, it automatically switches to off-grid mode, powering all single-phase loads up to 63 A and 7,300 W. IP65 protection, standby consumption less than 1 W, flexible wall mounting for new installations and retrofits.
The SMA Backup 1P BU-SBSE-1P-50 is the external automatic single-phase backup box for photovoltaic systems with Sunny Boy Smart Energy inverters. In the event of a blackout, it automatically switches to off-grid mode, powering all single-phase loads up to 63 A. IP65 protection, standby consumption less than 1 W, flexible wall mounting.
Technical Specifications
| Phase | Single-phase |
| Max load current | 63 A |
| Backup power | 7,300 W |
| Protection rating | IP65 |
| Standby consumption | less than 1 W |
| Switching time | 0-600 s configurable |
| Compatible grid | TN-C-S |
| Dimensions W x H x D | 506 x 260 x 236 mm |
| Weight | 6.16 kg |
| Compatible inverters | Sunny Boy Smart Energy SBSE 3.6 / 4.0 / 5.0 / 6.0-50 |
Frequently Asked Questions
Does the SMA Backup 1P work at night or under cloudy skies?
Yes. In the event of a blackout, it powers the loads using energy from the SMA Home Storage battery, regardless of photovoltaic production. The autonomy depends on the battery capacity and the active consumption.
Does it power the whole house or only certain circuits?
It powers all single-phase loads up to 63 A and 7,300 W, without a separate backup panel. It is installed upstream of the main panel and ensures continuity for the entire single-phase supply.
How long does it take to switch over in case of a blackout?
The switching time is configurable from 0 to 600 seconds. In typical configuration, the switchover is almost instantaneous, sufficient for computers, NAS, and heating systems.
Can the BU-SBSE-1P-50 be installed outdoors?
Yes. The IP65 protection makes it suitable for both indoor and outdoor environments. Flexible wall mounting is also ideal for upgrading existing systems.
Are GSE procedures required to install the SMA Backup 1P?
Yes. Adding the backup function requires notification to the GSE and the local distributor. The SMA installer handles the documentation, including the declaration of conformity and notification of the EPS function added to the system.
