SMA Backup Box (4-pole, 63A) - BU-STPH-4P63B
€ 719,27 exkl. USt.
SMA Backup Box (4-pole, 63A) - BU-STPH-4P63B is backordered and will ship as soon as it is back in stock.
Advantages at a glance
Automatic backup power supply
In the event of a power outage, the SMA Backup Box automatically switches the household distribution to the inverter, continuing to supply power to consumers.
63 A per phase
4-pole transfer mechanism with 63 A rated current per phase for three-phase backup power supply in single and multi-family homes.
Switching of the entire house grid
Four poles safely switch all three live conductors and the neutral conductor between the public grid and island operation.
Safe grid disconnection
Clear galvanic isolation from the public grid in backup power mode protects the system and service personnel.
Compact wall-mounted device
Pre-assembled box for easy wall mounting in the house connection room – quick integration without complex control cabinet construction.
Quality from SMA
System component from the established inverter manufacturer SMA with many years of experience in backup power solutions.
Technical data
| Parameter | Value |
|---|---|
| Manufacturer | SMA |
| Product type | Backup Box (Backup Power Transfer Box) |
| Version | 4-pole |
| Rated current | 63 A per phase |
| Phases | Three-phase (3~) |
| Mounting | Wall mounting |
| Manufacturer part number | BU-STPH-4P63B |
Frequently Asked Questions
What is the SMA Backup Box (4P, 63A)?
The SMA Backup Box is an automatic transfer unit for backup power supply. In the event of a public grid failure, it disconnects the household distribution from the grid and switches to the inverter, so that connected consumers continue to be supplied with power. The 4P/63A version switches four-pole with 63 A rated current per phase.
Which systems is the Backup Box suitable for?
The box is designed for three-phase backup power solutions in single and multi-family homes. With 63 A per phase, it covers typical household connections and enables continued supply to the house grid via the compatible SMA inverter in the event of a power outage.
How does the switching work in the event of a power outage?
If the public grid fails, the 4-pole box disconnects all three live conductors and the neutral conductor from the grid, establishing galvanic isolation. The inverter then builds its own island grid. When the grid returns, it automatically switches back.
Does the Backup Box have to be installed by a specialist company?
Yes. As a component of the house distribution, the box is integrated into the meter area or the sub-distribution and must be installed and connected by a licensed electrician in accordance with applicable regulations.
Who is SMA?
SMA is an established manufacturer of inverters and system solutions for photovoltaics. In addition to inverters, the company also offers accessories such as backup power transfer boxes for a reliable emergency power supply.
Where can I buy the SMA Backup Box in Austria?
The SMA Backup Box (4P, 63A) is available from SOLARVIC and can be ordered directly online via solarvic.at. The SOLARVIC team will be happy to advise you on design questions.
How can I order?
Directly online via solarvic.at – the SOLARVIC team will be happy to assist with any design questions.
€ 719,27 exkl. USt.
SMA Backup Box (4-pole, 63A) - BU-STPH-4P63B is backordered and will ship as soon as it is back in stock.