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title: "Buy SMA Backup Box 3P? Check stock!"
description: "Buy the SMA Backup Box 3P external wall housing (63A) at ESTG. IP65 protection for indoor and outdoor use. Check stock and order directly online!"

type: product_page

---

# SMA Backup Box 3P - External Wall Housing - 63A - For Sunny Tripower Hybrid X - Art.No.: BU-STPH-3P63B

## Specifications

- **Brand**: SMA
- **HS code**: 85371098
- **Manufactor**: SMA
- **Net Height**: 260 MILLIMETER
- **Net Length**: 236 MILLIMETER
- **Net Weight**: 5.5 KILOGRAM
- **Net Width**: 506 MILLIMETER
- **Origin**: Germany
- **Number of phases**: 3 phase
- **System**: SMA Home Storage, SMA Storage M, SMA Sunny Tripower Hybrid X
- **Warranty in Years**: 2

## SMA Backup Box 3P - External Wall Housing - 63A


This automatic changeover device ensures a reliable switch between grid-connected and off-grid operation. In the event of a grid failure, the system safely disconnects the building from the utility grid and takes over the power supply for the connected loads.



## Advantages of the SMA Backup Box 3P - External Wall Housing


- **safety**: full protection of all loads in the household up to a continuous current of 63 A
- **efficiency**: works without self-consumption during normal grid operation and consumes only a maximum of 4 W in backup mode
- **mounting**: delivered as a separate enclosure with a wall mounting bracket, which allows for flexible installation both indoors and outdoors thanks to the IP65 protection degree
- **certainty**: equipped with black start capability for a controlled restart during prolonged grid failures
- **flexibility**: possibility to set and configure a specific backup reserve



## Part of the residential and light commercial platform


This product is part of SMA's residential and light commercial platform. The box can be used universally within various system concepts and is fully compatible with the complete **three-phase Sunny Tripower Hybrid X series**. This includes both the lighter models for **households (Platform 60)** and the heavier versions for **small business applications (Platform 70)**. This allows you to flexibly integrate the module into both new and existing installations. Check the current stock status and order directly online.

## Downloads

- [SMA Backup STPH Datasheet](https://cdn.estg.eu/p/d/7/6/e/d76e3fff67a365060588c501653712a8aeba3e44_SMA_Backup_STPH_Datasheet.pdf)