Product Overview; Product Description - SMA SUNNY BOY 3.8-US Instructions D'installation

4 Product Overview

4 Product Overview
4.1

Product Description

The Sunny Boy Storage uses the connected battery for the intermediate storage of excess PV
energy in the SMA Flexible Storage System. For this purpose, the Sunny Boy Storage receives the
feed-in data and purchased electricity data from the energy meter. This data is used by the
Sunny Boy Storage to control the charging and discharging of the battery.
The use of an automatic transfer switch is required in the battery-backup system. In the event of grid
failure, the automatic transfer switch disconnects the PV system, loads and the Sunny Boy Storage
from the utility grid and creates a battery-backup grid. The battery-backup grid supplies loads that
should continue to be supplied with electricity in the event of grid failure. In the event of grid failure,
the Sunny Boy Storage supplies the loads with energy after a short switching time. The PV system
supplies additional energy that can be used to supply the loads and charge the battery.
Secure power supply operation in Flexible Storage Systems with backup
power supply not possible
If the inverter is used in a battery-backup system and connected with an automatic transfer
switch, the secure power supply operation is not available.
A
D
Figure 2 : Design of the inverter
Position
A
B
C
D
14 SBSxx-US-10-IA-xx-11
B
C
Designation
Power Unit
Enclosure lid of the Power Unit
Enclosure lid for the Connection Unit
Connection Unit
SMA Solar Technology America LLC
G
Installation Manual
E
F