SMA Solar Technology AG
2 Safety
User Manual
REDUCERBOX-BA-en-16
9
2 Safety
2.1 Intended Use
The Power Reducer Box is for PV plants that have to implement network operator setpoints for active
power limitation and reactive power operation under grid management. The Power Reducer Box
complies with the requirements of the German Renewable Energy Sources Act (EEG) for feed-in
management and the requirements of the medium-voltage directive for grid management set out by
the German Association of Energy and Water Industries (BDEW).
The network operator can use the Power Reducer Box to temporarily and remotely limit the feed-in
capacity of the PV plant in the case of a grid overload. The Power Reducer Box translates the control
commands of the network operator and transmits them to the Sunny WebBox. The Sunny WebBox
forwards the control commands to the inverter.
The Power Reducer Box primarily performs the following tasks:
• Active power limitation and reactive power setpoint
• Recording all control commands of the network operator
• Control of up to 2,500 SMA inverters via Sunny WebBoxes
• Data transfer to the Sunny Portal Internet portal for visualisation and optimal notification to the
plant operator
The Power Reducer Box is designed for indoor use only.
The Power Reducer Box is only to be operated using the supplied plug-in power supply and in the
voltage range intended for this.
The Power Reducer Box must only be used with supported products.
For safety reasons, it is not permitted to modify the product or install components that are not explicitly
recommended or distributed by SMA Solar Technology AG for this product. Only use the
Power Reducer Box in accordance with the information provided in the enclosed documentation.
Any other use may result in personal injury or property damage.
The enclosed documentation is is intregal of this product.
• Read and adhere to the documentation.
• Keep the documentation in a convenient place for future reference.
