User and Installation Manual - Cyclone wind turbines

Wiring options – Island grid battery charging configuration
The Idea The Sunny Island is connected to a battery bank and defines the AC grid by controlling voltage and frequency on
the AC side. All components of your off‐grid system are connected to this AC bus. These can be electricity consumers as well
as well as electricity sources (such as Sunny Boy PV‐inverters). In periods with a high energy yield (e.g. daytime with high
insolaration and low electricity demand on the consumer side) the Sunny Island extracts AC power from the bus and charges
the battery. In periods with high electricity demand (e.g. night time and higher electricity demand on the consumer side)
the Sunny Island takes energy out of the battery and feeds it to the AC bus.
Flexible Nearly any kind of electricity generator can be integrated into your Sunny Island off‐grid electricity supply:
Photovoltaic plants with Sunny Boy inverters, wind energy plants with Windy Boy inverters from SMA, water turbines and
even diesel generators that are automatically activated when the state of charge of the connected batteries run low. Off‐grid
electricity supply systems based on Sunny Island can easily be extended and modified due to its stackability.
Powerful Off‐grid systems with Sunny Islands are powerful for two reasons: The coupling of the components on the AC side
results in an adding up of all energy sources. A high solar radiation results in a high output of your Sunny Boy inverters while
this energy is additionally available to the power your Sunny Island can deliver. This increases the total power of your plant.