PV Inverters in Stand-alone Grid Systems SMA Solar Technology AG
140 SI5048-TB-TEN110340 Technical Description
17 PV Inverters in Stand-alone Grid Systems
You will find further information on "selecting and using PV inverters in stand-alone grid and back-up
systems" in the download area at www.SMA.de/en.
To operate the a PV inverter in a Sunny Island system, you must set the PV inverter parameter to stand-
alone grid operation.
Depending on the device type, you can set the PV inverter to "stand-alone grid operation" using
Sunny Boy Control, Sunny WebBox, Sunny Data Control or Sunny Explorer.
17.1 Setting Stand-alone Grid Operation
If the PV inverter is not set ex works, you must set the PV inverter to stand-alone grid operation at the
installation location.
You have several possibilities to set the PV inverter to stand-alone grid operation:
• Setting via rotary switch (only within the first 10 operating hours)
• Setting via Sunny Boy Control, Sunny WebBox
•Setting via Sunny Data Control
You can only carry out the setting via the rotary switch on the PV inverter within the first 10 operating
hours. Thereafter you must carry out the setting via Sunny Boy Control or Sunny Data Control.
Changing grid-relevant parameters
To change grid-relevant parameters on the PV inverter (Sunny Boy, Sunny Mini Central or
Sunny Tripower) you need a personal access authorization, the SMA Grid Guard
password. Call the SMA Serviceline to obtain your personal SMA Grid Guard password.
DANGER!
Feedback may occur if the power distribution grid fails. Death or serious burns
when working on the power distribution grid.
If you set the PV inverter to stand-alone grid operation, it does not fulfill any country-specific
standards and regulations. Therefore, in the event of outage of the power distribution grid,
there is a danger of back feed.
• Never operate the PV inverter directly on the power distribution grid when set to
stand-alone grid operation.
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