Can sunny island inverters be off-grid?
In off-grid operation, the Sunny Island inverters must be able to limit their output power, if PV inverters are connected on the AC side. This situation can occur when, for example, the battery of the Sunny Island is fully charged and the PV power available from the PV system exceeds the power requirement of the connected loads.
Can I use PV inverters in off-grid systems?
You can use the following PV inverters in off-grid systems. You can order all the listed PV inverters with preset off-grid parameters from SMA Solar Technology AG. The PV inverters must be equipped with at least the firmware version given in the table, or a higher version.
Can a PV inverter be set to stand-alone mode?
The PV inverter can be set to stand-alone mode and reduce its feed-in power if this is required by the battery state of charge or the energy demand of the connected loads. To do this, use the integrated frequency-shift power control (FSPC). Selecting the PV Inverter You can use the following PV inverters in off-grid systems.
How much AC power should a sunny island inverter have?
In off-grid systems, the nominal AC power of the PV system must not be more than double the nominal AC power of the Sunny Island inverters. The battery capacity per installed kWp of the PV array must be at least 100 Ah. Example: In a PV array with 5 kWp, the battery capacity must be at least 500 Ah.
Can a wind power inverter feed into a stand-alone grid?
If wind power inverters feed into the stand-alone grid, design the total nominal power of the AC sources in the stand-alone grid to be no larger than the nominal AC power of the Sunny Island. Allow at least 100 Ah of battery capacity per 1000 W of nominal AC power from the AC sources in the stand-alone grid.
How can I order a PV inverter with preset off-grid parameters?
You can order all the listed PV inverters with preset off-grid parameters from SMA Solar Technology AG. The PV inverters must be equipped with at least the firmware version given in the table, or a higher version. If this is not the case, perform a firmware update (see PV inverter documentation).
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