SMA Sunny Island Battery-Based Inverter SI 4548-US-10
|SMA Sunny Island Battery-Based Inverter
The Sunny Island inverters are bi-directional battery-based inverter/chargers that can be used completely off-grid, or for battery backup in grid-tie systems either with charge controllers or with grid-tie inverters using AC coupling.
The Sunny Island includes sine-wave output power at 120 VAC only. Two or four Sunny Island inverters can be stacked for 120/240 VAC input and output. Three Sunny Islands can also be stacked for a 120/208 VAC three phase input and output. They have low idle losses as well as a 100 A battery charger, and a battery disconnect. State-of-charge metering helps with battery management to ensure maximum battery life. In off-grid systems, the Sunny Island can be used with any standard PWM or MPPT charge controller, but will communicate with the MidNite Classic using the MNSICOMM box. It can also work with the US-40 Sunny Boy inverters in an AC-coupled system so long as the Sunny Boy inverter is set for off grid function. The frequency shift algorithm will work to make the Sunny Boy inverter back off power output to prevent the battery from too much charge. A generator can be connected to the Sunny Island’s AC input to provide backup and battery charging. For grid-tied systems, the newest US-40 Sunny Boy inverters do not have RS485 capability so cannot communicate with the Sunny Island to change grid tie parameters to off grid. This means that the system will not be able to use frequency shift for battery charge control in a grid-tied backup system. The frequency shift in the Sunny Island will work with the newer Sunny Boy inverter in the same manner as with any other grid-tie inverter, causing it to turn on and off as the batteries are charged. In an off-grid only system, the US-40 Sunny Boy inverters can be set for off-grid use independently of the Sunny Island and will work with the frequency shift algorithm.
The Sunny Island utilizes removable SD cards to store performance data from the integrated data logger and to perform firmware upgrades. With one 485USPB-NR and one COMGW-US-10 in each Sunny Island inverter, the CLCON-10 can be added for plant-level monitoring and communication. The CLCON-10 cluster controller enables multiple inverters to be viewed and reported on at the plant level. NOTE: Both the COMGW-US-10 and CLCON-10 require a 24 VDC power supply, which is not included. The Sunny Island inverters are 24″H x 18″W x 9″D, listed to UL 1741 for the U.S.A. and Canada. These inverters are NOT listed to the new UL 1741-SA standard and may be restricted for installation when connected to utilities in areas where that is required. The Sunny Island inverters carry a 5-year warranty.
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