The SMA Sunny Island 4500W Inverter SI4548-US-10 can be used completely off-grid in combination with Sunny Boy grid-tie inverters to have battery back up and access to the grid in the same PV system. The Sunny Island is a complete power center with a maximum efficiency of 96%.
The Sunny Island 4548-US provides 4500 Watts of sine wave output AC power of 120V at 60Hz. Two Sunny Island inverters can be wired together to provide 120/240V 60Hz split-phase output. Up to twelve Sunny Island inverters can be integrated into an off-grid system of up to 100 kW. The Sunny Island features an integrated battery disconnect, data monitoring and system control. Consider the Sunny Island SI6048-US-10 when your application demands more power.
When the sunny island is connected as a grid-tie battery back up system, it will power up critical loads during utility grid blackouts. Combined with a Sunny Boy grid-tie inverter and a bank of batteries, the Sunny Island will allow your solar PV panels to power loads and charge the batteries. Under regular conditions, the power from your solar panels will be fed into the grid. During a power outage, the Sunny Island will supply your emergency loads with power from your battery bank.
In off-grid systems the Sunny Island will provide continuous reliable power for your loads. The high conversion efficiency will ensure that only the necessary power is drawn from your batteries. When solar power is desired for charging the the battery bank, a Sunny Boy needs to be paired to the system, eliminating the need for a charge controller. The battery bank can also be charged directly from the solar source using a charge controller. A generator can be connected to the Sunny Island to provide back-up battery charging.
The Sunny Island 4548-US is UL Listed and comes with a standard 5-year warranty.