Sma sunny island 6048 battery inverter 5750w 120vac 60hz 56a transfer 48vdc sinewave 100a charger 10 yr warr with bts si6048-us-10 the new sma sunny island 4548-us and 6048-us inverters are based on the sunny island 5048-us s proven off-grid technology but with a 20% increase in power production. Peak output is assured by a maximum efficiency of 96 percent resulting in lower diesel consumption in rural areas. Simplified system preparation is made possible by more flexible sizing. Up to 12 sunny islands can be built into off-grid power systems up to 100 kw in size using multicluster technology. Sunny island inverters are bi-directional battery-based inverter chargers that can be used fully off-grid or as a battery backup in grid-tie systems using charge controllers or grid-tie inverters with ac coupling. Just 120 vac sine-wave output capacity is included in sunny island. For 120 240 vac input and output two or four sunny island inverters can be stacked. Three sunny islands can also be stacked for a three-phase input and output of 120 208 vac. They have a 100 a battery charger and a battery disconnect as well as low idle losses. Battery control is supported by state-of-charge metering which ensures full battery life. The sunny island can be used with any normal pwm or mppt charge control in off-grid systems but it can only communicate with the midnite classic through the mnsicomm package. It can also be used in an ac-coupled configuration with the us-40 sunny boy inverters ...