Is the SMA Sunny Island an ON or OFF Grid Inverter?
The item is described as an off-grid inverter but the "About This Product" description says it is a Grid-Tie String Inverter. I'm not too sure which description fits the product or if there is really any difference between an off-grid or grid-tie inverter. I know what off-grid is and what grid-tie is, It's just that I don't know why the item is describe different ways. Thanks in advance for any help in learning about this item. Sam