Whoa, slow down! What is the difference?
An off-grid system stores energy captured by the sun in a battery to be used when needed by the inverter. A Grid tied system typically has no batteries (ie no storage) and passes any excess electricity back to the electricity provider in the area. Off-grid systems are common in remote areas with no connection to the main electrical distribution network or in areas with erratic electrical supply. Grid tied systems are more common in developed countries with a reliable electrical grid.
