"Off Grid" or "Stand Alone" Systems are the systems that are installed on a Stand alone basis with out any support from the utility power. These systems are mostly installed in remote areas where utility power is not available or not reliable. 

These systems could either be used to charge the batteries that serve as an Energy Storage device or could work directly using the solar energy a vailable in the day times. The applications where the Solar Energy is stored in the batteries include Home lighting systems, Hoarding lights, Street lights, Diesel Replacement Systems, Portable Lanterns , etc .