Grid supply solar lighting (often referred to as grid tied solar lighting’ or grid connect solar lighting’) is a series of lights with solar panels (usually attached to the top of the pole) connected to the electricity grid, drawing off the grid at night when the lights are operating, and generating electricity during the day.
Depending on your reasons for considering solar lighting and the rebate policies of your energy retailers, grid supply solar lighting provides you with another renewable energy option, whilst giving you the reliability of mains power. This is especially advantageous in lower sunshine regions.
Grid supply solar lighting is only suited to sites where mains electricity is already available, and generally provides the best pay back when installed on a premises that has day time electricity usage (such as a shopping centre, library, daycare centre or office etc).
Therefore the electricity created by the solar panels in the day is used on the spot, reducing the amount of electricity that has to be purchased.
Both stand alone and grid supply have pros and cons. Grid tied is obviously more suited to lighting requirements in close proximity to existing electricity infrastructure or where trenching and cabling is easy.
Grid supply solar lighting also eliminates the requirement for batteries.
In most instances, GSSL (grid supply solar lighting) provides the best return on investment when incorporated into the design of a new project, well before construction begins, and when a reasonable amount of lights are being used (more than approximately 8 to 10).