SOLAR ELECTRIC SYSTEM
Grid-tie PV System
“Grid-tie PV System” also known as “On-grid PV System” is a system connected to utility main grid, the power produced by the Solar PV array can be either supplied to loads or feed back into the grid when the output from PV array is greater than the load demand.

SOLAR ELECTRIC SYSTEM
Off-grid PV System
“Off-grid PV System” also known as Stand-alone PV System operates independent from main electric utility grid, often is uses in remote area when the utility power is unavailable or too expensive to bring There are several variations of off-grid solar PV system, depending on your needs and budget.
SOLAR ELECTRIC SYSTEM
Grid backup PV System
“Grid backup PV System” operate as “Off-grid PV system” but can also be connected to the main electric utility grid. The Inverter draws the energy from battery only when is charged by solar panels, this means that 100% of energy is provided by the sun. But in case battery’s power drop under voltage operational limit due higher load consumption or bad weather, the system will switch automatically to main grid and the inverter will start to draw power from the main grid until the battery is be fully recharged again by solar PV array. Once battery is fully recharged, the system will switch back to draw energy from battery as normal.