Difference between Stand Alone and Grid Connected PV System

At present,solar power systems are mainly divided into three types,off grid solar systems, grid-tie solar systems, and on off grid solar systems. Among them,the off grid solar system is also called stand alone pv system,the grid-tie solar system is also called grid connected pv system.So what is the difference between stand alone and grid connected pv system?

We make the following analysis on the difference between stand alone and grid connected pv system.

1)Stand alone pv system:
The stand alone PV system is completely independent from the grid.It uses solar energy to supply the load with power and to recharge the batteries for backup. An optional generator can be added for emergencies.This stand alone pv system is ideal for remote areas with limited access to the grid.

Or when the power demand in large cities is large,resulting in the shortage or instability of power in some areas,then the stand alone PV system is very important.The stand alone PV system does not rely on the urban power grid to provide stable and reliable uninterrupted power supply for home,office,industry and agriculture,power communication,transportation and travel,data center and other fields.

-Highlights:
Completely independent power solution
Converts solar energy to electricity during the day
Supplies electricity directly to load
Supplies electricity from batteries to the load

2)Grid connected pv system
A Grid Connected PV System way to reduce electricity bills.It includes solar modules to convert solar radiation into electricity during the day and a grid connected pv inverter to supply electricity to the load or sell the excess electricity to the grid through net-metering or feed in tariff schemes.

-Highlights:
Converts solar energy to electricity during the day
Supplies electricity directly to the load
Sells excess electricity to the grid

From the above information,it can be known that compared with grid connected PV systems,the stand alone PV systems cannot export electricity to the grid.So stand alone PV system is mainly used in remote areas with unstable mains or no mains.

We Xindun Power specialize in providing and designing stand alone PV system according to customer’s actual use over 16 years. Welcome to contact me for further details about difference between stand alone and grid connected pv system.We will design the best stand alone PV system solutions for you.