Solar PV System

Solar PV System

A solar system consists of an arrangement of several components such as solar panels (receives sunlight to produce DC electricity), solar inverter (receives DC electricity from solar panels and converts into AC electricity), solar mounting (to install solar panels), and electrical components (breakers/isolators and solar switches). A solar system is installed by licensed electrician who have a valid Clean Energy Council (CEC) accreditation to install solar. AC electricity produced through solar inverter is set to be used at home and the surplus is being exported to grid. The electricity production from solar system can also be monitored either via desktop computer or using app on the phone. Most of solar inverters come with a data logger that allows connecting the inverter with local wifi and thus real time production can be monitored on computer or phone.

 

Figure: Illustration image of an on-grid solar system (courtesy gcea.coop)

Figure: Illustration image of an on-grid solar system (courtesy gcea.coop)

 

There are three types of solar systems that could be installed depending on the specific requirement such as:

 

On-grid solar system:

This is the most installed solar system. This system only works when grid power is available. Electricity produced is preferably set to use at home first then the surplus being exported to grid to receive a cash credit. The credit is offset with the electricity purchased during night, and if there any credit left it will be the property of user.

Main components in on-grid solar system:

- Solar panels

- Solar inverter(s)

- Panels mounting (brackets, earthing lugs, railing etc.)

- Inverter cage (if required)

- Electrical components


Not sure which solar system you would need? Contact us to explore further followed by FREE quote. 

 

Off-grid solar system:

This solar system is designed for areas where grid power is not available. The system is backed up with a battery bank to ensure back power. A back up power source (generator) is mostly required as back up in case if there is not enough power in the battery and/or limited sunlight to produce electricity. Off-grid solar system are normally expensive to buy but are practical in areas where there is no grid power.

Main components in off-grid solar system:

- Solar panels

- Solar hybrid inverter(s)

- Batteries

- Generator)

- Charge controller

- Panels mounting (brackets, earthing lugs, railing etc.)

- Storage cabinet (if required)

- Electrical components

 

Hybrid solar system:

Hybrid solar systems are trending now where excess power is stored in batteries and then used during the night. Moreover, the surplus power is exported to grid to receive cash credit. These systems are less expensive than off-grid systems.

Main components in off-grid solar system:

- Solar panels

- Solar hybrid inverter(s)

- Batteries

- AC or DC coupling (if required)

- Panels mounting (brackets, earthing lugs, railing etc.)

- Storage cabinet (if required)

- Electrical components

Any of the above type can be installed as:

- Roof top solar system (flush and/or tilted panels)

- Ground mount solar system

 

The roof top solar system is common in residential and commercial sectors, while ground mount is installed on farms where there is a limited roof space.

In Australia, solar panels are installed facing north which is the ideal direction for maximum production. Sometime panels could be installed on eastern and western directions as well, however, this would impact production by around 12-14%. Installation on southern direction is not recommended and in fact not allowed it would impact production by over 28%. In such cases, panel should be installed using tilt angles towards north direction.

 

This topic is technical and sometimes difficult to understand, but we tried keeping the information simple for your understanding.


Do not hesitate to Contact us if you need further information to decide which panel you should choose. We are happy to help!