Solar Power and your Home: The Basics
Residential PV systems are affordable and easy to install.
Solar power basics:
When the sun shines on your solar panels it generates direct current
(DC) electricity. The DC electricity travels along the wires to an
‘inverter’ which converts it to 240Volt (alternating current) AC
electricity. This is the same kind of electricity which is supplied by
your energy provider to power the appliances in your home.
The
maximum amount of energy which can be generated by the solar power
system under ideal conditions is measured in kilowatts (kW). The actual
amount of energy a solar system produces over time is measured in
kilowatt hours (kWh). kWh is also the measurement your energy provider
uses to charge you on your electricity bill.
If
your solar system produces more power than your house is consuming, the
surplus energy is fed into the mains grid. At night when the solar
system is not producing power, your home is powered by the mains grid
as normal.
In Queensland, the surplus energy produced during the day
can be sold to the energy provider (Ergon or Energex), to assist in
reducing your energy bill. For those people who have efficient homes,
you may even earn money back.
Rebates: Solar Credits Scheme
Under this scheme, homes which install solar panels will be awarded with five-times the amount of Renewable Energy Certificates (RECs) for every megawatt-hour (MWh) of clean energy their system produces, up to a system size of 1.5 kilowatts peak (kWp).
This means 5 x RECs for every 1MWh your system is predicted to produce for the first 15 years of operation.
For the extra portion of a system which is over 1.5kWp, only 1 REC per 1 MWh of energy produced will be issued.
RECs created with the installation of new roof-top solar panels, can be sold to reduce the up-front cost of the system.
As a tradeable commodity the price of RECs will change over time.