I though I would Share some Points From a Consumer Guide from the Clean Energy Council.

The Link is Below if you would like to Read the Whole thing.


http://www.solarchoice.net.au/blog/wp-content/uploads/Solar-Choice-Clean-Energy-Council-Solar-PV-Consumer-guide.pdf



A system manual that provides operation, maintenance and safety information should be provided by your installer. This must also include a system energy output (kWh) estimate.



 What angle should the solar panels be on?

 Solar PV panels produce most power when they are pointed directly at the sun. In Australia, solar modules should face north for optimum electricity production. The orientation of the panels will often have a greater effect on annual energy production than the angle they are tilted at. A minimum tilt of 10° is recommended to ensure self cleaning by rainfall. For grid-connected solar PV power systems, the solar panels should be positioned at the angle of latitude to maximise the amount of energy produced annually. Most Australian homes have a roof pitch of 20° to 30°. If your roof’s slope is not ideal, your accredited designer can create an appropriate mounting frame to correct the orientation and elevation of your panel. Failing this, the designer can advise you on the difference in energy output for different tilt and orientation.

Shading / Dirt Solar PV

panels should ideally be in full sun from at least 9am to 3pm. They should not be placed in shaded areas and be kept free from dust and dirt. Even a small amount of shade - from things like trees, roof ventilators or antennas - will have a large impact on the output of a panel, as it changes the flow of electricity through the panel. Shading or dirt on just one of the cells in a solar panel results in a loss of power from many cells, not just the one that is shaded.

Temperature

 The amount of electricity a solar PV panel can generate is reduced as temperatures increase. Solar panels operate best at ambient temperatures up to 25°C. However, if the ambient temperature is higher, the panel’s output declines.

 Warranties

 o What kinds of warranties come with the products? o Which warranties are your responsibility and which are the manufacturer's? o How long have the equipment manufacturers been in the PV industry? Long warranties are meaningless if the manufacturers aren't around in five years. o If you have to deal with the panel or inverter manufacturer in the future, do they have an Australian office?