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What factors will affect the price of the system quoted to me?

Solar systems have an upfront purchase price but in the case of low quality solar there is also likely to be on-going Technician costs, repairs, premature replacement and the lost financial savings of low output. Fundamentally, like all consumer products, with solar you tend to get what you pay for.

There are tens of thousands of permutations of panels, inverter solutions and roof/building factors that affect the cost of solar power. The main factors affecting the price of a solar system are outlined below:

  1. Federal Government mandated rebates, called STC's, vary geographically and are based on the estimated solar output for that area. So for example Perth, WA has more sun than Hobart, Tasmania and systems installed here receive more STC credits.

  2. STC rebates are a financial instrument (like a company share) and there value goes up and down on a daily basis.

  3. Panel & inverter quality and installation workmanship vary hugely. Australia has tended to attract lower quality panels & inverters and while they may appear superficially cheap upfront, the longer term costs in relation to lower output performance, premature failure and high maintenance costs are often ignored.

  4. System size/number of panels being installed. Bigger systems tend to be more expensive.

  5. Tilt frames, ground mounts or cyclone rated racking require more labour and materials and cost more. 

  6. Type of inverter. String inverters, micro inverters and optimiser solutions all have different costs. More expensive inverter solutions will generally give a higher output and bigger savings than a simple string inverter.

  7. System design and configuration is more expensive on complicated roofs.

  8. Relocation costs of objects causing shading, such as antennas, whirly birds, pool heating tubing

  9. Type of roofing. For example tin roofs are generally cheaper to install on than tile. Certain tile roofs may require special more expensive fixings and extra labour. 

  10. Height & angle of roof. Single or multi-storey. Steep and two story roofs generally require the use of boom or scissor lifts and extra height safety measures.


Your local solar power system installer will be able to give you professional advice and pricing (LG Dealer Search).

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