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Rooftop Solar Now on Over 750,000 Australian Homes

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Here are some awesome stats and graphs on Australian rooftop solar, via REnew Economy:

The latest data from the Australian Clean Energy Regulator shows that more than 750 000 homes in Australia are now equipped with solar PV panels totalling almost 1.7 GW of installed capacity says the Sustainable Energy Association of Australia (SEA).

With 8 million homes in Australia and existing growth trends, more than 10% of homes will have installed solar panels within the next couple of months.

Figure 1. Cumulative number of solar panels (as measured by SGUs).

Installation rate of solar has slowed slightly from 2011 when more than 860 MW of solar PV was installed, but based on current trends an additional 600 MW of small scale solar capacity is likely to be added in 2012.

Figure 2. Cumulative capacity of solar panels (kw – as measured by SGUs).

Forecasting installation rates forward, Australia is likely to have a million homes with solar in around 12 months time, bringing installed capacity of small-scale solar to over 2.3 GW.

Average system size continues to grow, with systems recorded for June 2012 averaging 2.84 kw, but with changes in feed-in tariffs occurring around Australia, this trend looks set to reverse.

Figure 3. Average size of solar panel installations (kw – as measured by SGUs).

Changing policy

Changes in the solar multiplier led to an accelerated installation up to June 2011, and with further staggered perturbations to the market caused by changes in feed-in tariff policies in different states.

Figure 4. Number of solar panel installations by month (as measured by SGUs) (April – June 2012 data excluded as preliminary)

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Figure 5. Capacity of solar panel installations by month (as measured by SGUs) (April – June 2012 data excluded as preliminary).

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Figure 6. Average size of solar panel installations by month (as measured by SGUs).

Feed-in tariff policy is expressed in sudden changes in the average size of installed systems. The most dramatic impact of this seen in Western Australia where the termination of a solar feed-in tariffs were announced without warning.

Queensland now has the largest amount of installed solar in the nation with over 475 MW.

Table 1. Preliminary numbers and installed capacity of solar, as measured by Small Generation Unit (SGU) certificates to 30 June 12 by State. (Note figures will continue to rise for 2011/12 due to a 12 month creation period of SGU certificates.)

Professor Ray Wills is chief adviser to the Sustainable Energy Association (SEA)

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