Some info to help along. I think you are missing the point of solar panel or solar hot water systems(and other technology and new ones as they emerge) and that it is $100million per year till 2020
It is $1000 each for 100thousand homes per year. That is better incentive but it doesnt run for 10years so does not equal 1mill homes
One Million Roofs Solar Program
Borrowing a term previously used in California to promote solar energy use,54 a Coalition
Government will provide additional ongoing support for the use of solar energy by Australian
families and households.
Our goal is for one million additional solar energy roofs on homes by 2020, including either solar
power or solar water heating systems.
To achieve the goal of one million additional solar energy roofs by 2020, the Coalition will provide an
extra $1000 rebate for either solar panels or solar hot water systems. The program would be capped
at 100,000 rebates per year and would therefore be capped at a total cost of $100 million per year.
The rebate will be on top of existing incentives and will replace the current solar hot water incentive
when it ends. It is intended that the rebate will remain in place until 2020.
Installing an entry level 1kw solar panel on the average household roof will reduce CO2 emissions by
about 1.8 tonnes per year. Similarly, replacing an old peak electric hot water system with a solar hot
water system will reduce CO2 emissions by up to 3 tonnes per year.
Depending on the proportion of rebates provided for solar heating and solar panel, this initiative will
therefore provide an additional annual CO2 emissions reduction of 2.4 to 3 million tonnes by 2020.
Given their solar energy classification, heat pumps will be eligible under the program.
In consultation with the renewable energy sector, we will also consider the inclusion of ceramic fuel
cells and other new domestic technologies which may emerge.
Information from the Direct Action Plan document
http://www.liberal.org.au/~/media/Files/Policies%20and%20Media/Environment/The%2... Looks like a pretty good scheme if it is affordable and actually goes ahead - I have no idea where they are going to get all the money for their commitments from.