The vast profits from AGW are rolling in.
How long do you think it takes to save the energy required to make a photovoltaic converter? You’re trying to save energy, right?
Luboš Motl at The Reference Frame has the story – RICS: Solar panels pay back in 100 Years (almost).
More precisely, it is actually 200+ years: the panel costs up to USD 10,000 and saves USD 50 per year. For example, you will need about fourty 10-Watt panels that cost about USD 250 each to get somewhere. Wind energy scored comparably badly while the insulation was the winner.
The story of the AGW photovoltaic rip-off is here.
The capital we are investing to save the Earth should be spent on nuclear energy, instead; if we were really interested in saving the Earth.
PS: The PV cells should last a good 30 years.
[In edit: The manufacture of photovoltaic converters is extremely energy intensive; if the PV cell can only repay 1/6 of its purchase price in its useful life, the distinction between energy payback and capital payback becomes immaterial; both are negative]
Added, September 7, 2008
From Belfast Telegraph
Wednesday, 3 September 2008
Solar panels are one of the least cost-effective ways of combating climate change and will take 100 years to pay back their installation costs, the Royal Institution of Chartered Surveyors has warned.
In a new guide on energy efficiency, Rics said that roof panels for heating water and generating power are unlikely to save enough from bills to make them financially viable in a householder’s lifetime. In the case of solar panels to heat water for baths and showers, the institution estimates the payback time from money saved from electricity and gas bills will take more than 100 years – and up to 166 years in the worst case.
Photovoltaic (PV) panels for power – and domestic, mast-mounted wind turbines – will take between 50 and 100 years to pay back.
Given that the devices have a maximum lifetime of 30 years, they are never likely to recoup the £3,000 to £20,000 cost of their installation, according to Rics’ building cost information service. Instead, it suggested people wanting to cut fuel bills should insulate lofts and cavity walls, install efficient light bulbs and seal windows.