FollowupID: 471424 Submitted:
Wednesday, Dec 20, 2006 at 14:35
Geoff (Newcastle, NSW) posted:
You've just hit the nail on the head with this one. First let me say we need to explore all avenues of renewable energy, not just solar
. And I am a fan of the correct application for solar
The energy used to produce the lead, zinc and sulphuric acid for the batteries need to be factored into the payback along with the CO2 produced. That's without mentioning the lead and zinc dust and other nasties that must be removed from the exhaust gasses produced during the smelting process.
Then we need a special room to store our batteries at home. More cost in the construction, design and approval process.
Also, how many home owners do each of us know that has the skill and inclination to service and maintain banks of storage batteries?
Then there's the solar
panels, the too require energy to produce, give off CO2 in the production process and produce waste products that must be dealt with.
Now, on to what the man from BP Solar
How long will a set of static lead acid batteries last? Providing the owner truly knows how to look after them they'll probably last at best maybe 10 years. That'll take the payback way beyond 25 years as the man from BP Solar
mentioned is best case!
On to the solar
We need to look at the output versus time curve for the panels. I'd be very surprised if the majority of panels have half the output at 15 years they had when brand new.
Again our payback is going way beyond the 25 years under ideal conditions!
True payback period?
Who knows, probably closer to 75 to 100 years by the time we buy a set of batteries every ten years and take into account panel output degradation, replacing them on a planned basis.
is excellent, it's emerging and needs to be explored, invested in and supported but right now today it's just a small expensive part of the greater solution
There are far too many "experts" extolling the virtues and short payback periods of solar
energy. They're telling me if I only increase my mortgage by $50,000 over 25 years I'll reach energy nirvana! Umm, sorry mate I won't.
Grey hair is hereditary, you get it from children. Baldness is caused by watching the Wallabies.