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I hope we don't have to wait for the price of oil to rise to dramatic levels before we can replace that kind of machinery?
Anyway, the price trend for solar panels and batteries is downwards. There will be a tipping point where it becomes the way to go. It may be different for each application and situation, but gradually more and more systems will be converted.
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2011 Honda Insight + HID, LEDs, tiny PV panel, extra brake pad return springs, neutral wheel alignment, 44/42 PSI (air), PHEV light (inop), tightened wheel nut.
  lifetime FE over 0.2 Gmeter or 0.13 Mmile.
For confirmation go to people just like you.
For education go to people unlike yourself.
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