It was inefficient to produce solar panels when PV technology was young years ago, producing solar panels cost around $40,000 per Watt. Modern date solar technology enables highly efficient solar panels. Impartial studies have done to show that the payback time for average solar systems to save enough to offset their production cost only takes three to four years. Putting into consideration that most solar panels have a life span longer than 25 years, it is very wrong to call that wasteful.
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