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What are the cost and efficiency differences between Sun Ray (all copper) Collectors and (copper aluminum) collectors?

April 26, 2017aluminum collectors Copper COST differences efficiency Ray Sun

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What are the cost and efficiency differences between Sun Ray (all copper) Collectors and (copper aluminum) collectors?

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A. The costs of all copper absorber solar collectors are about 20 % to 30% higher than the copper aluminum absorber collector. The copper aluminum collectors are only about 2% to 3 % less efficient. All one has to do is slightly increase the total collectors surface area.