DIY Solar Concentrator

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Parabolic Evacuated Tube

http://www.ffwdm.com/solar/solar-index.htm - $110 USD per kW of heat?

BOM

$25 per 7 foot evacuated Tube - [

https://www.ebay.com/itm/solar-hot-water-heater-vacuum-tubes-30-tube-sets-free-pick-up-California-/273691205462]

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