Can any one explain the cost benefits of Evacuated Tube verses Flat Panel for Domestic Hot water only. We are proposing either 2 flat panel or 2 sets of evacuated tube and are only going for domestic hot water, The location is Midwest about 40 miles north of Chicago. I am undecided if the cost of the tube is going to outperform the flat panel and if the cost upgrade is going to pay off.
This is a long standing debate in the solar world.
I am a solar contractor in WI.
For domestic only, it's my opinion that flat plates offer excellent bang for the buck (slightly less bang, and slightly less buck than evacuated tubes) in the upper midwest. as a contractor who runs into my customers at the store, the pub, the YMCA etc. I need to sell stuff that I have absolutely no concerns about the long term viability and durability of the equipment.
evacuated tubes will sure produce hot water, but there are just too many unknowns on the long term end of the equation for me to gamble my reputation and livelyhood on.