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samschaperow

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Reply with quote  #1 
I keep seeing how expensive they are, with paybacks that can be decades long.  But, I found that https://www.alibaba.com/trade/search?fsb=y&IndexArea=product_en&CatId=&SearchText=hot+air+solar+thermal+collector&viewtype=G has them for what seem to be good prices.  Unfortunately, I'm a novice and can't be sure if these are great deals or bad deals.  Can anyone weigh in? 

https://www.alibaba.com/product-detail/Solar-Thermal-Collectors-Solar-thermal-System_60608653969.html?spm=a2700.7724838.2017115.24.14de7d8afv03HO is one of the entries that appears at the link in the above paragraph, which looks promising. 

KevinH

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Reply with quote  #2 
Those are water heaters (lots of bad product descriptions there).  The cost of getting a small quantity of something that large shipped from China would be high and would have to be taken into account.

Kevin H
MN
Rick H Parker

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Reply with quote  #3 
Buying off Alibaba is not like buying on eBay. Shipping and customs cost is not included in the prices. Also doing a transaction is a lot more work then a transaction on eBay.

How to buy on Alibaba


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Rick H Parker
Kansas, USA
Electronics Engineering Technologist
samschaperow

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Reply with quote  #4 
So, even all these are for water heating?:
https://www.alibaba.com/product-detail/Solar-Thermal-Collectors-Solar-thermal-System_60608653969.html?spm=a2700.7724838.2017115.24.14de7d8afv03HO (this is the 1st link to a single product I posted here today)
https://www.alibaba.com/product-detail/Hot-selling-black-selective-coating-solar_60199145574.html?spm=a2700.7724838.2017115.31.79f53637twMThT (this one even shows the panels on the side of a building like you'd see w/air heaters)
https://www.alibaba.com/product-detail/Energy-saving-flat-panel-solar-hot_60204124131.html?spm=a2700.7724838.2017115.152.79f53637twMThT

They all look to be air heaters as far as I can see.

As to the shipping cost and other complications, yes those may ruin my plan, but I am inquiring about shipping costs.  I could order a lot of them, given I have a good amount of wall space that may make use of them, but I'd want to be not only sure the price will be fine, but also that I've chosen a good product.  The latter is hard for a novice like me. 

stmbtwle

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Reply with quote  #5 
They SAY air collectors but if you look closely you'll see what looks like pipe fittings at each corner. Look like water collectors to me.
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Solar is like the wind. It may be free, but putting it to work isn't!
Willie, Tampa Bay
samschaperow

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Reply with quote  #6 
Do you mean those 4 little black things sticking out (pic from one of those links [https://www.alibaba.com/product-detail/Hot-selling-black-selective-coating-solar_60199145574.html?spm=a2700.7724838.2017115.31.79f53637twMThT] shown below) mean it is for water?  If not, which pic for that link shows pipe fittings? 
prodcut-image
stmbtwle

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Reply with quote  #7 
Yep those little black things. They look like copper pipe stubs that you solder your plumbing to. I have a water heater on my roof and another in my side yard that look EXACTLY like that.

Click on some of the other pictures, you'll see the fins and tube grid too.

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Solar is like the wind. It may be free, but putting it to work isn't!
Willie, Tampa Bay
samschaperow

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Reply with quote  #8 
Wow, so not a single solar air heater in all of alibaba?
Is it possible they do a dual purpose, having these collectors work for both air or water?
Rick H Parker

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Reply with quote  #9 
They SAY air collectors but if you look closely you'll see what looks like pipe fittings at each corner. Look like water collectors to me.

Some say "Application:
Water Heater" in the details. There are some listings on Alibaba calling Evacuated Tubes ... Hot Air Collectors.

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Rick H Parker
Kansas, USA
Electronics Engineering Technologist
stmbtwle

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Reply with quote  #10 
Hook'em up to a fan coil, with or without storage.


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Solar is like the wind. It may be free, but putting it to work isn't!
Willie, Tampa Bay
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