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solar water heating in spain

solar water heating in spain, is it worth having, is it expensive, general questions

solar water heating in spain
21 December 2010 @ 13:27

Hi every body, my name is Tony I live in a small village called Agost which is just inland of Alicante, When I arrived in 2003 the first thing I done was starting to renovate the old house we bought in the Campo of Agost, I soon realised that is was becoming a bit of a money pit ! so I decided to go out and do some building work with a friend, Due to my friends poor health I started to work on my own ( leagaly self employed ) , work was ok up to the begining of the crisis, then the building work almost dried up, so I decided to look for a different way to earn a living.

That is when I decided to go into solar water heating, The sunshine is free and we get a lot of it here so it seened like a good idea to give it a go !

FIRST I wanted to see if solar water heating was really any good !

So I bought a solar water heater off the internet, then my problems started , there were no instructions of how to assemble or fit it , only a hand drawn sketch, I figured out how to assemble the unit and then fixed it to my roof , then plumbed it in as to the sketch. Then when I started to fill the unit for the first time I learnt my frist important thing about vacuum tubes and that was dont fill them with cold water on a sunny day because they can shatter.

After getting 2 replacement tubes and this time pre filling them in the shade I started filling the unit with water , when it was full there were more problems water was leaking from some of the seals where the tubed go into the tank.

After contacting the manufacturer I found out that the type of solar water heater I had was a non pressure type and the importers instalation sketch was tolaly wrong ! as it could not have a direct mains pressure water feed .

So i went to the plumbers merchant and got stuff to make my own small top up tank using a piece of capped soil pipe and a toilet float valve !

Now the main tank could fill its self up automaticly via the float valve .

The water was really hot ! but there was another problem - poor preasure ! because the hot water was only coming down at gravity pressure it was ok for the sink but not any good for showering.

So the next  modification was to fit an automatic booster pump to give the hot water more pressure !

In the end the system worked and I proved that it was worth having a solar water heater.

After more reserch I found there were better units that do not rely on gravity so now I import and sell them myself.

I do belive in solar water heating and am sure that it will become more popular here in Spain expecialy as it is not to complicated to self fit .

Like 0


tony said:
10 June 2011 @ 21:18

Glad you liked the post, solar water heaters really do work well and save a lot of energy. my solar water heater got to 92 degrees today !!

go to you tube cssolar1 search to see one of my units boiling in the sun.

Sanny Wang said:
04 July 2011 @ 04:48

like your article,succeed is hard at the begining.

Micoe said:
07 July 2011 @ 09:19

Micoe as an international company ,is specialized in researching and providing the solar thermal systems for families,factories and industries around the world. Founded in 1999, Micoe has grown to be the most professional company in China solar thermal industry.
Now, we have nearly 7,000 staffs ,200 engineers and four production base in China.

tony cssolar said:
18 July 2011 @ 21:43

HI Micoe
I am interested in the possible use of vacuum tubes to desalinate sea water do you make a machine that can do this ?

Peter said:
08 April 2012 @ 02:30

The solar tubes only last for 5-7 years. You are better to buy in spain the flat plate normal solar panels.

They have been proven for over 30 years.

I have one on my house and they are brilliant...Never buy the tube systems.

cssolar said:
10 April 2012 @ 10:24

Thanks for your comment Peter

Ps I think all forms of solar and renewable energy are a good idea including flat and vacuum tube solar water heaters,

yes flat plate units seem to be more popular here in Spain, but generally they are more expensive and under perform in the winter.

Regards Tony cssolar

craig said:
08 June 2012 @ 10:29

I have a new gravity fed solar water heater. It is certainly efficient at heating the water. However the pressure from it is useless. I will have get a pump fitted or exchange the tank for a pressurised one. Anyone know where i can get either of these two units? and what the cost may be?


tony cssolar said:
08 June 2012 @ 12:03

Hi Craig, I had the same problem with the first unit I fitted on my house, The cheapest solution is to fit an auto boost pump which can
handle hot water

They are hard to find here in Spain I had to get mine from China.

Cheers Tony

Julie Medley said:
16 June 2013 @ 17:32

Hi Tony. I am looking into replacing one of these solar water systems, with the tubes, and would really appreciate some advice. Would it be possible to speak on the phone?

tony said:
16 June 2013 @ 17:40

Hi Julie,

Yes you can find my contact number on my website,

or send me an email explaining the problem with your existing solar water heater

Cheers Tony

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