Peter Parry wrote:

8----
The 2sq/m is representative of typical retrofit installations. With
present systems there are minimal economies of scale - if you go for
10sqm you have hot(ish) water most of the year but the installation
cost rises proportionately and you just lose more money.


Just a thought.
When planning a solar system do consider the surroundings. In 10 years they
can change significantly. That small shrub next door suddenly becomes a
tree shading your collector in summer.

I the last couple of years our greenhouse has come under the shade of a
neighbour's oak and the tomato crop has reduced significantly.

Edgar