Found 4 results tagged with 'solar'

Solar - third time lucky

Solar - third time lucky

After several failed attempts to create a low cost, low tech solar water heater I gave in and purchased a complete kit off the shelf. It's only August but we've been having some nice fine days and the temperature has been getting up to high 50's. This unit has 20 evacuated glass tubes with some kind of antifreeze that exchanges heat with water that is pumped through the header. While I would have preferred a passive system I do like the modular nature and programmable smarts of the control centre.August 21, 2013  solar  energy  water  technology 
Measuring the sun

Measuring the sun

As part of my ambition to get a solar electric system up and running I have been conducting some tests.

My interest is in the effect of the suns angle to the panel array and the relationship to voltage. While there are probably some models put there, I have not seen any and find that actual experience is much more convincing and reliable.

My observations will influence my decision to include tracking capabilities to my solar installation.

Notice the clever little rod below the panels whose shadow (or lack of) can be used to determine if it is pointed directly at the sun.
May 18, 2011  solar  electric  measure  photovoltaics