http://www.navitron.org.uk/forum/index.php/topic,276.0.htmlhttp://www.navitron.org.uk/forum/index.php/topic,835.0.html 
Apart from that, there are absolutely reams on the minutiae of solar systems in other threads - if in doubt, or you get confused, refer back to those two original faq threads. I have noticed the weakness of a discussion board such as this is that often a complete newbie to plumbing will find a thread where someone has picked up what they think is the bees knees of a solar tank off Fleabay, and are busy extolling it's "virtues", and have totally overlooked or haven't grasped the basics, sometimes it can be very misleading - the other blind alley is the "mine's bigger than yours" power game, whereby one sees ever larger tanks being employed in the vain belief that it will "improve" matters........

Keep it simple, leave the stuff on Fleabay where it is, and stick to the tried and tested
