On Sat, 01 Mar 2008 23:40:38 +0000 (GMT) someone who may be "Dave
Liquorice" wrote this:-

On Sat, 01 Mar 2008 16:02:30 +0000, Andy Champ wrote:

On a day like today, which is probably a fairly average day - bright but
not much sun, temp. about 10 - what's the equilibrium temperature of the
panel?

Fecj knows I haven't got one and it would vary from system to system as
pipe lengths insulation levels etc would all be different.

It also depends on the control system. In systems with more
complicated controls than the Solartwin nothing would happen until
the panel has been warmed up to a suitable temperature above the
storage. Once the pump has been started, what happens next depends
on the sun and the control system.

BTW air temp is not particulary relevant apart for affecting the loss
rate. Solar panels can produce useful energy is sub zero temperatures,
they absorb solar radiation not heat from the air.

People in this newsgroup would argue against such a statement if a
few of us made it. Let's see what they do with you having made it.


--
David Hansen, Edinburgh
I will *always* explain revoked encryption keys, unless RIP prevents me
http://www.opsi.gov.uk/acts/acts2000/00023--e.htm#54