On Fri, 30 Jun 2017 08:07:42 -0700, JS wrote:
On Friday, June 30, 2017 at 4:16:52 AM UTC-7, Martin Gregorie wrote:
On Thu, 29 Jun 2017 17:02:56 -0700, JS wrote:
Just got off the roof, where I measured my installation with an IR
thermometer. Believe that's what Bob meant by heat gun.
Exposed roof: 135 to 140F, 57 to 60C Shaded roof: 100F, 38C.
PV panels: 120F, 49C
Do you know what the electrical output from your panels was at that
time?
Watts/m^2 would be v.interesting.
Just curious. I thought about fitting solar electric and/or water
heating panels to my roof a while back, but its a non-starter because
the town council owns a row of very large oaks just over my southern
fence (10m from the house), and I haven't a cats chance in hell of
getting them trimmed.
--
martin@ | Martin Gregorie gregorie. | Essex, UK org |
Didn't look, Martin.
The system has been in so long that as a rule I don't think about it any
more. This was a test for the temperatures, for anyone who'd like to
calculate if thermals would be better or worse.
Yes, understood, Jim. I was just curious to see if it was possible to see
how much of the roof
anel temp difference was due to generated power
and how much was down to albedo difference.
Just wish I was in a better position both w.r.t latitude (51.779N) and
oak trees to consider adding some solar stuff to my roof.
--
martin@ | Martin Gregorie
gregorie. | Essex, UK
org |