Solar Flare wrote:
Which diff thermostat model did you order?

Nothing very exciting.
I got the old standby Goldline GL30

I looked at several others that had more bells and whistles, including some nice
logging and reporting features, but decided in the end that Goldlines long track
record for a reliable product was more important. If you got just the wrong kind
of controller failure, your collectors might be in danger of freezing.

I have a logger to track performance, so extra reporting features on the
controller would just be icing on the cake.

Gary



"Gary" wrote in message
...
My differential controller has not arrived yet, so I was just
turning the pump
on when the sun got on the collector and off in late afternoon --
I'm sure the
controller will be better. I was also fooling around with things
all day, and
had the tank cover off part of the time. But, it went from about
80F up to 143F
the first sunny day. It lost about 5F overnight (something I need
to improve a
lot). The next day was also sunny, and it went up to 175F by the
end of that
day. The slope of the tank temperature plot looks like it would
have kept going
over 175F had the sun not gone away -- i.e. the max temperature
appears to be
somewhat greater than 175F. I plan to limit it to around 170F for
the sake of
the EPDM liner.
Gary

www.BuildItSolar.com

"Build It Yourself" Solar Projects





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Gary

www.BuildItSolar.com

"Build It Yourself" Solar Projects