Frostbite [RE-wrenches]

[Allan Sindelar]

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Jeff,
If the loads are minimal when the home is not in use during the winter, you
might design for some PV input redundancy--that is, assuming there is any
winter sunlight up there to be redundant with. Split the array, and run dual
charge controllers, so that a single failure is unlikely to cause a lack of
charging.
Allan at PosE

----- Original Message ----- 
From: "Jeff Oldham" <starpower4u at juno.com>

Thank you all for the feedback from wild to mild it's all good! I've talked
to ton's of battery manufacturers and read all of my own library's data. It
is no surprise to see claims of freezing points all over the map for a fully
charged battery. However, the highest number I saw anywhere was -51F. I
actually got my best input by calling an Interstate distributor in Ankorage,
these guys deal with the true realities everyday. Bottom line is a FULLY
charged cell will not freeze anywhere on this mild planet. I'm opting for
relaibility and K.I.S.S., putting the energy into keeping the battery full
and not risk battery warming loads or other diversions depleting the SOC.
I'm most comfortable with this direction as we all have horror stories about
control failures and with no one around for months it is just to scary in my
mind.
Thanks again all, it will be warming up soon....
-jeff o

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