i built a system for a friend's seasonal (summer) off-grid residence in alaska. my instructions were simple: leave the pv input & cc output breakers "on" and the load breakers (inverter, dc sunfrost etc) "off". there was never a problem with winter freezing (even at -40f) until one year when he accidently left the inverter's breaker on. even with no load, the inverter's idle current drained the batteries and they froze. he only made that mistake once. todd On Saturday, April 30, 2016 8:13am, "Solar" <dahlso...@gmail.com> said:
> I do systems like this every year. (-45F winter temps). Use quick connects and > train the customer on the batteries and their maintenance. Find bats with > freeze > points that match your area. I typically mount the modules at 90degree so snow > never covers the array/module. > > I always recommend removal. I've thought about temp controlled incandescent > lamp > with a timer in a battery box for really cold nights.... Haven't got around to > working through that design. > > I'm interested in the real seasoned off-grid installers thoughts about this. > > Jesse Dahl > > NABCEP PV Installation Professional > IBEW Local 292 - Electrician > Electrical/Solar PV Instructor - HCC > > Sent from my iPhone > > > On Apr 30, 2016, at 9:07 AM, AE Solar <autonomousenerg...@gmail.com> > wrote: > > > > Hey Wrenchers, > > > > A friend wants a very small battery set up at hunting cabin (like under > > 1kW). > It will only be used in the warmer months. I'm wondering what you all > recommend > for the batteries over the winter. I assume the ideal situation would be that > they > would be disconnected and brought somewhere warm for the winter (the cabin > will be > subject to below freezing temps)?? > > > > So long as they go into the colder months with a full charge is it alright > > to > leave them hooked up? I don't think the friend will be savvy enough to > disconnect/connect them every year and I don't feel like having to go out > there > every season for them. > > > > Thanks for any thoughts. > > Adam > > > > Adam Katzman > > Autonomous Energies > > > > _______________________________________________ > > List sponsored by Redwood Alliance > > > > List Address: RE-wrenches@lists.re-wrenches.org > > > > Change listserver email address & settings: > > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > > > List rules & etiquette: > > www.re-wrenches.org/etiquette.htm > > > > Check out or update participant bios: > > www.members.re-wrenches.org > > > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > Sent from Finest Planet WebMail.
_______________________________________________ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
