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03-24-2021, 08:48 PM
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#1
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New Member
Join Date: Mar 2021
Location: SLC
Posts: 1
M.O.C. #28443
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New member
Sold our Jayco Precept and bought a 2010 Montana to be left parked in a desert park for winter living. Is the following enough information for an answer?
2010 Keystone Montana Big Sky 5th wheel summer desert storage with 200 watt solar and 4 six volt .Duracell 75 Amp rated for 120 Min batteries. Everything off including shore power except Super Fan set to go on at 90 degrees. Will the draw on the batteries discharge them or will solar keep the fully charged?
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03-25-2021, 07:37 AM
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#2
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Montana Master
Join Date: Aug 2004
Location: Livermore
Posts: 5,146
M.O.C. #1920
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Just in rough calculations (not using efficiencies of solar panel), a 200 watt panel will produce about 11 amps/hr. A Fantastic Vent uses about 2 amps per hour at max. That is just a Google search, so I didn’t spend a lot of time researching. With four 75 ah batteries (4x75), you have 300 ah. Half or less of that is usable. So, you have 150 ah available or 75 hours without charging. So, if you had 3 days of cloudy weather, you would be out of battery. Also, you have parasitic draws such as the propane detector. You could install a battery monitor like a Victron or Bogart and check the actual current draw and check actual charge rate on you4 solar controller to be exact.
__________________
Ron and Terrie Ames - MOC #1920/KF0NTA
2021Montana 3230CK Super Solar Legacy Package
2021 Ram 3500 Laramie Longhorn, BIM Charging
4x4, SRW, LB, Crew Cab, Pullrite 3900 Hitch
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03-25-2021, 10:36 AM
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#3
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Site Team
Join Date: Jun 2011
Location: Wilsey
Posts: 18,799
M.O.C. #11455
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Welcome to the forum! Ron's answer above is about as good as it gets.
__________________
Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, replaced chairs, sun screens, added awnings, etc.
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03-25-2021, 10:42 AM
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#4
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Montana Master
Join Date: Oct 2018
Location: Anderson
Posts: 2,591
M.O.C. #22835
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Welcome, congrats on the purchase of your Montana. No answers from me on your solar. Just a hardy "welcome!"
__________________
Who you are right now is a sum total off all you use to be.
2019 Montana High Country 375FL
2014 Chevy Silverado Duramax, 6.6L Dually
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03-25-2021, 07:49 PM
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#5
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Montana Master
Join Date: Feb 2008
Location: woodstock
Posts: 542
M.O.C. #8174
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I think you will need more to keep batteries up.
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Ed
Montana Master
Woodstock Ga
2020 3931 FB Legacy
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