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01-14-2023, 07:41 AM
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#1
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New Member
Join Date: Jan 2023
Location: Dewey
Posts: 5
M.O.C. #32220
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solar panel 3791 rd 2021 montana
I have a 2021 3791rd can anyone tell me the panel size. I can find no info in manuals Panel was installed at factory Im first owner
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01-14-2023, 11:43 AM
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#2
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Montana Master
Join Date: Jan 2022
Location: Shingle Springs
Posts: 1,138
M.O.C. #30417
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Quote:
Originally Posted by jblack2743
I have a 2021 3791rd can anyone tell me the panel size. I can find no info in manuals Panel was installed at factory Im first owner
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What solar system did you get? 200, 400, 600 or 1200? My 400 has two 200 watt panels.
https://www.keystonerv.com/solarflex-400i-overview
__________________
Tony & Donna
2022 Montana High Country 295RL, Solar Flex 400, Onan 3600 LPG, 2000 Dimensions inverter
2020 GMC Denali 2500 6.6 Duramax, Demco 21K Auto Slide
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01-14-2023, 04:28 PM
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#3
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New Member
Join Date: Jan 2023
Location: Dewey
Posts: 5
M.O.C. #32220
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There is only one panel As to what i got thats my question ? Shouls i assume one panel means 200 ???
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01-14-2023, 05:52 PM
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#4
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Montana Master
Join Date: Dec 2021
Location: Northeast TX
Posts: 561
M.O.C. #30262
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One panel on a 21 model should indeed be indicative of a 200W panel. I'm surprised you didn't have some sort of sticker near the entrance door stating such. On second thought, I probably should not have been surprised at all. Can I safely assume you have a Victron SmartSolar MPPT 75-15 charge controller? If so then you should definitely have the same 200W base package we have in our MHC.
__________________
 Lee, Edith & Lil' Bit the furry feline alarm clock
22 MHC 331RL, Surge Guard 35550, SumoSprings, disc brakes, 412Ah Lithium, Gen 3 Goosebox
22 Ram 3500 CC DRW 6.7 CTD
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01-15-2023, 05:57 AM
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#5
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New Member
Join Date: Jan 2023
Location: Dewey
Posts: 5
M.O.C. #32220
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No sticker In control panel in kitchen cabinet there is a read out showing incoming voltage amps etc and voltage of battery it says Jarbnoi on it so i believe I do not have a Victron .Thanks for the info you provided leads me to believe I have a 200 watt panel
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01-15-2023, 09:30 AM
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#6
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Montana Fan
Join Date: Feb 2020
Location: BUZZARDS BAY
Posts: 107
M.O.C. #25753
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My 2020 3781 came with 1-250 watt panel.
__________________
2020 Montana 3781RL
2020 GMC 3500 Denali HD Diesel SRW
20k Demco slider hitch
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01-15-2023, 01:34 PM
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#7
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Montana Master
Join Date: Jul 2020
Location: Battleford
Posts: 622
M.O.C. #26690
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Quote:
Originally Posted by Foldbak
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In 2021, they did not have the above designations; your choices were "Solar Flex" or "Super Solar Flex". The solar flex option included 1 solar panel and a small inverter with 5 outlets inverted. The super solar flex option included 4 solar panels, much larger inverter and all outlets and both AC units were inverted.
Just to confuse things, though, early in the 2021 model year, the units were shipped with Jaboni 265 watt panels, but by the time we received our unit in November 2020, the model year 2021 units had been upgraded to Jaboni 300 watt panels. We have a 2021 3791RD also, and chose the Super Solar package and as noted, we have 4 of the Jaboni 300 watt panels.
So, it would seem you have the regular "Solar Flex" package and that your single panel will be a Jaboni. What I cannot tell you is whether that single panel is a 265 watt or a 300 watt. That can be determined by the serial number of your unit.
You could try Keystone support directly, but we were told to directly contact the solar company that provides the gear to Keystone. The main guru there is Matt Wolkins, and his email is mattw@futuresalesrv.com . I have found Matt to be very knowledgeable and very responsive.
BTW, why are you asking? Are you having issues? (Matt can help diagnose). Or, are you looking to add more panels? If so, then you could add other brands but they would have to match closely; or Future Sales can sell additional Jaboni (or Victron) products, and even offer installation services at their facility. Matt is the place to start.
All the best with sorting this out!
Brad
__________________
2021 Montana 3790RD, Legacy, Super Solar Flex
2020 RAM 3500 Limited, HO
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01-15-2023, 01:50 PM
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#8
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New Member
Join Date: Jan 2023
Location: Dewey
Posts: 5
M.O.C. #32220
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Thank you for response From your info I believe I have the solar flex package m not having any problems just would like to know what I have. I will reach out to Matt Trailer was brand new off the lot but no info on the solar system in any of the info . Guess it would have been to hard for montana to include that in the manual
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01-15-2023, 01:51 PM
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#9
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Montana Master
Join Date: Jan 2022
Location: Shingle Springs
Posts: 1,138
M.O.C. #30417
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Quote:
Originally Posted by kowbra
In 2021, they did not have the above designations; your choices were "Solar Flex" or "Super Solar Flex".
Brad
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That's odd since the brochure states differently  The brochure says Solar Flex 200 was standard. 400 and 1200 was optional.
https://keystone-rv-dealer-app.cdn.p...e_0921_WEB.pdf
My bad that's a 2022
__________________
Tony & Donna
2022 Montana High Country 295RL, Solar Flex 400, Onan 3600 LPG, 2000 Dimensions inverter
2020 GMC Denali 2500 6.6 Duramax, Demco 21K Auto Slide
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01-15-2023, 02:10 PM
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#10
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Montana Master
Join Date: Jul 2020
Location: Battleford
Posts: 622
M.O.C. #26690
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Quote:
Originally Posted by Foldbak
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Yes, I think by the 2022 models, they had expanded the options, and adopted the new naming schema.
What is often the case with RVs, unlike with cars, is that even major changes might be made during the course of a model year. So, it is entirely possible that late 2021 model year runs could also have adopted the new solar packages (I don't know that for sure, rather just noting that major changes like this do happen and often add a lot of confusion for owners trying to sort things out).
Brad
__________________
2021 Montana 3790RD, Legacy, Super Solar Flex
2020 RAM 3500 Limited, HO
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01-16-2023, 07:06 AM
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#11
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New Member
Join Date: Jan 2023
Location: Dewey
Posts: 5
M.O.C. #32220
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Thanks to all resonders .Kowbra gave me Matt Wilkins contact info. Matt responed and based on info I provided said I had a 265 watt panel . Thanks Matt
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01-16-2023, 07:50 AM
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#12
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Montana Master
Join Date: Jul 2020
Location: Battleford
Posts: 622
M.O.C. #26690
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Quote:
Originally Posted by jblack2743
Thanks to all resonders .Kowbra gave me Matt Wilkins contact info. Matt responed and based on info I provided said I had a 265 watt panel . Thanks Matt
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Thanks for the update; sometimes folks ask questions then disappear, so we never know if they got what they needed.
I'm glad Matt responded so quickly and that you got the info you needed!
Now, if you ever really start using your system off the grid, keep Matt's email handy - we love having the 1200 watts of solar and over 500ah of lithium batteries... it is absolute freedom to go almost anywhere at anytime.
BTW, if you want to see some ideas on DIY mods, I started a thread here - https://www.montanaowners.com/forums...ad.php?t=84665
Enjoy your rig, they are fantastic!
Brad
__________________
2021 Montana 3790RD, Legacy, Super Solar Flex
2020 RAM 3500 Limited, HO
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01-16-2023, 08:45 AM
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#13
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Montana Master
Join Date: Aug 2004
Location: Livermore
Posts: 4,936
M.O.C. #1920
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As Brad mentioned, there were lots of changes over the past three years. Also, Montana decided not to offer the 600i, for some reason. Many of the early Jaboni’s on Super Solar (now 1200i) failed and were undersized. Many upgraded to Victron 50 amp charge controllers. In 2022, they changed the solar equipment back to the front bay instead of under the steps. They also had a period of time where the Battleborn Gamechanger wasn’t certified so they went back to 6 100ah batteries. Then there was the dreaded PD Transfer switch failure leading to the switch to Southwire. So, when talking Solar, it is critical to know timeframe, which solar package and what equipment you are running. Also, many dealers are not telling their customers about the Keystone app that has a section on each solar package and how it works.
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Ron and Terrie Ames with Sirius - MOC #1920
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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01-18-2023, 01:14 PM
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#14
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Montana Master
Join Date: Jun 2020
Location: Qualicum Beach
Posts: 636
M.O.C. #26399
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Check label on backside
__________________
2018 Keystone Montana 3811MS
2017 Ford F450 diesel dually
600AH Battle Born Lithium Batteries, 1,080 watts solar
3,000 watt hybrid inverter with 120A charger
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01-18-2023, 01:32 PM
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#15
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Montana Master
Join Date: Jul 2020
Location: Battleford
Posts: 622
M.O.C. #26690
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Quote:
Originally Posted by bcrvman
Check label on backside
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Or, to save going up on the roof to remove panel, read the answers in this thread
Brad
__________________
2021 Montana 3790RD, Legacy, Super Solar Flex
2020 RAM 3500 Limited, HO
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