Good Sam Club Open Roads Forum: Requesting your thoughts on Montana Super Solarflex system
Open Roads Forum Already a member? Login here.   If not, Register Today!  |  Help

Newest  |  Active  |  Popular  |  RVing FAQ Forum Rules  |  Forum Posting Help and Support  |  Contact  

Search:   Advanced Search

Search only in Technology Corner

Open Roads Forum  >  Technology Corner

 > Requesting your thoughts on Montana Super Solarflex system

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
ncognet0

Moab Utah

Full Member

Joined: 06/12/2006

View Profile


Offline
Posted: 07/06/20 08:17am Link  |  Quote  |  Print  |  Notify Moderator

Im pondering buying a new coach and am intrigued by the new Super Solar system by Keystone Montana. I really like the idea and concept that its 100% powered by the sun. They even claim it can run the AC units/microwave/heater... everything. My dilemma is this, the last "newest upgrade thing" I purchased was a tankless hot water heater in my old 5th wheel and hated it. I had to run several gallons of water through it before it got hot, that don't work for dry camping. That being said is the 15 K worth it for this off grid solar system? Anyone have it? Thoughts?

2oldman

New Mexico

Senior Member

Joined: 04/15/2001

View Profile


Online
Posted: 07/06/20 08:27am Link  |  Quote  |  Print  |  Notify Moderator

ncognet0 wrote:

I really like the idea and concept that its 100% powered by the sun. They even claim it can run the AC units/microwave/heater... everything.
They can claim whatever they want, but from my chair it's nonsense.

The sun doesn't shine all the time, and solar doesn't "run" things unless you have a backyard full of it. AC can run on batteries, for a short time, depending on the size of the unit.

ncognet0

Moab Utah

Full Member

Joined: 06/12/2006

View Profile


Offline
Posted: 07/06/20 08:33am Link  |  Quote  |  Print  |  Notify Moderator

Thank you and my thoughts are telling me the same, I love the idea of full solar it would be like being plugged in with the exception of a sewer dump.. We also have cloudy days. Ive thought about buying a small Honda generator solely for the purpose of charging the batteries. My gut feeling agrees with you though.

2oldman

New Mexico

Senior Member

Joined: 04/15/2001

View Profile


Online
Posted: 07/06/20 09:06am Link  |  Quote  |  Print  |  Notify Moderator

ncognet0 wrote:

Ive thought about buying a small Honda generator solely for the purpose of charging the batteries..
That's the way to do it.

Solar is wonderful..if... you have enough, and enough battery. It takes a lot of battery capacity and a big inverter to run microwaves and toasters.

Tom_M

New Hope, MN

Senior Member

Joined: 04/24/2011

View Profile


Offline
Posted: 07/06/20 10:23am Link  |  Quote  |  Print  |  Notify Moderator

Only $19,500.
From their website:

"Super SolarFlex™ package includes:

JABONI POWER PRODUCTS SOLAR PANELS

1,000+ watts of solar collection

60 AMP OF MPPT SOLAR CHARGING CAPABILITY

MPPT (Maximum Power Point Tracking) technology maximizes power under all conditions, collecting more energy from the solar array than standard PWM (Pulse Wave Modulation) systems

DRAGONFLY ENERGY™ GC3 LIFEPO4 LITHIUM ION BATTERIES

Two best-in-class lithium ion batteries delivering a combined 510 amp hours of storage. Lithium ion batteries last longer, provide 2-3X more usable power, and are 80% lighter than lead acid batteries. With Super SolarFlexTM, owners have the option to add up to 510 AH of additional storage post-purchase.
Designed and Assembled in the USA 3000-5000 cycles
Built in Battery Management System (BMS) monitors all operating conditions of the batteries to ensure they operate properly
Internal heating system allows cold temp charging at below freezing temperatures, enabling the battery to operate in any environment

FULLY ELECTRIFIED COACH WITH 3,000W MAGNUM HYBRID INVERTER CHARGER

Powers every outlet, every appliance, every system in your Montana
Dual, 50AMP pass-through transfer switch power what you want when you want, regardless of the available energy source (solar or shore)
Directs shore power to charge batteries until electricity is needed in the coach, then diverts current automatically

PRECISION CIRCUITS™ ENERGY MANAGEMENT SYSTEM

State-of-the-art load management system.
Prevents inverter overload by monitoring energy consumption and temporarily disabling non-critical circuits

ADDITIONAL SYSTEM SAFEGUARD

Precision Circuits™ Battery Guardian provides a second level of protection by disabling 12V circuits until adequate battery charge is achieved

VICTRON BMV-712 WITH VICTRON CONNECT

Battery load monitor and easy-to-use smart phone app provides real-time monitoring and reduces energy anxiety

Coleman-Mach Powersaver A/C with integrated soft-start

The power required for air-conditioner start-up is Achilles’ heel of advanced energy systems, so Keystone’s engineering teamed up with Airxcel to design a soft-start air conditioner for Super SolarFlex™. This model is the only UL-listed soft start system on the market today. Additionally, the Coleman-Mach Powersaver series delivers maximum cooling and uses up to 40% less energy than conventional RV air conditioners.

Super SolarFlex™ is available as an option on every Montana model, and has a MSRP of $19,500. If you have questions about this package, feel free to reach out to Key Connect Product Advisor or contact your local Montana dealer."



Tom
2005 Born Free 24RB
Towing 1978 VW Bug convertible
Minneapolis, MN


2oldman

New Mexico

Senior Member

Joined: 04/15/2001

View Profile


Online
Posted: 07/06/20 10:30am Link  |  Quote  |  Print  |  Notify Moderator

The power required for air-conditioner start-up is Achilles’ heel of advanced energy systems

Not really. A sufficient complement of batteries and a big enough inverter will start one easily. It's on generators where you have the startup problem. Generators cannot surge like an inverter with enough batteries.

The achilles' heel is keeping one running for 8 hours.

* This post was edited 07/06/20 01:23pm by 2oldman *

JKJavelin

Milwaukee, WI

Senior Member

Joined: 12/31/2016

View Profile



Good Sam RV Club Member

Offline
Posted: 07/06/20 11:18am Link  |  Quote  |  Print  |  Notify Moderator

Here's a biased review of the Montana Legacy with that solar package. He doesn't show a whole lot of the details about the solar, says he will in another video.
https://youtu.be/oEnvJR0LBlg

Nice rig.


2018 Ram 3500 Laramie Cummins 6.7
2016 Open Range RF316RLS
Titan Disc Brakes
Trailair pinbox
Morryde SRE-4000 w/ wetbolt kit
Demco Hijacker Autoslide 18k
570 watts of Solar

2017- 21 Nights
2018- 75 Nights
2019- 138 Nights
2020- 66 Nights

Tom_M

New Hope, MN

Senior Member

Joined: 04/24/2011

View Profile


Offline
Posted: 07/06/20 01:15pm Link  |  Quote  |  Print  |  Notify Moderator

Here's a link to the solar setup. Doesn't say much more than in the main overview:
https://www.youtube.com/watch?v=apeWU8CN_eU

jshupe

FT

Senior Member

Joined: 08/20/2016

View Profile


Offline
Posted: 07/08/20 05:44pm Link  |  Quote  |  Print  |  Notify Moderator

You would be better off spending $20K on your own setup. 1000W of solar and 510AH of batteries won't run your AC for any length of time, and if you attempt it, you won't be able to refill your bank in a single day.

My two Dometic rooftop AC units pulled 2.7kW combined when actively cooling (compressors on, fans on high) my 39' Alpine. That would drain a 12V/510AH battery bank in around two hours, and 1000W of solar won't quite fill that bank in a day under ideal conditions with no load. If the compressors only run 50% of the time, you might get four hours. The math used for these figures:

  • 12V * 510AH = 6120Wh, 6120Wh / 2700W = 2.26h, assuming no other loads
  • 1000W * 6 solar hours = 6000W, which is less than the 6120Wh size of the bank
  • You can generally expect 5-6 solar hours per day, depending on location and other factors
  • I did have someone tell me that two of those Mach units pull 2400W together, but haven't personally verified -- that doesn't buy that much extra time

You could, of course, only run one AC unit. Indefinite AC on solar does not work out with current solar technology and rooftop RV AC units, but can be done with mini-splits (that's a whole separate and far more major project). There simply isn't enough real estate on RV roofs to make the math work, and with more real estate, you need more cooling, which requires more energy, so the issue remains as you size up.

You can purchase 3-4x the solar and 3-4x the battery they are selling for $20K and have better quality components.

It's nice to see more than the conventional 200W systems, but this isn't enough to be self sufficient with all systems functioning on demand, and certainly doesn't justify the cost.

We have 2925kW of solar and a 48V battery bank that would be the equivalent of [email protected] Even with that, we had to move to mini-split AC units to be able to set the thermostat and forget about it. They use 1/3rd of the energy of the units they replaced, and perform a better job.

For what it's worth, we don't plug in, and only run the generator a few hours a month at most. We run everything as we please without worrying about consumption unless there are consecutive cloudy days. When those occur, we just make sure we have LP for the genset which is integrated to the rest of the system and starts automatically when certain conditions are met.

ncognet0

Moab Utah

Full Member

Joined: 06/12/2006

View Profile


Offline
Posted: 07/08/20 06:33pm Link  |  Quote  |  Print  |  Notify Moderator

Thank you, i found out today the batteries are only waranteed for 5 years. then it's at least 7k to replace them. my luck they would last 5 years and one day.

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 

Open Roads Forum  >  Technology Corner

 > Requesting your thoughts on Montana Super Solarflex system
Search:   Advanced Search

Search only in Technology Corner


New posts No new posts
Closed, new posts Closed, no new posts
Moved, new posts Moved, no new posts

Adjust text size:




© 2020 CWI, Inc. © 2020 Good Sam Enterprises, LLC. All Rights Reserved.