Good Sam Club Open Roads Forum: Setting up Solar on my Moho
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 > Setting up Solar on my Moho

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mountainkowboy

Socal/NE Oregon

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Posted: 12/07/21 04:47pm Link  |  Quote  |  Print  |  Notify Moderator

This is my plan;

07 Tiffin 30DA, basically stock with 2 12v 100ah batteries. It had 2 6v's in it when we got it.... but they were toast, and these were almost new and free.

As I understand it... (could be completely wrong) by going to lithium batteries I save weight and get farther draw down than flooded, thus increasing my available ah's.

I plan on running 6 125watt flexible panels on my roof, and replace the batteries, and inverters with newer tech that marries with the solar system. My quandary is do I stay 12 volt and do more batteries. Or bite the bullet and go high voltage trying for better efficiency.

The end goal isn't to be able to reliably boondock and run the coach. I'm not interested in being able to run my roof top AC, I have a gennie if I need it.


Chuck & Ruth with 4-legged Molly
2007 Tiffin Allegro 30DA
2011 Ford Ranger
1987 HD FLHTP


corvettekent

Marysville, WA

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Posted: 12/07/21 05:41pm Link  |  Quote  |  Print  |  Notify Moderator

How much does your Tiffin weigh? I don't think that the savings will matter.
I would stay away from the flex panels and install 5 or 6 200 watt panels, or 3 350 watt panels.
I would stay with a 12 volt system.


2022 Silverado 3500 High Country CC/LB, SRW, L5P. B&W Turnover Ball, Companion Hitch.

2004 32' Carriage 5th wheel. 860 watts of solar MPPT and four 6 volt batteries. Samlex 2,000 watt Pure Sine Wave Inverter.


TechWriter

Part-Timing Again

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Posted: 12/07/21 06:04pm Link  |  Quote  |  Print  |  Notify Moderator

Instead of pre-selecting panels and making them fit, select panels to maximize your roof area. You want as much wattage as possible because of the numerous factors that lower PV output.


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KD4UPL

Swoope, VA

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Posted: 12/07/21 07:07pm Link  |  Quote  |  Print  |  Notify Moderator

I wouldn't mess with little 125 watt panels unless that's all you can make fit. Larger 300 to 400 watt panels are much less expensive, easier to find, and easier to wire up.
If you're planning on even a medium size system I would go 24 volt minimum but 48 volt would be the best choice. You can just use a 48 volt to 12 volt converter to keep your factory 12 volt systems powered.

2oldman

Nevada

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Posted: 12/07/21 09:16pm Link  |  Quote  |  Print  |  Notify Moderator

I'm 48v. It's nice not having to deal with big fat wire.

Lwiddis

Near Bishop, California

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Posted: 12/08/21 08:12am Link  |  Quote  |  Print  |  Notify Moderator

If your current batteries are sufficient, why change them out until they start to fail?
Yes, large size wire needed for a 12 volt system is more cumbersome but once it’s installed, it doesn’t matter.


Winnebago 2101DS TT & 2020 Chevy Silverado 1500 LTZ Z71, WindyNation 300 watt solar-Lossigy 200 AMP Lithium battery. Prefer boondocking, USFS, COE, BLM, NPS, TVA, state camps. Bicyclist. 14 yr. Army -11B40 then 11A - (MOS 1542 & 1560) IOBC & IOAC grad


mountainkowboy

Socal/NE Oregon

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Posted: 12/09/21 09:09pm Link  |  Quote  |  Print  |  Notify Moderator

Thanks for the answers, still in the "planning" stage. Been doing TONS of research. Will be going over all systems next week and figure out what is in it to start with. This stuff aint cheap and I'd like to be able to run most everything but the AC off of solar. It looks like lithium is the way to go for batteries. Cost in the long run is cheaper than wet batteries. Still digging.

mountainkowboy

Socal/NE Oregon

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Posted: 12/09/21 09:11pm Link  |  Quote  |  Print  |  Notify Moderator

Lwiddis wrote:

If your current batteries are sufficient, why change them out until they start to fail?
Yes, large size wire needed for a 12 volt system is more cumbersome but once it’s installed, it doesn’t matter.


Have never done a test of how the present battery system holds up. But from past experience it won't make it through a cold night using the heater.

PerryB67

Lanesboro, Minnesota

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Posted: 12/10/21 09:41am Link  |  Quote  |  Print  |  Notify Moderator

Friends of our purchased a used 28' Tiffin two years ago. It was massively upgraded. I know they have four Lifeline AGM's in one bank with 600 watts on the roof, and another bank with another four Lifeline batteries charged by 400 watts on the roof.

They sent me the ad and asked if it was a good buy. I responded that if they didn't buy it within 24 hours we would. I believe it has the same wheelbase as our F150 and turns on a dime.

Food for thought,

Perry


2018 Escape 5.0
2019 F150 Max Tow, Max Springs, 3.5 EB Quad Cab
Victron 712, Victron 100/20, Victron 100/30
GoPower 170 watt, and three Renogy 100 Compact watt panels, all in parallel
260 ah Soneil SiO2 batteries


OkieGene

oklahoma city

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Posted: 12/10/21 10:55am Link  |  Quote  |  Print  |  Notify Moderator

Never mind. whoops.

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