Two weeks off the grid with Renogy - Page 2 - Fiberglass RV


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Old 07-23-2016, 06:52 PM   #15
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Name: Gordon
Trailer: Scamp (16 Std Layout 4) with '15 Toyota Sienna LE Tug
North Carolina
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Originally Posted by Backwater Bill View Post
I had 30 watts on a home made stand and felt we could go forever. I'd position them to optimize exposure. I now have 150 watts fixed on the roof and it's not as good if I have to park out of the sun. I think I'd like to add a small portable panel.
Interesting conclusion.. I set up my system to have both a 50 or 100 watt roof panel AND a similarly sized portable. But I have found that (so far) the portable is all I want. 95% of the time the benefits that a roof panel provide would be keeping the battery topped off when not camping, or for charging while driving.

Therefore, I have not even installed the roof panel. I am now considering a very small (10-20 watt maybe) roof panel for battery maintenance when I am home and then just using a portable panel (that plugs into a socket I added near the umbilical cord entry) while camping.

I am still surprised that you got by with 30 watts.. I find that a 50 watt panel is enough if I am in good sun in summer.. a 100 watt panel is better for shady spots and/or times of year with less sun. And of course that is with limited power use, all LED lights, etc.
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Old 07-23-2016, 07:17 PM   #16
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Name: Bill
Trailer: Escape
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Originally Posted by gordon2 View Post

I am still surprised that you got by with 30 watts.. I find a 50 watt is enough if I am in good sun in summer.. the 100 watt panel is better for shady spots and/or times of year with less sun. And of course that is with limited power use, all LED lights, etc.
I am surprised at how much power most folks seem to need.

I had 50 feet of cable divided between 15' and 35' sections to minimize the length of the run.

We are very frugal and used all LEDs.

In addition to the lights we used a little exhaust fan, some water pump, and a bit of furnace in addition to a 12v CPAP every night for 8 hours.
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Old 08-11-2016, 10:39 AM   #17
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Name: Larry H
Trailer: Trillium
Arizona
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OOPS!!!

Hi Timber Wolf,

You are correct... Trojan SCS225 is 130AH at 20 hr rate.
Sorry about the poor proof reading. However, this battery
has served well and probably has never been discharged
more than about 50-60%.... Of course 2 T-105s is a better
solution but the extra 68+ pounds on the tongue was more
than I wanted. I have the T-105s in the large 5th wheel
trailer that I live in full time and have found them to be
durable and more than adequate for that application =
much better than the two inexpensive 12v in parallel that
came with the trailer. If I get a larger "small" trailer and
stronger tow vehicle I would definitely go with the superior
setup of the two T-105s 6v batteries in series.

Larry H
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