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Old 11-11-2015, 05:44 PM   #11
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Looks good. Thanks for the pics!
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Old 11-11-2015, 09:12 PM   #12
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roaddiva,
Looks great! I just saw in the other discussion you used extra strength double sided sticky tape. Looks like a clean and easy way to mount the solar panels.
Thanks,
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Old 11-12-2015, 01:43 PM   #13
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How did you attach the panels to the roof? Did I see something about double stick tape? Has anyone gone through a camping season with a tape type mounting? Do the panels bend with the roof? So many questions in my mind..... Had a factory mounted panel on our previous TT and liked it a lot. Considering panels for our new TT.


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Old 11-12-2015, 02:41 PM   #14
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Yes I used double sided extra strength tape....did the same on my Lance camper, panel has been up there for years, no problem!
My panels are almost laying flat, it seemed closer to the edge the better. I taped the edges that are flat on the roof, most of both ends and the side away from the edge. This way water will not go inside/under the panel.
The side that is not flat on roof has maybe a 1/4" gap. I may just stick some weather striping in there.
With the sun not even directly over the panel I am pulling 1.3A, panels are total 200W so is that like 14V?
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Old 11-12-2015, 06:26 PM   #15
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With the sun not even directly over the panel I am pulling 1.3A, panels are total 200W so is that like 14V?
You can't use the amps to figure the voltage using the watts UNLESS you know the panels are putting out 200 watts, which you don't. (W = I x V; you need to know 2 of these values in order to calcuate the 3rd. The problem is that the 200 W value assumes full sun dead on, AT BEST; you already know you don't have this).

So you need to measure the voltage AND the current to know what kind of power your panels are putting out. If you measure it and it's, say, 14V, then 14Vx 1.3A = 18.2 watts. So either your voltage is VERY HIGH(doubtful), or you're not really getting a lot out of your panel under the conditions you have.
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Old 11-20-2015, 04:12 PM   #16
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One more update!! My controller shows amps coming in from the panels so I added a little volt meter to the panel side. Picture shows 19.2v coming in. I am hooked up to shore power and my batteries are full. But love this little meter!!

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Old 11-20-2015, 06:00 PM   #17
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One more update!! My controller shows amps coming in from the panels so I added a little volt meter to the panel side. Picture shows 19.2v coming in. I am hooked up to shore power and my batteries are full. But love this little meter!!

So you're getting about 1.1 amps x 19.2 vdc = 21.12 watts, or about 1/10th of what the panels are supposedly rated for. With the voltmeter added, you can now really monitor what you're getting from the panels.

I don't understand why the manufacturers don't add the voltmeters, or better yet, a wattmeter. (On the other hand, I do understand: It's my opinion that there's a lot of hype related to these solar panels, and that they don't really put out what they're rated for, or at least not for long; the average bloke hooks them up and is happy just seeing amps, but if they knew the true wattage, and that it didn't match what they thought they were buying, they might not be so happy.)

I also wonder what putting 19 vdc on the batteries is doing to them.
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Old 11-20-2015, 06:04 PM   #18
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I don't totally agree.....I think you can get close to what they say if you are in direct sunlight and your panels are clean.
The reading in the picture is not in direct sunlight. So I think it's not too bad.
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Old 11-20-2015, 06:08 PM   #19
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Only time will tell.

Some folks won't really be critical of their investment, as they've spent a lot of $$$ and don't want to admit in public that it didn't work out as well as they'd expected.

So let us know how it goes!
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Old 11-20-2015, 06:12 PM   #20
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Mine didn't cost that much and this is not my first solar experience. My last camper had 120W and it did fine. Now I have 200w and I can see already I am getting a lot more "juice" then the 120w.
The true test will be a boondocking trip, then I can tell you more.
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