750 Watt Flexible Solar Test - Ford Transit USA Forum
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post #1 of 14 (permalink) Old 05-25-2019, 12:18:PM Thread Starter
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750 Watt Flexible Solar Test

came across some 125 watt Flexible solar panels local -
Craigslist
Panels are 14 inches X 8.5 ft long - X thin
Panels were $56 each - purchased 6 - $335 total -

panels are 34 volt each so can be used to charge my
2 X Tesla model S battery bricks - @24 volt

Tested a couple panels and got 90 watts each @30 volts ish -
Published specs appear to be close to true -


panels weigh 6 pounds each and have a Super sticky adhesive on back side -
These are made in USA - by MIASOLE -
there were made for install on Tall Lip metal roofs -
Panels Look to be High Quality / Well made -

Shading seems to affect output Very little -
less shading effect than other panels I have tested -

panels can be walked on when installed on flat surface
and can be Rolled UP - Nice -

I already have 360 watts of solar installed so Im thinking
of using these panels for Ground Deployment -

Panels are New and supposedly made in 2017 -
Could be box looked pretty new also -

I came up with a couple of ways to carry/ store these -
first idea was to use the same Rack Idea I used for Under van storage-
(See my thread Under Van Storage )

Under van storage will work but after messing around with the
panels for a while I decided to Roll them up and use a wood Clip
to hold panels coiled up -

Works better than I expected and may make it so all 6 panels
coil into One bundle -- ( 40 pounds )

at the moment I have them rolled in groups of 3 -

also considered mounting a rack on side of roof that could be raised
and lowered for easier storage of panels -


Im going to go with Easiest storage -
Rolled panels will fit under my bed so that is what Im going to do-
also found a bag that rolled panels fit in - Nice

Think Im going to cut off MC4 connectors and put something else
like a XT90 with flexible wire
( I dont like the stiff cables or MC4 connector's)

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post #2 of 14 (permalink) Old 05-25-2019, 12:24:PM
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Nice find and will be interesting to see how they work out for you.
Does repeatedly rolling and unrolling stress the solar cells, or is it ok to keep doing that?
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post #3 of 14 (permalink) Old 05-25-2019, 05:16:PM
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I was planning on mounting my flex panels on some thin plywood, and storing under my mattress, but yours are pretty long. None of your pictures are showing up? The plywood mounting was so that they could be stood up and placed in an angle.

2019 T250 148 HR Ecoboost Cargo, Quadvan 4x4 with Eaton Trutracs, VanCompass hitch receiver and skid plates, Smittybilt 15.5k winch, KO2s
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post #4 of 14 (permalink) Old 05-25-2019, 06:30:PM
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These look like the Unisolar panel that I put on a camper a handful of years ago. Those were 12" x 9' but only had 65W. Your are much more efficient.
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post #5 of 14 (permalink) Old 05-25-2019, 10:05:PM Thread Starter
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from the info i could find on these they can be rolled up with out damage -
has a layer of stanless steel foil with several layers of Sputtered on materals -

busides being flexiable the main advantage of these are
low shading losses and low materails cost because of very thin layers of materails
used in manufacturing-

like most solar these used to be $pendy panels-
there was around 8 companies that made similar designed panels

I have a Lensun flexiable 80 watt panel that stores flat under bed mattress -
its a good spot to keep smaller panels -

3 yrs ago Lensun panel cost $300 for 80 watts
now lensun cost $200 so price has plummeted -

the Miasole panels could work well for someone who needed stealth
roof panels they are Very thin around 4 mm -
or doing ground deployment like me -

the man selling them has several hunderd of the new panels and
sells them in lots of 5 panels
Look on Craigslist in Austin TX under solar
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post #6 of 14 (permalink) Old 06-21-2019, 03:38:PM Thread Starter
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hooked up 3 of these panels to Tesla battery and
panels and max output 360 watts -
that is only 5 watts less per panel than the listed output - Nice

[IMG][/IMG]
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post #7 of 14 (permalink) Old 06-25-2019, 12:48:PM Thread Starter
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flex panels have been very good so far -

2 days ago had sky with clouds and also spots of clear sky
panels output jumped to 390 watts at times -
that is 15 watts higher than rated for -

think this happened because of Cool temperature with cloud cover
then when clear sky happened output jumped till panels warmed up -

these are the only panels that I have had that were actually close to
the listed max output-

other panels have only put out 70 to 80% of listed output -

panel seller sold out of several hundred panels in a week ish -

he may be getting more at some point he says -
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post #8 of 14 (permalink) Old 06-25-2019, 07:26:PM
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Quote:
Originally Posted by GROOVY2 View Post
came across some 125 watt Flexible solar panels local -
Craigslist
Panels are 14 inches X 8.5 ft long - X thin

...

Think Im going to cut off MC4 connectors and put something else
like a XT90 with flexible wire
( I dont like the stiff cables or MC4 connector's)
Sounds like a nice find! I'm always on the lookout for high output flexible solar panels.

I'm not a fan of MC4. For permanently mounted, single panel installs, we cut the connector off and use adhesive lined heat shrink butt connectors. For portable panels, I think or Anderson Power Pole connectors would work well.
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post #9 of 14 (permalink) Old 06-26-2019, 03:10:PM
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Garage
I was just wondering if you have tried to test the effects of different backing surfaces? I had read that if you applied these to say the roof of the van that the output would drop due to the high heat and no way for it to escape.

Bob in the ATX
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post #10 of 14 (permalink) Old 06-27-2019, 01:51:PM Thread Starter
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Hi Bob

mostly it would depend on the color of your van -
but cooler panels of Any type do output more power - somewhat -

I have tried water cooling panels and it dose out put more power
but not as much as expected and it was not worth the effort -

panel attached directly to roof of white van would draw heat from panels and put Into van roof-
lowering temp of panels-

Dark color van temperature difference would be less and there would be little effect on output
of panel -

For me Heat inside my van is a bigger problem than panel output -
attaching panels to van metal just put more heat into my van something I dont want -

In cooler climate areas this is not as much of a problem as in TX

a good way to see effect of color on temperature is to use a IR temperature gun and measure
the trunk area temp of cars parked in a parking lot -

white color cars will max out around 107F
just about every other color will be in the 135 to 145F range-

My van Was dark red and I have measured temp inside van as high as 142F
painted my van white now its more in the 89 to 115 range
Much nicer -
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