390 watt panels

I'd want to see a bit more certified proof of the technology before parting with my wonga.
I don't see how this reflected light actually reflects off the background unless the panel itself is clear/opaque... Which it isn't......the back of the panel is in shade of itself.
 
Its a big panel over 2x1 metres, do you have space for it, personally I would favour 2 smaller ones as I would worry about such a big expanse of glass getting bounced around but I might be over thinking this.

Martin
 
I can see a problem with the reflected light claim if you look under the panels after a few months there is always dirt and muck thus no white surface to reflect any light even if I does get in there and they claim this works well on cloudy days.(y)
 
Speve said:
I can see a problem with the reflected light claim if you look under the panels after a few months there is always dirt and muck thus no white surface to reflect any light even if I does get in there and they claim this works well on cloudy days.(y)
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They appear to be quoting 390W without any help from the rear - that's a bonus. If so it's a good price for 390W.

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Vans with that amount of free space are very very rare
 
I'm already suspicious that there could be any reflection under a 10mm air gap. It's sounding like snake oil and the 41V panel voltage looks very high for standard solar controllers
 
Stealaway said:
I'm already suspicious that there could be any reflection under a 10mm air gap. It's sounding like snake oil and the 41V panel voltage looks very high for standard solar controllers
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I'm thinking the same but mine has a 40mm gap.... It looks very dark under there even on a bright day.
As you say, snake oil for the unwary.

I watched a factual TV program about the making of a solar panel and It was said that the backing sheet on a regular panel must not be badly scratched or damaged so how can omitting it altogether be a good thing ?

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Techno said:
Messing around? or fitting what will fit.
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In your world as you see it (y)
In my world definitely it's messing around having to fit several panels rather than Bish Bash Bosh with one panel (n)
There is a good space at the back on our van but not measured yet !
Several panels does have the advantage in that if you get a failure at least it can be bypassed and not lose the whole array.
 
pappajohn said:
I'd want to see a bit more certified proof of the technology before parting with my wonga.
I don't see how this reflected light actually reflects off the background unless the panel itself is clear/opaque... Which it isn't......the back of the panel is in shade of itself.
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They are saying that the light does pass through the panels ?
It is LG so hardly some back street suppliers, they have won awards for it apparently.
https://www.solarchoice.net.au/blog/news/lg-introduces-bifacial-300w-solar-panel-090516
 
As said it’s a big bit of glass if the van twists and moves as it drives across a rally field, or vibration driving say on cruise control alone a concrete motor way would it resonate and cause it to crack.
 
I’ve never seen a motorhome with a clear space 2x1 meters so this will be interesting

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I bought my solar from Bimble , found them very helpful , and happy to discuss queries. They have been going a fair while , and have a lot of stock , seemed very busy when i collected my stuff .
I have 3x 260w (1700x 1000) panels in series , with 60amp Tracer Mppt . When i fitted new house batteries saw it reach 35amps input as it brought them up to full charge. Highest voltage 102v from panels. ( Not sure of relevance of those readings as not that knowledgeable about solar self taught) :)
@Basildog
 
Techno said:
I’ve never seen a motorhome with a clear space 2x1 meters so this will be interesting
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I didn't say it for a laugh as I have some idea of the available space, just measured roughly and it actually fits (y)
Available space is 2140 mm x 1350 mm
I have used house panels on other vans including a Swift kontiki and a Winnebago.
Still not sure if I want to rely on 1 panel .
 
With panels in series from what i understand one goes , takes down all others, unless you wire up in parallel , which needs multiple mppt controllers. Good quality panels should last a long time , (tens of years) . I know some Bliss Mobiles goes with two equal systems , but that a 1.5kw system feeding Li ion , and its £120,000 for just the demount unit (no vehicle) :) @Basildog
 
My three x100 produce as witnessed up to 22.5 amps through my MPPT regulator
CA_02151313014332-XL.jpg

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Stealaway said:
I'm already suspicious that there could be any reflection under a 10mm air gap. It's sounding like snake oil and the 41V panel voltage looks very high for standard solar controllers
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SNAKE OIL!!! I’d love to get some of that for my ills,,, how much is it? Lol
 
tonyidle said:
Mine has - I'm about to fit a single 250W panel.
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Are you ready for the regulator yet? I have 16th noted on it.

Beware a nice dollop of seagull shit or autumn leaves can put a big dent in a single panels output
 
Techno said:
Are you ready for the regulator yet? I have 16th noted on it.

Beware a nice dollop of seagull shit or autumn leaves can put a big dent in a single panels output
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16th still good - I have a reminder set to remind you. Thanks for the reminder :D. Seagull shit covers more than panels. I have the results of 5 weeks on the road to prove it.
 

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