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Solar panel question

Posted: 26 Jan 2024, 13:21
by Stesaw
Now this might be a stupid question and might be best to ask the manufacturer, but has anyone trimmed the edges of a solar panel? the flexible type that is. I've bought a second panel to go on the van. Same wattage, same company but annoyingly its a different size to the other one.

When I say trimming I dont mean the cells, just the plastic base.

I'm test fitting at the moment but as you can see from the picture its overlapping. Should I live with a bit of overlap on a panel? Image

Ps yes the roof is filthy and due a wash....

Re: Solar panel question

Posted: 26 Jan 2024, 13:48
by R0B
As no electricals go through the edges. I see no reason why you cannot trim them. Oh,and give that roof a scrub. :D

Re: Solar panel question

Posted: 26 Jan 2024, 17:23
by Mocki
You can trim , but dont go too close to the cells, especially with those fibreglass panels, they are prone to cracking anyway .
I would be tempted to only trim the inner where the two panels touch on one of them

Re: Solar panel question

Posted: 26 Jan 2024, 18:00
by Stesaw
Mocki wrote: 26 Jan 2024, 17:23 You can trim , but dont go too close to the cells, especially with those fibreglass panels, they are prone to cracking anyway .
I would be tempted to only trim the inner where the two panels touch on one of them
Thanks for the input chaps. Yeah that was my plan to just trim as little as possible so they fit comfortably on the roof. :ok

Re: Solar panel question

Posted: 26 Jan 2024, 19:34
by Mocki
What size are those panels , electrically ?

Re: Solar panel question

Posted: 26 Jan 2024, 19:53
by Rosie n' Jim
They look like my 130w eco-worthy panel.

Re: Solar panel question

Posted: 26 Jan 2024, 20:36
by Stesaw
Mocki wrote: 26 Jan 2024, 19:34 What size are those panels , electrically ?

 130W

Rosie n' Jim wrote: 26 Jan 2024, 19:53 They look like my 130w eco-worthy panel.

They are!

Re: Solar panel question

Posted: 26 Jan 2024, 22:35
by Mocki
Nice 130w @36v will do you well …..

Re: Solar panel question

Posted: 26 Jan 2024, 22:44
by Stesaw
My monkey brain recalls them being 24v panels .. but I doubt I'll get the factory rated outputs. If the weather is sunny tomorrow I'll have to have a play and see what I can get out of them. I've got some wiring to shorten and sort out.. and cut the edge on one at least.. :shock: 

Re: Solar panel question

Posted: 27 Jan 2024, 20:28
by Rosie n' Jim
I bought mine a few weeks back. Whilst trial fitting them, a gust of wind ripped it off the roof and cartwheeled it down the road. I have yet to test it fully, but voltage and current appear rather low.

Re: Solar panel question

Posted: 27 Jan 2024, 22:36
by Stesaw
Oh dear, well hope its OK. What sort of MPPT controller you have?

Re: Solar panel question

Posted: 27 Jan 2024, 22:54
by Mocki
So if they are 24v each that’ll be 48v at 130w , even better

Re: Solar panel question

Posted: 27 Jan 2024, 23:24
by Stesaw
Yeah hoping it will be all I need, once I get an inverter, new fridge etc etc etc :rofl

Re: Solar panel question

Posted: 28 Jan 2024, 08:40
by Rosie n' Jim
I use a Renogy Rover Li 40 Amp controller, usually fed by two 100W Renogy rigid panels. But the are mounted on a roof rack that prevents the fitting of my roll out awning. The plan is to use the flexible panel when the weather is good enough to need the awning. I suspect it will, if positioned well, produce nearly as much power as the other two flat on the roof.
I would like to be able to angle the rigids toward the Sun/South, but who knows which way the van will face when parked! 

Re: Solar panel question

Posted: 28 Jan 2024, 12:03
by Stesaw
Rosie n' Jim wrote: 28 Jan 2024, 08:40 I use a Renogy Rover Li 40 Amp controller, usually fed by two 100W Renogy rigid panels. But the are mounted on a roof rack that prevents the fitting of my roll out awning. The plan is to use the flexible panel when the weather is good enough to need the awning. I suspect it will, if positioned well, produce nearly as much power as the other two flat on the roof.
I would like to be able to angle the rigids toward the Sun/South, but who knows which way the van will face when parked! 

Thats the only problem with having them fixed to the roof you need to park so you can point them towards then sun! did that in scotland.. ended up parked with the roof facing away from the sun.. not that you could see it for most of the week :rofl