Warning: Flat/flexible solar panels.
- Thread starter Gromett
- Start date
Steve N Tracy
LIFE MEMBER
I understand you have to fit them with a air gap ? that's what the manufacturer said, when I fitted them I fitted spacers and just stuck down the edges.
- Sep 23, 2013
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The newer CIGS flexible panels should avoid this problem. They don't generate as much heat & don't need an air gap.
CIGS=Copper Indium Gallium Selenide
I haven't done a full price comparison, but I do know that they are more expensive than traditional flexi panels. But a bit like lithium batteries - if they cost twice as much but last three times as long, then they are cheaper over the long term. Traditional flexi panels are notorious for their short life span.
The main use case for flexible panels is on campervans with pop top roofs, where weight is the main consideration.
More info here.
CIGS=Copper Indium Gallium Selenide
I haven't done a full price comparison, but I do know that they are more expensive than traditional flexi panels. But a bit like lithium batteries - if they cost twice as much but last three times as long, then they are cheaper over the long term. Traditional flexi panels are notorious for their short life span.
The main use case for flexible panels is on campervans with pop top roofs, where weight is the main consideration.
More info here.
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At current technology, CIGS or SunPower are the best flexible cells.
I have been telling this for a long time.
And on another note: how many in here has correctly fused the panels using proper ultra fast blow gPV fuses? Many think a panel is to small to create a fire, but, i have been to jobs where the panel's completely burned, and melted the renusol console on the roof, with scorch marks on the felt that needed replaced. That was because the failing panel was in a string with no fuse. Well doggy.
I have been telling this for a long time.
And on another note: how many in here has correctly fused the panels using proper ultra fast blow gPV fuses? Many think a panel is to small to create a fire, but, i have been to jobs where the panel's completely burned, and melted the renusol console on the roof, with scorch marks on the felt that needed replaced. That was because the failing panel was in a string with no fuse. Well doggy.
Someone on here has done exactly the same taping down the edges too, only the other week, hope they see this….
Jim
Ringleader
Sorry mate, videos with covers like that just don't deserve to be watched. Life's too short.
Two on Tour
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- Sep 16, 2016
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Being aware of failures of semi-flexibles due to overheating when bonded to a roof with no air gap for cooling and along with the expansion and contracting of the panels causing conductor joints to fail, I went for mounting my two semi-flexible on lightweight multiwall polycarbonate roofing sheet which gives stiffness to the panel and also allows airflow to dissipate heat away from the panels. Each panel is secured to the roof in six places on 18mm thick mountings.
They have been up there for 4 and a half years now and neither has failed, so either I'm just lucky or my mounting method is keeping them alive.
They have been up there for 4 and a half years now and neither has failed, so either I'm just lucky or my mounting method is keeping them alive.
Gellyneck
LIFE MEMBER
Not to do with fire but there was flexible panel at side of A30 this morning!
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I have used 'stick down' panels on two occasions. Both installed according to the instructions and both worked well UNTIL
1st set installed on metal roof of a narrowboat - when removed the area underneath the panels was a rust bucket. Damp and heat had ruined the paintwork and generated a penetrating layer of rust.
2nd one on the roof of our motorhome - when removed the heat generated had 'toasted' the gelcoat from a pale cream to a dark brown, very unsightly and difficult to restore.
Now, would only use framed panels with sufficient air space underneath for ventilation and heat dissipation.
1st set installed on metal roof of a narrowboat - when removed the area underneath the panels was a rust bucket. Damp and heat had ruined the paintwork and generated a penetrating layer of rust.
2nd one on the roof of our motorhome - when removed the heat generated had 'toasted' the gelcoat from a pale cream to a dark brown, very unsightly and difficult to restore.
Now, would only use framed panels with sufficient air space underneath for ventilation and heat dissipation.
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