Discuss help please reduced output on hot days in the Solar PV Forum | Solar Panels Forum area at ElectriciansForums.net
Fault list so far in your system;
Hanger bolts ( not recommended for slate)
DC cables not secured
strings wired incorrectly
inverter boxed in
not the best panels
can not see any earth cables on array ( legal requirement with velux windows)
I am sure there many more, I feel you did not choose your installer wisely, I am sorry, but I do not have the answers for you to correct all of this.
the windows should be easily removable, there's a catch on each side, then you can just slot them out.lol it have to be a pritty thin and small lecky to fit through one of those windows lol
there really is only any need to bond them if they are also an extraneous conductive part - ie if there is already conductivity to earth from the frame, which nobody can know for sure unless they're tested, otherwise no bonding is needed.why are they not the best panels and can you show the regs on velux windows earthing arrangement the world has gone mad with bond this bond that.
it looks to me as though you will almost certainly get some shading off the mains cables (with the shrouds off!)
Those look as though they could well be more than 200mm off the roof.
Slightly OT, but is the 200mm requirement before you need planning permission measured from the roof to the underside or top surface of the panel?
@billybee, slates cannot be lifted either to install brackets, they have to be ripped out, slots cut out, flashing installed and secured with hooks. Yours look like Eternit or silimar which tbh is the same principle as slate. The general concensus is that hanger bolts are not the best method for fixing to slate, primarily because they involve drilling a hole through every lap of slate which could lead to water ingress if over time the neoprene washer perishes or the nut beomes loose. They are designed for corrugated fibre roofs. I did try an experiment by fixing a hanger bolt to slate and running constant water over it. It didn't leak but wouldn't want to risk it over 25 years.
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