solar panel testing help?

[gordysolar]

hi id like bit of help if anyone can help me this is my first post i have my mcs assesssment on the 1st november have doen a 2 panel install on my garage 2x sharp nu 245w schuco mounting system with a soladin 600 inverter

when doing insulation testing on panels do i megger it with panels connected + to earth and - to earth ? and on 250volts

also my generation meter is fitted before ac isolator in garage as my nic training notes show. Can the meter go between the ac isolator and inverter ?

whats easiiest tool to use to get the solar shading ?
And finally when measuring the temp for test conditions do i measure air temp or panel temp with my thermometer?

 

[Worcester]

You shouldn't need to insulation test the panels.

You need to test the DC insulation in accordance with the DTi Guide Home (United Kingdom) - Energy Saving Trust (Appendix C "Field insulation test procedure" )

Meter position, the DTi Guide shows an EXAMPLE of a meter position, some inspectors treat that (incorrectly) as a directive. It depends which isolator you are talking about, and depedning upon the location of the inverter, it hence depends upon how many isolators you have. Our practice is: Incoming=>MainSwitch=>MCB=>LockableIsolator=>Meter=>LockableIsolator=>Inverter as per the Dti Guide page 8
though also acceptable should be:
Incoming=>MainSwitch=>MCB=>Meter=>LockableIsolator=>LockableIsolator=>Inverter
If you feel REALLY confident in the understanding of the regulations
Incoming=>MCB=>Meter=>LockableIsolator=>Isolator=>Inverter

Solar Shading, - A series of photographs taken at intervals during the day is about the simplest you can get.
(just hope it's sunny on the day you take the photos )
The temperature is the panel temperature. (Infra red thermometer is easiest to use, though a contact probe will do fine)