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PV solar Panel isolation

Webbix
Hi All

i have a job where the roofer wants to move some solar panels on a roof on some flats 4 sets of panels (for 4 flats) do some remedial works then refit. My question is if i lock off the DC isoator in each flat , do i also lock off the AC isolator for each falt as well . Also if the DC isolator is locked off what stops the roofer getting a schock directly from panel on roof ! appreciate some guidance

thanks in advance

Paul
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  • 0
    Where are the inverters - i.e. where do the DC lines from the solar panels go ?

    Indeed, all the time the sun is out, they should be treated with care, as the panel will be generating, regardless of what you switch off indoors.

    Normally on anything more than a very small installation, the solar panel DC cables  plug in somewhere, and may be interconnected in series strings, with special DC connectors that in effect shroud you from the terminals  from both directions.  These are the safest place to disconnect them ( when you do, please label and maybe photograph first as there are many variations)


    Do not be tempted to cut a cable or create a new joint while the panels are illuminated - even an overcast day can give a substantial open circuit voltage. If it is not connectorized then in effect a degree of live working may be  unavoidable, and your method of work needs to reflect that. Be aware that hopefully taping bits or cardboard to the panels will reduce the output, but  cannot always be done well due to the way things are assembled, and you do not want your cover blown off at the wrong moment...



    Store the disconnected panels out of sunlight if they have to be left with open ends disconnected.
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  • 0
    Where are the inverters - i.e. where do the DC lines from the solar panels go ?

    Indeed, all the time the sun is out, they should be treated with care, as the panel will be generating, regardless of what you switch off indoors.

    Normally on anything more than a very small installation, the solar panel DC cables  plug in somewhere, and may be interconnected in series strings, with special DC connectors that in effect shroud you from the terminals  from both directions.  These are the safest place to disconnect them ( when you do, please label and maybe photograph first as there are many variations)


    Do not be tempted to cut a cable or create a new joint while the panels are illuminated - even an overcast day can give a substantial open circuit voltage. If it is not connectorized then in effect a degree of live working may be  unavoidable, and your method of work needs to reflect that. Be aware that hopefully taping bits or cardboard to the panels will reduce the output, but  cannot always be done well due to the way things are assembled, and you do not want your cover blown off at the wrong moment...



    Store the disconnected panels out of sunlight if they have to be left with open ends disconnected.
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