Page 1 of 2 12 LastLast
Results 1 to 10 of 12

Thread: PV Suppliers?

  1. #1
    Gold Member Sparks's Avatar
    Join Date
    Dec 2009
    Location
    Port Elizabeth
    Posts
    902
    Thanks
    21
    Thanked 127 Times in 96 Posts

    PV Suppliers?

    Hi guys, does anyone know who stocks 16 and 25mm PV cables? Inverter max capacity is 80A and I will have 68A to connect between combiner box and inverter. A single cable from the combiner box inverter isolator will be neater than having all my strings cables in bigger trunking.

  2. #2
    Platinum Member
    Join Date
    Mar 2022
    Location
    South Africa
    Posts
    2,138
    Thanks
    57
    Thanked 101 Times in 96 Posts
    You dont need to use PV cables between the combiner and the inverter, the PV cables are double insulated for use on the roof.

    Just make sure the cable is suitable for the DC voltage.

    Quote Originally Posted by Sparks View Post
    Hi guys, does anyone know who stocks 16 and 25mm PV cables? Inverter max capacity is 80A and I will have 68A to connect between combiner box and inverter. A single cable from the combiner box inverter isolator will be neater than having all my strings cables in bigger trunking.
    Comments are my opinion, unless regulations are attached to support the comment. This is social media, not a court room.

  3. #3
    Gold Member Sparks's Avatar
    Join Date
    Dec 2009
    Location
    Port Elizabeth
    Posts
    902
    Thanks
    21
    Thanked 127 Times in 96 Posts
    Thank you Isetech, I did consider that but would like to use fire retardent cables if possible, the batteries and inverter are just below and should anything untoward occur, at least I would have tried limiting more damage. As it is, the terminals on the inverter were not exactly designed for 25mm cables which would be the correct size for 80A DC

  4. #4
    Platinum Member
    Join Date
    Mar 2022
    Location
    South Africa
    Posts
    2,138
    Thanks
    57
    Thanked 101 Times in 96 Posts
    IF you are concerned about fire, I hope you are not using PVC trunking as most domestic installations are done, I would be using metal trunking (P8 or 9000). Please tell me you combiner box is also metal, I hear all this talk about fires, yet 99.9% of domestic solar installations posted on social media use the dangerous home made DC PVCcontrol boxes.


    Quote Originally Posted by Sparks View Post
    Thank you Isetech, I did consider that but would like to use fire retardent cables if possible, the batteries and inverter are just below and should anything untoward occur, at least I would have tried limiting more damage. As it is, the terminals on the inverter were not exactly designed for 25mm cables which would be the correct size for 80A DC
    Comments are my opinion, unless regulations are attached to support the comment. This is social media, not a court room.

  5. #5
    Gold Member Sparks's Avatar
    Join Date
    Dec 2009
    Location
    Port Elizabeth
    Posts
    902
    Thanks
    21
    Thanked 127 Times in 96 Posts
    Quote Originally Posted by Isetech View Post
    IF you are concerned about fire, I hope you are not using PVC trunking as most domestic installations are done, I would be using metal trunking (P8 or 9000). Please tell me you combiner box is also metal, I hear all this talk about fires, yet 99.9% of domestic solar installations posted on social media use the dangerous home made DC PVCcontrol boxes.
    Yes, I agree, earthed metal boxes and conduit are the way to do it. I have not started the installation yet as I am first trying to get the cables I want.

  6. #6
    Platinum Member
    Join Date
    Mar 2022
    Location
    South Africa
    Posts
    2,138
    Thanks
    57
    Thanked 101 Times in 96 Posts
    For the record its not lithium batteries bursting into flames and burning down buildings, I hear the most common cause of fires in domestic installations are the home made plastic DC control boxes, full of 'imported" Dc components supplied and fitted by installers.
    Comments are my opinion, unless regulations are attached to support the comment. This is social media, not a court room.

  7. #7
    Platinum Member
    Join Date
    Mar 2022
    Location
    South Africa
    Posts
    2,138
    Thanks
    57
    Thanked 101 Times in 96 Posts
    Check the manufacturers spec sheet, these cables have a much better current rating than our standard house wires.

    Quote Originally Posted by Sparks View Post
    Yes, I agree, earthed metal boxes and conduit are the way to do it. I have not started the installation yet as I am first trying to get the cables I want.
    Comments are my opinion, unless regulations are attached to support the comment. This is social media, not a court room.

  8. #8
    Platinum Member
    Join Date
    Jun 2017
    Location
    Port Elizabeth
    Posts
    1,287
    Thanks
    36
    Thanked 310 Times in 261 Posts
    Quote Originally Posted by Isetech View Post
    For the record its not lithium batteries bursting into flames and burning down buildings, I hear the most common cause of fires in domestic installations are the home made plastic DC control boxes, full of 'imported" Dc components supplied and fitted by installers.
    Most burnt connections etc I have seen are bad workmanship , strands cut off before fitting into lugs , AC equipment used in place of DC , DC CB used on batteries and the CB are not bi direction but Bi Polar and fault levels not taken into account

  9. #9
    Platinum Member
    Join Date
    Mar 2022
    Location
    South Africa
    Posts
    2,138
    Thanks
    57
    Thanked 101 Times in 96 Posts
    you could add loose connections to that list.


    Quote Originally Posted by GCE View Post
    Most burnt connections etc I have seen are bad workmanship , strands cut off before fitting into lugs , AC equipment used in place of DC , DC CB used on batteries and the CB are not bi direction but Bi Polar and fault levels not taken into account
    Comments are my opinion, unless regulations are attached to support the comment. This is social media, not a court room.

  10. #10
    Gold Member Sparks's Avatar
    Join Date
    Dec 2009
    Location
    Port Elizabeth
    Posts
    902
    Thanks
    21
    Thanked 127 Times in 96 Posts
    Quote Originally Posted by Isetech View Post
    you could add loose connections to that list.
    I agree with both of you, another problem is also that people store paints and chemicals in their garage. Last week I worked on an installation where they had a setup installed last year and the people thought it a good idea to store corrosives beneath the inverter. Needless to say everything is corroded and they can kiss their warranty goodbye

Page 1 of 2 12 LastLast

Similar Threads

  1. [Question] Suppliers Invoicing
    By Saffiya in forum Accounting Forum
    Replies: 0
    Last Post: 27-May-15, 04:37 PM
  2. Motor suppliers
    By AndyD in forum Electrical Contracting Industry Forum
    Replies: 3
    Last Post: 14-Mar-13, 10:33 AM
  3. looking for cow hide suppliers
    By Niki in forum General Business Forum
    Replies: 0
    Last Post: 21-May-12, 01:36 PM
  4. [Question] Can't pay suppliers
    By Conan in forum General Business Forum
    Replies: 10
    Last Post: 22-Sep-09, 05:10 PM

Did you like this article? Share it with your favourite social network.

Did you like this article? Share it with your favourite social network.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •