Results 1 to 3 of 3

Thread: Inverter fault levels

  1. #1
    Gold Member
    Join Date
    Mar 2022
    South Africa
    Thanked 22 Times in 21 Posts

    Inverter fault levels

    This is an interesting question, what is the fault level at the inverter when it switches over to battery backup, if you have one, 2 or 10 batteries connected.

    How do you work out the fault level when carrying out the inspection report for the COC?

    Lets say a you are using 5.2 kwh (48 VDC) batteries, in parallel.

    I am interested to see some of the calculations done by electricians who issue COC for solar installations.

  2. #2
    Gold Member Derlyn's Avatar
    Join Date
    Mar 2019
    East london
    Thanked 93 Times in 87 Posts
    Where on the test report would one enter those particulars ?

  3. #3
    Gold Member
    Join Date
    Jun 2017
    Port Elizabeth
    Thanked 215 Times in 182 Posts
    Your Fault level on the AC output will be the max peak output of the inverter which is anywhere between 1,5 to 2 times the rating of the inverter .
    The fault level is low.

    The DC fault level internally on the inverter is a different story - With Lithium the BMS will restrict the fault current.

    With Gel it takes a bit of calculation but is generally around 12 times the Amp hr rating

Similar Threads

  1. A new fault never experienced before.
    By Isetech in forum Electrical Contracting Industry Forum
    Replies: 7
    Last Post: 24-Jun-22, 12:26 PM
  2. [Article] The 7 levels of internet marketers..Where are You?
    By G Robin in forum General Business Forum
    Replies: 0
    Last Post: 19-Sep-10, 10:07 AM
  3. It's not my fault!
    By Dave A in forum South African Politics Forum
    Replies: 3
    Last Post: 09-Dec-08, 01:43 PM
  4. Increasing levels of legislation and regulation
    By Yvonne in forum South African Politics Forum
    Replies: 0
    Last Post: 30-Jul-07, 10:02 AM

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