Skip to content
View in the app

A better way to browse. Learn more.

Power Forum - Renewable Energy Discussion

A full-screen app on your home screen with push notifications, badges and more.

To install this app on iOS and iPadOS
  1. Tap the Share icon in Safari
  2. Scroll the menu and tap Add to Home Screen.
  3. Tap Add in the top-right corner.
To install this app on Android
  1. Tap the 3-dot menu (⋮) in the top-right corner of the browser.
  2. Tap Add to Home screen or Install app.
  3. Confirm by tapping Install.

Inverter Neutral Earth bonding

Featured Replies

  • Replies 200
  • Views 56.8k
  • Created
  • Last Reply

Top Posters In This Topic

Most Popular Posts

  • As another electrically inclined South African looking to stave off loadshedding and reliance on the incumbent utility, I also find myself trying to make sense of the Earth-Neutral bonding story

  • We have been around the block so many times regarding permanent neutral earth bonding. It is not allowed and is dangerous. A TN-S system shall not be converted to a TN-C system and all installations d

  • The E/N bond is only done at the inverter wires and it can be a relay in a DB. It is essential that this bond is only in place when running from battery. It is thus not a permanent bond. 

Posted Images

7 minutes ago, BritishRacingGreen said:

Ok, with relay still out, switch the grid supply on and test for 220vac across A1 and A2. 

Yup 230 across A1/2 relay out

2 minutes ago, Eurard said:

Yup 230 across A1/2 relay out

Ok with no cables yet on the klippon terminals :

1 switch grid off

2. Insert relay. Relay is supposed to have a LED.  Relay should be down (off) 

3. Switch grid on. Relay should be up (on). 

4. Now check for continuity with meter between klippon terminal N and E. There should be none. 

5.switch grid off

6.Now check for continuity with meter between klippon terminal N and E. There should be close to 0 ohm (short) . 

 

3 minutes ago, BritishRacingGreen said:

Ok with no cables yet on the klippon terminals :

1 switch grid off

2. Insert relay. Relay is supposed to have a LED.  Relay should be down (off) 

3. Switch grid on. Relay should be up (on). 

4. Now check for continuity with meter between klippon terminal N and E. There should be none. 

5.switch grid off

6.Now check for continuity with meter between klippon terminal N and E. There should be close to 0 ohm (short) . 

 

100% as per above on everything

This post was recognized by Energy-Jason!

BritishRacingGreen was awarded the badge 'Superstar'

"25"

2 minutes ago, Eurard said:

Okay I assume one last step.

Neutral from inverter to klipons and from klipons to load neutral bar

Yes, but one last test for safety and the good order:

1. Switch grid off and measure between A1 and A2 that there is nothing. 

2. Test for continuity between A1 and klippon L, N and E respectively. You should have open circuit. 

3 repeat test 2 but from A2 terminal. 

If all goes well, conclude by wiring in your inverter output and load netral and earth. Remove relay while doing so. 

4. Switch inverter on and test if your loads respond.

5.insert relay. 

6 switch on grid

7. Di your bonding test when both in grid and islanding mode. 

8 have beer

1 minute ago, BritishRacingGreen said:

Yes, but one last test for safety and the good order:

1. Switch grid off and measure between A1 and A2 that there is nothing. 

2. Test for continuity between A1 and klippon L, N and E respectively. You should have open circuit. 

3 repeat test 2 but from A2 terminal. 

If all goes well, conclude by wiring in your inverter output and load netral and earth. Remove relay while doing so. 

4. Switch inverter on and test if your loads respond.

5.insert relay. 

6 switch on grid

7. Di your bonding test when both in grid and islanding mode. 

8 have beer

Dude you are a BLOODY legend! I will drink that beer with a smile!

I will finalize, need to go get some lesser sized wires, for final step. I have enough for Inverter to kilppon but need from klippon to Load neutral bar.

 

I cannot thank you enough and with your blessings I will make a slide that details these steps for other users and future use.

My setup is quite unique as well as my mains ac goes to a breaker, then through a smart switch, then through a over under breaker and then to inverter.

The AC from mains to A1 and A2 was taken from output of the over under, so that it incorporates all protective devices. I have so much protection it isnt even funny lol.

31 minutes ago, Eurard said:

Dude you are a BLOODY legend! I will drink that beer with a smile!

I will finalize, need to go get some lesser sized wires, for final step. I have enough for Inverter to kilppon but need from klippon to Load neutral bar.

 

I cannot thank you enough and with your blessings I will make a slide that details these steps for other users and future use.

Thanks, if you create a nice slide thats wonderfull. We are here to support and share, thats the spirit. 

4 hours ago, PsyCLown said:

Sorry to hijack this thread, but would one require the neutral earth bonding box for a Growatt or Luxpower inverter?

I don't know the Growatts or LuxPower , but if it is reasonably late models , then I will be surprised  if they haven't got internal bonding. The last two generations of Axperts have built-in bonding arrangements .

There is a quick-and-dirty way of gauging whether there is built in bonding .Remove all wires from the input and output terminals , switch the inverter off , and measure for continuity between input neutral and output neutral .  If there is none then measure for continuity between output neatral and inverter earth terminal . If there is continuity then there exist internal bonding. 

But this must be functionally verified in the final analysis , by using a plug tester on the inverter load output . The test button button on RCD is not good enough , because it does not prove earth leakage , only residual current. The plug tester is a must.

On 2023/06/17 at 7:44 PM, BritishRacingGreen said:

I don't know the Growatts or LuxPower , but if it is reasonably late models , then I will be surprised  if they haven't got internal bonding. The last two generations of Axperts have built-in bonding arrangements .

There is a quick-and-dirty way of gauging whether there is built in bonding .Remove all wires from the input and output terminals , switch the inverter off , and measure for continuity between input neutral and output neutral .  If there is none then measure for continuity between output neatral and inverter earth terminal . If there is continuity then there exist internal bonding. 

But this must be functionally verified in the final analysis , by using a plug tester on the inverter load output . The test button button on RCD is not good enough , because it does not prove earth leakage , only residual current. The plug tester is a must.

Thanks, will give this a try when I get my install done.

Appreciate the info and assistance.

 

On 2023/06/17 at 5:51 PM, Scorp007 said:

With the help of someone who has a Growatt it seems both do have internal bonding. 

@zsde

That is good to know, makes life easier and simpler :D 

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

Account

Navigation

Search

Search

Configure browser push notifications

Chrome (Android)
  1. Tap the lock icon next to the address bar.
  2. Tap Permissions → Notifications.
  3. Adjust your preference.
Chrome (Desktop)
  1. Click the padlock icon in the address bar.
  2. Select Site settings.
  3. Find Notifications and adjust your preference.