Earth Neutral Bond

The training video shows a neutral bond with a 3.6 kW inverter.
The earth-neutral bond is important when used as a UPS because it changes the classification of the Inverter from a class 2 to a class 1 device

[@yusufkarriem1074]

Any reason why these inverters are not manufactured with a neutral bond relay internal

[@sharkfinn6469]

Because they rubbish. Deye is the same but why does it work better?

[@truplayez513]

These inverters should come with an internal relay for earth bond. It's ridiculous that it must be wired in after

[@r.h.5985]

Hi. I'm sorry but I don't understand why a tutorial video is done without "purely for demo purposes". It would be great if you voukd do a tutorial that shows exactly what should be done. I.e. useing an inline fuse in the demonstration. What size? Useing the correct cable? Again what size? I find the videos informative but I'm always left wondering more than I started. Maybe try and do the videos exactly as it should be done. That would be very helpful. Thank you

[@1001stmonkey]

He was only referring to the tiny little wires "purely for demo" LOL The video does show exactly what to be done.

[@freddiewithers9617]

I think the 5kw ECCO has the same contact configuration as well. It's really annoying though as this requires a NC contactor which will constantly dissipate ~4W. Why there is no 230V output which activates a NO contactor or better integrate a N-E bond is weird. The manual is inconsistent with this video (Page 17).

[@capailldubh]

So this is what we need to run safely totally off-grid? Best of luck with the op Keith. Got a hip done a couple of years ago. Great job.

[@paulfreeman5386]

👀

[@haniboueri4782]

recently notice that the neutral(N) wire that comes from load port has 110 voltage and the other line load (L) also have around 120 voltage, to my understand the neutral should not have voltage on it and the load should be on L only. Is this normal in my case or there is an problem with my inverter?

[@Dan-kg1ru]

Hi keith, like most people are mentioning and like most other manufacturers why isnt there a contactor built in. Secondly when are sunsynk going to make all inverters uniformed to eachother rather than having to have dry contacts in 3.6/5kw, hot contacts in 8kw and then in the three phase not needing either. Sunsynk are great at something but ignorant a lot of others. You should be asking electricians and installers what they think.

[@jcschwarb]

Hi Keith. Great video! When running parallel inverters, is it okay for each inverter to apply a Neutral-Ground bond in each inverter? My concern is arc fault, possible ground loops. My inverters apply NG bond when in DC modes (battery or PV), but not when AC input is energized as it is assumed (in the USA) that the NG bond is in the first means of disconnect after the meter. The vendor refuses to answer my questions/concern. Thanks in advance! -Jay

[@houseofancients]

good luck on your operation keitj

[@Dino_Bianchi]

How to choose the contactor? How many amperes must the contacts carry for a 8kW inverter: is just a reference to the earth or they should be rated at 40 A?

[@exshvezdickou]

What is the reason why this relay is not integrated? Do I need to add the same for 10kW three phase inverters?

[@tambo22003]

yes.

[@exshvezdickou]

@@tambo22003 actually no. 10kW inverters for EU market have this feature integrated, you can find the note in manual near schematics.

[@tambo22003]

@@exshvezdickou Nice to see a different variant on a different Market. :D

[@bassplaya69er]

@@tambo22003 other markets offten dont bother with earth

[@lulmaster635]

i have a question ,, do we need to bond the smart load neutral as well or just load side neutral earth bonding is enough?

[@andrekhoury6252]

so i wonder why u dont put it externally the contactor coil on grid line so will NO will be NC and earth to neutral will bond when no grid its open

[@NowWeComeAlive]

Normally Closed Contactor Terminal 5 is a neutral for the contactor coil Live wire from load live feeds the contactor coil A neutral from terminal 6 to the neutral for load which also goes to the top of the contactor An earth from the earth bar to the bottom of the contactor.

[@nicoverhoef7259]

With "signal island mode" one can use a normally open (NO) neutral earth bonding relay.

[@dannyjose6005]

To Steve and Keith, if I may, is your grid neutral and load neutral bonded at any point? My installation of 2x 5kw with 11kw/ 2 battery would trip the mains with a clear short/ arc on the master Inverter grid terminals about 30sec switched on for the first time. After a thorough inspection with the supplier technician, we found the Inverter load neutral terminal and grid live terminal ring out. AT THIS POINT THE SYSTEM WAS CONNECTED WITH THE CT and no external neutral bonding. I must mention the system worked fine on battery back up prior the dead short, ran a load @1.3kw the issue arrised -+ 30 sec after switching grid On. To my surprise during the inspection the technician suggested/ instructed me to bond output and input neutral BEFORE THE E/L and disconnect CT. According to his words " the is a build in check CT for feed back just get the Zero export on settings " Currently running and waiting on the replacement unit. My friend at the Muni was not happy when I told h this as we both know feed back or reference neutral is dangerous to when working on MV lines . I would like to rectify this but I'm a bit puzzled with the bonding story. Please assist where possible. Thanks

[@meinderthoving]

I don't understand your comment, but Keith did a better explanation here:kzbin.info/www/bejne/o4K1ZomBmdGmnqc&ab_channel=Sunsynk

[@crisssimpson7347]

what about 16kw as there is no ats or dry contact

[@martinvanbiljon4596]

It also has a dry contact like the 3.6kw. Which is the ats signal. Unfortumately i dont know what to do if there is a generator on site as well...

[@tanishqbhaiji103]

How much panels can the 6Kw single phase take on 1 MPPT trackers without the other having any?

[@tambo22003]

depending on the model, 6500W or 7800W worth of solar panels. A commerical pannel is about 300W on a good day, so about 20 per MPPT.

[@tanishqbhaiji103]

@@tambo22003 so like 100% input imbalance?

[@tambo22003]

@@tanishqbhaiji103 The MPPT's are independent. Do what ever you want, just don't over the voltage limit.

[@MrTrojantrdll]

Thanx

[@andriusst]

This this a very talented and technically skilled individual no doubt. However it is very apparent that there has been no preparation what so ever. Missing sockets, incorrect cables, repeating things like for demo purposes, etc etc. Minimum effort never come across as professional and just winging it will never be as clear and understandable as going from the script.

[@greenpro-greenproconsultin7420]

Why use the inverter to power a relay? Simply wire a relay into the DB.

[@jonerasmus9399]

Is there a circuit diagram available for this neutral and earth bond using a contactor . It's hard to see on the video what wires were put where

[@tanishqbhaiji103]

I could make one by hand if you want?

[@MSmith4X4]

@@tanishqbhaiji103 YES PLEASE !!!!

[@tanishqbhaiji103]

@@MSmith4X4 my drawing is bad and I will need some time but I will do it

[@MHBGT]

​@@tanishqbhaiji103 still waiting for your diagram. 😂

[@houseofancients]

this is only for the single phase, how about the 3 phase systems ?

[@tambo22003]

same, earth bond is needed.

[@truplayez513]

Check all the diy guys in comment's. You not going to be able to buy anymore from suppliers because you mess it up and then lodge warranty claims

[@garethevans1629]

Hi Keith, I had a 10Kw Sunsynk Inverter and Battery system (2 x5kw paralleled) installed for my house in South Africa. After a week one of the inverters failed and had something burning smell coming from it. The company that installed the system replaced the inverter as they thought it was a faulty inverter. almost two weeks later the new inverter failed exactly the same. The company that installed the inverter and the supplier came to my property to investigate. They said let's try get a bigger inverter so they removed both inverters and installed the 16kwa. Not even two weeks old the new 16kw inverter has failed and has burning smell coming from it! I have spent hundred of thousands of Rands and it keeps failing!

[@sunsynk]

What is the site name

[@sunsynk]

Sounds like a mismatch on the solar panels. If you give me the site name I can check everything

[@garethevans1629]

@@sunsynk The panels are all the same. they are Canadian Solar 450W panels, 12 of them. Site is in Kloof, South Africa

[@munniknieuwoudt1377]

I had the same problem. Blown 3 5kw inverters in 3 weeks time. Also burn smell. There was a damage light circuit cable. They used a earth as a neutral, but i am not sure if that was the reason to blow up the inverters. I have taken the whole installation apart. Still dont have a answer.

[@munniknieuwoudt1377]

I have 8 x 455W Canadian Solar panels. Megger and tested them all but cant find any fault. I have taken then down and going to test them with a 5kw Mecer inverter and see what happens. I think its the panels causing the problem.

[@shaunchetty4223]

That's why Victron is a superior inverter It has a built in programmable relay to bond output neutral to earth No additional wiring and relays required as per your video

[@bassplaya69er]

is that worth paying thousands extra?

[@Radu-11-11]

For a sistem with 12 kw recomand deye 12 kw inverter hibrid / 3 inverter I have electric heating vaillant 18 kw

[@guy7gsa]

Good video, but only 360p

[@steveharvey6841]

Hi Keith good luck with the op! Please can you answer my question from your book titled 'Earth bonding for dummies' I have a 8Kw inverter with 2 X 5.5 Kw batteries all working perfectly WITHOUT earth bonding, (No Panels, system used for load shedding) If I connect a relay strictly as per your instructions my ELU trips what am I missing????

[@tanishqbhaiji103]

ELU?

[@MHBGT]

​@@tanishqbhaiji103 Earth Leakage Unit. Basically the RCD, residual current detection device.

[@tanishqbhaiji103]

@@MHBGT you need to setup the delay time in the settings, as the relay is slow to switch and is triggering the RCD. I believe he has a video on this.

[@truplayez513]

That's one thing I like about Victron and that's all . They have an internal earth bond relay, fantastic

[@bassplaya69er]

at what price? is it worth paying thousands more for?

[@Dc_tech386]

So that’s a high frequency inverter right no iron core heavy transformer