Grounding EDECOA inverter

Troubleshooting an open ground fault when testing a 3500 watt pure sign wave power inverter (model DPP35) hooked up to a 12 volt battery bank. Follow along as I perform various tests including earthing with the houses utility ground. I also take a look at the circuit board to make a few discoveries and perform similar tests on two other smaller inverters - CENTECH 400 Watt Modulated power inverter (Harbor Freight item 61479) and SUNFORCE Pro Series 1000 watt pure sign wave power inverter (Model 11340-1)

[@rickiewilson2018]

The minute you touched the wire to the screw and neutral you had the problem solved that is exactly what I did I got the two orange lights to one side now everything works perfect I ran a wire from the screw to neutral ground I have good ground all the other inverters did not work you can't ground them for some reason this particular model you have you were able to solve the problem right at the beginning the minute I did that hook up the high efficiency furnace worked perfectly and is continuing to still work excellent I tried everything I'm so glad I watched this video it solved the problem answered prayer thank you

[@rickiewilson2018]

I am so glad I watched your video I watched a whole bunch of these I don't even know what they're talking about it's so confusing but when I put your video on and you had that socket Checker plugged in I knew I was on the right track when you grounded that to neutral ground and the screw on the body and the indicator check the good ground that's just what I needed my high efficiency furnace now works I have bought three or four inverters you can that ground them they won't ground but I have the inverter you have and I was able to watch your video and now my efficiency furnace Works excellent thank you

[@DCGUY]

Hi, I believe these particular inverters are galvanic isolation models which means they do not have neutral/ earth bonding. All you can do is connect the earth cable clip to the battery negative terminal but you won't get any A/C outlet tester to work as it would using mains power. Look into galvanic isolation, lots of info online.

[@RogueOntheRoad]

The solution may be to connect the chassis ground to the battery negative terminal which should be grounded to the chassis which should be grounded to earth ground.
Check with the manufacturer or an electrician before trying any connections.

[@DylanFowler]

Could you do the same for the inverter and MPPT controller?

[@jimh8478]

get a gfci outlet and wire the ground to the common at that point. it won"t be a real ground but it will behave like one. and keep the DC ground isolated from AC

[@1D10CRACY]

I believe your tester is just looking for continuity on the ground and common. Some inverters internally bond this and some do not. You are working on an isolated circuit from earth ground, so running a wire to earth ground will really do nothing for you in this case. The ground lug on the inverter chassis I believe is designed to ground to a vehicle chassis.

[@pauladams4890]

I have a 1500w one of these...& it works well except for my mouse doesn’t work on my laptop & occasionally my air fryer with a touch screen plays up.
Did you manage to fix it? Aside from my mentioned issues...I’m pretty happy with it, but ideally would like to fix it if possible.

[@LastExile1989]

@@LewisMoten Is that a modified Sine wave or pure sine wave? That matters more than an isolated ground doesn't it?

[@keithrobertson6037]

I think Jim is saying what I am thinking, hook the ground up where you wire the ac wiring and just ground it at that block

[@RogueOntheRoad]

Those screws are supposed to hold the big semi conductors tight against the heat sink.

[@normnilsson7208]

What was the solution because I’m having the same problem.

[@DylanFowler]

@@LewisMoten couldn't you just run a ground wire from the neg terminal on the inverter, then run it to negative bus bar and run a ground wire to a separate rod than the house earthing system?

[@societyofrobots]

@Norm Nilsson @Lewis Moten The manufacturer says there is a "ground problem" with v1 of the inverter, and supposedly v2 fixes it. I have no idea what the issue is though.

[@normnilsson7208]

@@LewisMoten The solution is: tie N to G with a jumper in a recepticle that you get from Lowes keep it plugged while you use the inverter, I saw when you put the meter from N then touched chassis your 2 light came on.

[@lllatham]

Dude run a dang copper or copper clad ground rod. you keep screwing around and your going to get ground loops that will make you nutz... Don't do the horizontal run vertical only

[@Techno888]

That inverter is Chinese made no such thing on their design for a working neutral wire good luck 😆