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EG4 6500 Power Output Problem

scollar

scollar

New Member
Joined
Apr 17, 2022
Messages
11
Location
Tennessee
I have two EG4 6500EX inverters and am unable to get them working.
The output signal cause house light that are on dimmers to flicker and flash.

The only way it will work is to be on AC (not any DC inputs) with the Ground Screw removed. Then it will only work if I am using them them singly not in split phase mode. If in DC modes the inverter turns N to 130v while running 120v 60Hz.

How do I get clean power out of these inverters?

There is NO tech support available. I have been waiting on lists and calling for over 1 month. Not sure what to do?
 
Well this is surprising to see haha. He PM'd me yesterday and I've answered him multiple times and started researching this for him within 2 hours of his PM. Additionally his ticket with Signature Solar support team was originally created on the 5th and he called 2 days later on the 7th saying he was waiting for 3 weeks for a reply. Also per his PM to me he indicated that he had a wiring issue after I mentioned checking the hz of his system as that is a common cause of LED flashing lights.
"Somehow in my Inverter Bye-Pass Transfer switch I was getting another conflicting AC signal. 120/60 HZ intermittently.
I am working on re-wiring now. Hopefully this will fix the issue."
So that really makes me wonder how his entire system is wired and if it was incorrect, was there damage to the inverters or other components to his system at this point? I will definitely research this further, but man am I surprised to see this come up when I just messaged him hours ago and just now returned to my desk to look at the forums again.
 
scollar said:
I have two EG4 6500EX inverters and am unable to get them working.
The output signal cause house light that are on dimmers to flicker and flash.

The only way it will work is to be on AC (not any DC inputs) with the Ground Screw removed. Then it will only work if I am using them them singly not in split phase mode. If in DC modes the inverter turns N to 130v while running 120v 60Hz.

How do I get clean power out of these inverters?

There is NO tech support available. I have been waiting on lists and calling for over 1 month. Not sure what to
Click to expand...
Are your units at 180° phases?
What is your pv input voltage?
 
PV Voltages are between 150-280v
180 phase, 120v, 60Hz.

I have removed a bypass switch and still the same.

Richard thank you very much for your help. I was unable to open a ticket for weeks and when I finally got a tech on the phone he place me on hold and never returned. So I contacted customer service that sent urgent messages to tech team. After I called many more times finally I got to level 1 tech that did not understand the product. I have been in level 2 queue since the 5th, 9 days ago.

The inverters were wired correctly and pictures sent to tech support. I am getting the exact same when wiring directly to the inverters.
 
scollar said:
PV Voltages are between 150-280v
180 phase, 120v, 60Hz.

I have removed a bypass switch and still the same.

Richard thank you very much for your help. I was unable to open a ticket for weeks and when I finally got a tech on the phone he place me on hold and never returned. So I contacted customer service that sent urgent messages to tech team. After I called many more times finally I got to level 1 tech that did not understand the product. I have been in level 2 queue since the 5th, 9 days ago.

The inverters were wired correctly and pictures sent to tech support. I am getting the exact same when wiring directly to the inverters.
Click to expand...
Any resolution here?
 
I'me running twin EG6500's. A few things I can think of. Do you have one set to master? UPS or appliance mode? I have tried higher input PV voltage and it kills the PV input watts. I got less from 6 panels inline than 4 on one string. Over 190V and it kills power PV watts. Post up your settings. People will compare and share.
 
Clifton said:
I'me running twin EG6500's. A few things I can think of. Do you have one set to master? UPS or appliance mode? I have tried higher input PV voltage and it kills the PV input watts. I got less from 6 panels inline than 4 on one string. Over 190V and it kills power PV watts. Post up your settings. People will compare and share.
Click to expand...
Are your units working correctly? Putting out steady 120V on PV.
 
It isn't always 120v output. It matches grid. Sometimes I have 122 or 119. This pic is from a minute ago. I re read your first post. I have no grounds connected.

If I had your PV voltage, I would have problems.

On ac output mode, do you have yours configured similar? I did not put #2 inverter just #1
 

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bones1 said:
I don't have wifi or computer hooked up yet.
Click to expand...
Setting 28 on the LCD screen

Do you have batteries hooked up if this is split phase? Seems strange that you have these problems. I've mentioned a couple of things and don't really here much back.
 
Thanks for the help, Clifton. I hooked both strings of PV up and once again the output voltage was all over the place up to 146v so I re-installed one of the bonding screws in one inverter and it fixed it. I now have steady 120V running on PV.
 
Nevermind. Turned everything on today and it's back to the same issue. Output all over the map on two strings of solar. It had about 1600 watts of pv when I checked. Can someone check their setup and see if theirs does this on solar. 2 EG4's in split phase with two batteries and 10 250w panels. 5 panels to each inverter. Not under a load.
 

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Last edited:
The last time I saw this I asked the owner if he had the Phase settings for his Inverters set right and he said he did.
Since yours was working I assume they are right. So the issue we diagnosed with his was that one of the Neutral wires was not properly connected. Once he fixed that the voltage went to 120V.
So check the Neutral wires and make sure they are connected properly.
 
I just went through all the settings again 2p1 and 2p2 180 are correct as well. Does/ did he have his bonding screws removed from inside the inverters? I had them both removed but re-installed one last night. When I did that my separated neutrals and grounds in the sub panel were now bonded. I have the bonding screw still removed from the sub panel. I will re-check the neutrals, thanks.
 
bones1 said:
I just went through all the settings again 2p1 and 2p2 180 are correct as well. Does/ did he have his bonding screws removed from inside the inverters? I had them both removed but re-installed one last night. When I did that my separated neutrals and grounds in the sub panel were now bonded. I have the bonding screw still removed from the sub panel. I will re-check the neutrals, thanks.
Click to expand...
we never discusses the bonding screws so I have no idea what he had done with them.
 
What is setting 10 set to?

I have no grounds even attached anywhere, until I can get my main panel apart again and isolate them so the don't touch the others on the main. If you think you have a ground issue, just run without any until you resolve it.

What is your grid ac voltage at the inverters input? Inverter should match it.

I know they say these can take up to 500V on the PV input. I have problems starting at around 190vdc. I made a post but got no response. Not saying it's your problem but I had 8 panels at 225vdc making like 200 watts. The more sun, the higher the voltage, the lower the wattage output. Same panels in 4s2p make 3200watts.
 
robby said:
we never discusses the bonding screws so I have no idea what he had done with them.
Click to expand...
So I checked the neutrals and they are good. I stood and watched these inverters for a few hours and noticed a few things.
1. When the batteries are charging with solar and the fans ramping up, even a little bit, the AC output screens read 120v steady. When the charge lights go off as in fully charged after 5 min the AC output screens start fluctuating wildly again.
2. As I watch the output screens read anywhere from 100 to 145 volts fluctuating wildly for a half hour I rigged up an outlet and put a 1300w, 120v load on the inverters with a heater and immediately the AC output measured 120V steady on both inverters and stayed there until I shut the heater off. Then in about 5 min, the output started fluctuating as before. Seems like the inverter needs something to do to be happy.
3. My question is: Could this be normal behavior and there is not a problem at all? I'm starting to think so.
 
bones1 said:
So I checked the neutrals and they are good. I stood and watched these inverters for a few hours and noticed a few things.
1. When the batteries are charging with solar and the fans ramping up, even a little bit, the AC output screens read 120v steady. When the charge lights go off as in fully charged after 5 min the AC output screens start fluctuating wildly again.
2. As I watch the output screens read anywhere from 100 to 145 volts fluctuating wildly for a half hour I rigged up an outlet and put a 1300w, 120v load on the inverters with a heater and immediately the AC output measured 120V steady on both inverters and stayed there until I shut the heater off. Then in about 5 min, the output started fluctuating as before. Seems like the inverter needs something to do to be happy.
3. My question is: Could this be normal behavior and there is not a problem at all? I'm starting to think so.
Click to expand...
I don't think that this is normal behavior. You should contact Signature Solar and see what they say.
 
Mine do not do that.
I have no grid connection.
1 inverter n/g bond in place, 2nd unit n/g removed.
MDP has isolated neutrals
Gen has n/g bond
 
LywWyr said:
Mine do not do that.
I have no grid connection.
1 inverter n/g bond in place, 2nd unit n/g removed.
MDP has isolated neutrals
Gen has n/g bond
Click to expand...
I think I heard someone mention that removal of that bond as being very important.
 
For my set up this configuration is correct.
Inverter 1 provides n/g bond while in "inverter mode" and the Gen provides its own N/g bond when in "gen" mode.
 
bones1 said:
Excellent info. I get back to you. Thanks
Click to expand...
"Gen mode". Do you have your generator connected to the AC input? If so what size wire are you using?. I would like to do that as well once I figure out the issues.
 
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