I Will Never Buy A EG4 Inverter Again

[Zwy]

I guess you can abuse the SCC with PV overvoltage, then post a video on the internet blaming the inverter is at fault?

 

[740GLE]

Always blame someone else?!?!?

Btw you should really edit the title of the thread, “User proves you shouldn’t exceed max VOC”. Lol

 

[Danke]

10 x 400W bifacial panels in series. Did he mention the brand so we can check the Voc?

EG4:
Max PV Array Open Circuit
500VDC
PV Array
90VDC - 450VDC

 

[Shimmy]

I'd really prefer if the title was changed... it doesn't help provide good information.

 

[BenFromSignatureSolar]

I guess you can abuse the SCC with PV overvoltage, then post a video on the internet blaming the inverter is at fault?

We've been working with this individual for a while. Sometimes it's tough to get people to change their minds about how things work. He fried that board with PV, so F11 won't clear on its own.

 

[z_zk_z]

Deleted

 

[Koldsimer]

Max Voc is a hard limit. If you don't know that, you should find a new hobby. Or hire a qualified electrician.

 

[Zwy]

10 x 400W bifacial panels in series. Did he mention the brand so we can check the Voc?

EG4:
Max PV Array Open Circuit
500VDC
PV Array
90VDC - 450VDC

Probably something like the Trina which is 50VOC. 10 panels in series=500VOC

He stated he had it working for a few months, then it quit working. When colder weather hit, the VOC was higher than 500V and the result was the failure.

 

[Zwy]

Max Voc is a hard limit. If you don't know that, you should find a new hobby. Or hire a qualified electrician.

At the 4 min mark he goes on about a switch so the inverter cuts off in over current, then over voltage. Confusing to say the least.

 

[timselectric]

No matter what you do. It's important to understand how to do it.

 

[Koldsimer]

No matter what you do. It's important to understand how to do it.

True. We have a saying that's widely used in the framing trade... f*ck it, nail it. Definitely not to be applied in solar. I triple check stuff and ask questions when i don't know something about solar.

 

[Gavin Stone]

I’ve watched a few of his videos. I think he fried the first inverter with over voltage. Then fried the second when he didn’t use a precharge resistor. That’s just a guess though of course.

 

[740GLE]

True. We have a saying that's widely used in the framing trade... f*ck it, nail it. Definitely not to be applied in solar. I triple check stuff and ask questions when i don't know something about solar.

Every problem looks like a nail when all you have is a hammer!!

 

[Danke]

I’ve watched a few of his videos. I think he fried the first inverter with over voltage. Then fried the second when he didn’t use a precharge resistor. That’s just a guess though of course.

Don’t the LiFePower batteries have precharge built-in or is that later models?

 

[Gavin Stone]

Don’t the LiFePower batteries have precharge built-in or is that later models?

They do. But I think he has some other batteries on the side there also. It’s been a while since I watched the video.

 

[Lt.Dan]

Don’t the LiFePower batteries have precharge built-in or is that later models?

I vaguely remember the precharge circuit not working correctly on a lot of batteries. Don't quote me on that though.

 

[rhino]

Is there ANY charge controller on the market that can protect against going over the the maximum allowed voltage for the controller? I don't know of any.

 

[Koldsimer]

Is there ANY charge controller on the market that can protect against going over the the maximum allowed voltage for the controller? I don't know of any.

Yes. Midnite has charge controllers that allow you to go over the max voc. It's called hypervoc and it adds the voltage of the battery in addition to the max rating to allow for some wiggle room. Example- midnite classic 150 is rated at 150v max voc but when running it with a 48 battery, you have a safe limit of 198 voc. Great feature when you are pushing the limits of your CC and cold weather puts you over the top.

 

[sunshine_eggo]

Is there ANY charge controller on the market that can protect against going over the the maximum allowed voltage for the controller? I don't know of any.

Yes. Midnite Solar classic have a HyperVoc function. They will operate normally up to their limit, but above that, they will shut off until Voc drops down to limit. There is a HyperVoc limit too.

Edit: @Koldsimer beat me to it.

 

[sunshine_eggo]

I guess you can abuse the SCC with PV overvoltage, then post a video on the internet blaming the inverter is at fault?

No surprise that he posted the video in November... probably when temps pushed his Voc over the limit.