EG4 18kPV Q+A general thread

Luxpower_Gilbert · Jul 6, 2023

42OhmsPA said:
I don't own one but I am still considering one. The feedback for the grid is a big concern for me.
I think the diagram makes it pretty clear...
CT1 clamps around L1 from the grid / to L1 terminal on the inverter, with the arrow pointing towards the inverter. CT2 clamps around L2 from the grid / to L2 terminal on the inverter with the arrow pointing towards the inverter.
You would check the reversed CT box if you had L1 / L2 flip flopped but the arrows in the right direction.

Is that correct?
I'm not sure on the checkbox part, that may be the arrow direction, If L1 / L2 were flip flopped couldn't you just swap the CT connections at the inverter...?

yes! this is correct, CT1=L1 grid/L1 inverter input, CT2=L2 grid/L2 inverter input
the reverse on the setting is only used, if the arrow of the ct is pointing in the wrong direction.
if your set up is whole house back up you can just install the ct inside the inverter, grid input.

42OhmsPA · Jul 6, 2023

GRV0423 said:
yes! this is correct, CT1=L1 grid/L1 inverter input, CT2=L2 grid/L2 inverter input
the reverse on the setting is only used, if the arrow of the ct is pointing in the wrong direction.

Thanks. I don't see what's so hard to understand (coming from the guy that flipped his positive and negative hooking up an old 24v system the other day ? always meter before you flip )

Zapper77 · Jul 6, 2023

Typically in the CT world reverse refers to rotating the CT 180 degrees, while I would use Flip or swap if you need to "swap" CT location from left to right (aka move L1 to L2)

zuki4life · Jul 6, 2023

Does anyone know the cutover time from grid to backup battery? I have an outback skybox right now and I need to upgrade, but what I hate about the skybox is when the power goes out (where I live that is like 4x a week sometimes) it won't get fast enough of a cutover from grid to battery and I end up having to reset clocks.

SignatureSolarJames · Jul 6, 2023

zuki4life said:
Does anyone know the cutover time from grid to backup battery? I have an outback skybox right now and I need to upgrade, but what I hate about the skybox is when the power goes out (where I live that is like 4x a week sometimes) it won't get fast enough of a cutover from grid to battery and I end up having to reset clocks.

we have a video showing it keeping clocks and PCs on, we are at 10ms transfer now, so safely fast enough

rmacgurn · Jul 6, 2023

JonathanW said:
You’re not wrong the manual is wrong. Mine only works with the box checked backwards also

Unless all along that box is not intuitive, and has to do with l1 and l2 rather than actual direction ct meter

I Know believe that the idea of reverse dose not mean the arrow is in wrong direction but the CT's are backwards on the L1/L2 which in my case was a crap shoot as both are black. so since Marcus fixed it but checking the reverse CT's setting in the advanced setup I have to assume it was for that purpose and not for someone that put the arrows facing the grid vs the inverter, even so keep in mind that most other inverters I have seen or used the arrows on the CT's went to the meter not the inverter. I posted a manual page above showing that. nice to hear from the LuxPower guys on here to confirm that function of CT's reversed....

fromport · Jul 6, 2023

Markus_SignatureSolar said:
Because L1 and L2 are 180 Degrees out of phase from each other. The inverter has grid sensing feature so whats tied to L1 needs L1 CT whats tied to L2 needs L2 CT

Split phase 120V/240V is NOT 180 degrees out of phase.
It is a single phase, tapped in half. nothing can be out of phase.

Quattrohead · Jul 6, 2023

fromport said:
Split phase 120V/240V is NOT 180 degrees out of phase

It absolutely is.

Zapper77 · Jul 6, 2023

fromport said:
Split phase 120V/240V is NOT 180 degrees out of phase

We don't need to go down that rabbit hole.

goldserve · Jul 7, 2023

Enphase envoy consumption meter needs to be absolutely on the correct phasing. It matters.

ksmithaz1 · Jul 7, 2023

Split-phase is just a center-tapped transformer. In phase or 180 out depends on how you are reading it. . . It's AC

timselectric · Jul 7, 2023

Quattrohead said:
It absolutely is.

Now, you're just stirring the pot. lol

timselectric · Jul 7, 2023

Split-phase is single phase.
There's only one phase.

Zwy · Jul 7, 2023

timselectric said:
Split-phase is single phase.
There's only one phase.

Some will never understand this......

rmacgurn · Jul 7, 2023

hate to say it but the idea that the CT's where on the wrong lines (L1/L2) seems to be nonsense as today )after Marcus) reversed mine check out the way its readying now. Import and export are backwards and were not before he did the switch and solar has shut down completely.

rmacgurn · Jul 7, 2023

More proof that the CT's were not reversed until the box was checked yesterday, it just didn't show up since I was running on solar and batteries until 5am today,

rmacgurn · Jul 7, 2023

ok no reply from Marcus so I took another person's advice and did a restart then turned off the reverse CT feature and low and behold solar came back and its running the house correctly. seems all those posts about CT's being on a certain Load line (L1 & L2) was nonsense and they just measure the flow of current to the meter as my gut said. sadly it got cloud in last 2 mon and looks like a storm coming so I lost a few hours of recharge time.

Zapper77 · Jul 7, 2023

rmacgurn said:
ok no reply from Marcus so I took another person's advice and did a restart then turned off the reverse CT feature and low and behold solar came back and its running the house correctly. seems all those posts about CT's being on a certain Load line (L1 & L2) was nonsense and they just measure the flow of current to the meter as my gut said. sadly it got cloud in last 2 mon and looks like a storm coming so I lost a few hours of recharge time.View attachment 156212

Can you explain that again. Way to early for me, trying to understand. Did you find a solution?

EastTexCowboy · Jul 7, 2023

Zwy said:
Some will never understand this......

I already had my lesson on this some time back from @timselectric and maybe from you as well. Once I wrapped my head around it a lot of other stuff started to make sense. I think the whole split phase terminology thing causes a lot of confusion. I know it did with me. But I still get that you need to keep L1 and L2 consistent throughout your system. I'm just happy to see that there appears to be a solution to the unintended backfeed to the grid on this inverter.

Markus_EG4 · Jul 7, 2023

rmacgurn said:
hate to say it but the idea that the CT's where on the wrong lines (L1/L2) seems to be nonsense as today )after Marcus) reversed mine check out the way its readying now. Import and export are backwards and were not before he did the switch and solar has shut down completely. View attachment 156204 View attachment 156205

I just Checked your record for the setting Change log. The CT Reversed setting I set yesterday is still set, the only thing that was changed in the settings since then was battery charge settings and that was by you sir. Maybe the CTs need to be checked to make sure they are attached good this doesnt make any sense because the CT reverse setting is still enabled. I'm going to monitor your system for a while and check the historical data to see if I can find anything else

EG4 18kPV Q+A general thread

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