EG4 AC Coupling Fronius
- Thread starter SolarCzar
- Start date
zanydroid
Solar Wizard
OK so Orange means enabled, instead of "You can click on this to disable it"
SolarCzar
New Member
Last edited:
SolarCzar
New Member
Correct
SolarCzar
New Member
I appreciate you guys helping. I have a 6hr Drive this evening for work, but will be checking along the way.
Hopefully @millsan1 or @SignatureSolarJess can bring some help to the party, because I'm out of ideas.
Hopefully @millsan1 or @SignatureSolarJess can bring some help to the party, because I'm out of ideas.
zanydroid
Solar Wizard
OK, tried to take another look on my personal PC but could not because I ran out of power while moving your PDFs to a virus checked workflow. PDFs are scary. Imgur (you can bulk upload from PC)/pasting them as photos to the forum (works for me on Chrome on iOS) is nicer.
Need to get back to debugging some stuff for work (was looking at your PDFs during my lunchbreak on my phone which presumably is safe enough). I will check again later.
Need to get back to debugging some stuff for work (was looking at your PDFs during my lunchbreak on my phone which presumably is safe enough). I will check again later.
Why is grid sell back set to zero? Can you try setting they to 12kw?
How's the battery currently being charged?
Also, there is no sub panel correct? The 18kpv is feeding your main panel via the grid input? Do you have the CTs installed?
SolarCzar
New Member
So Grid Sell Back set to zero as it was the default setting, and the book says it's a "limitation"
Let me change that to 12kw and see what happens.
Yes, CT's installed on the Main Sub Panel
SolarCzar
New Member
Nope Nope, turned Grid Sell Back back to 0. When set to 12, it pulled from the batteries and I was sending 16kW battery + PV to the grid
Ok fingers crossed.
I went back and saw that you have 30kw of DC coupled pv attached directly to the 18kpvs so that's how the battery is charged. So right now are the inverters supporting your main panel loads at all?
But did your gen connection become active?
To add to this I still think this is the issue. Maybe sell back from the battery to grid to get to about 95% or at least below 100% and see if it comes on
SolarCzar
New Member
Crap, I didn’t check and I had to get on the road
C'est la vie
Btw, is there any advantage to AC coupling in your case? You have 30kw of pv already attached. Looks like battery has no problem getting to and staying at 100%
You could connect your froniuses directly to main panel
SolarCzar
New Member
They were attached to the main panel originally. If you look at those pictures, you’ll see that they were on the main grid panel 30 amp breakers when I turned them on the 18 K started having weird issues. It was like the CT were minimizing solar and was not maximizing its output.
SolarCzar
New Member
As for advantage definitely I’m still grandfathered with the net metering program and the state of Louisiana and I get to sell back at equal amount so I can build up a credit overtime and already had the panels so why not
SolarCzar
New Member
I have 40 kW on the on the roof and another 10 kW that I was thinking about adding, but I was pressing my limits associated with roof space
SolarCzar
New Member
I was also planning to add a third battery, but I wanted to see how the performance would be with two initially before I purchased that that third one from signature solar
Hmm. Very interesting. I wonder what logic the CT could be trying to use to control things.
SolarCzar
New Member
Agreed. If you notice the CT’s are in the GRID subpanel which connects to the as it was easier for me to wire them there. I don’t know if doing so will make that big a difference? Either way, I wonder why the two can’t coexist with them paralleled on the GRID subpanel?
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