I’m setting up a 3-phase system with 3x Quattro 48/8000 and pylontech batteries with MPPT’s only.
I’ve setup the CCGX so that the relay is used for generator start/stop. The CCGX relay then activates another relay that supplies each Quattro with 1-phase on AC-1-IN.
But …
When the CCGX activates the relay (based on SOC), the 230V appears on the VE-bus of each Quattro but these don’t start charging the batteries.
It worked for about a month or so without any problems but now all of a sudden it doesn’t anymore. I’ve reset the complete system blank as a 3-phase system but it just doesn’t work.
Then used assistants, identical in all 3 Quattro’s
generator general flag to ignore AC-IN
generator start/stop
=> use general flag
=> open relay to start
=> start when SOC < 10%
=> stop when SOC > 20%
=> generator not stopped by AC-IN
This does not work to start charging batteries either.
Anyone any idea what is happening or what could cause this problem?
Whatever % the batteries are on … it never starts charging.
There is no generator connected. I use the grid as a “generator”. When I activate the “generator” on the CCGX, the grid voltage appears on the AC-IN of all Quattros (VE bus indicates 230 Volt, 50 Hz) but the Quattro doesn’t start charging.
try turning the AC input current down a bit. We have a 3 phase system that won’t connect when that number is too high. It’ll connect at 40a and then let you ramp up the AC in current but it won’t let us start out at a higher amperage.
If the Multi’s are not ignoring the AC In for some reason (an assistant somewhere, grid values outside of spec, …), the other option I can think of is phase rotation.
Did this ever get solved? I now have a similar issue, I replaced a Venus GX by a Cerbo GX, moved the wires from the relay of the Venus GX to the relay of the Cerbo GX and it stopped working. All settings remained the same. Normally, based upon SoC of the battery or on load conditions, the AC2-In would kick in and the Quattro would change from inverting to charging. I could also manually start the ‘generator’.
Yes, it turned out that the ac1-in on one Quattro was broken. Therefore the system did not want to charge from the grid. Rewired the grid to ac2-in on all Quattros and it worked again. Why it broke down? No idea, guess it happens sometimes.
The assistant method has never worked on this system. Not in ac1 nor ac2 in. Never. Still don’t understand why not but I’m satisfied with this “work around”.
Thanks for the response. I finally discovered that one of the wires from the relay was not correctly connected. It then worked again for a while. And then spontaneously it did not antmore. After a lot of faulr searching, it decided to work again. I find it unreliable. Quite often the AC-In-2 will spontaneously kick in for a few minutes in the middle of the night and after 2 minutes swotches off again. No major issue, but it keeps buggi g me why it does that. Also, when SoC goes below 20 % it is supposed to kick in to charge the LifePO4 batteries to 80 %, sometimes it doe and sometimes not. Also based on load, it is supposed to kick in when more then 800 W is used for longer then 5 seconds. Sometimes it does and sometimes it does not. If I then reset the Quattro it remembers it should have started and starts. It remains unreliabke this way and a nuisance to which I continously have to pay attention.
The phenomena you describe has little to do with the Quattro I think.
In principle the GX relay switches a contactor that connects the grid into the Quattro. The Quattro “sees” it and should simply start charging. In this setup the Quattro doesn’t look at SOC etc.
The fact that it varies in terms of SoC etc has to do with some other settings in your GX device I think. Check all the settings in the GX device that control the relay. Most likely something is interfering there.