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My system is off-grid and has a Quattro 48/8000 with a FRONIUS PRIMO 3.0 on AC out, an MPPT 150/70 and a CCGX .
When battery is in float (55V) and the Fronius (on AC OUT) is regulated be the frequency (above 50.2Hz) the AC loads readings on the CCGX go crazy! Up and down by hundreds and even thousand Watts.
As soon as the frequency drops to 50 all is back to normal.
Any ideas?
you wrote " is regulated be the frequency (above 50.2V) "
do you mean 50.2 Hz maybe ?
I seems to me that the fronius output value is much less actuated on screen than the load is. What is the item that provides the load reading ? shunt from a bms ? Or the ccgx calculates it from output quattro data + output primo data ? How does ccgx obtain primo data ? data wire ?
Thank you for your reply. Yes I ment 50.2 Hz.
The Ccgx calculates from the Quattro and Primo output. Battery is controled by Bms. CCGX and Primo are connected on the same wireless access point with utp cables.
but it seems to me in reality your load is connected in parrallel to fronius, right ? at ACout quattro you have in parralel Fronius primo & your load. But on ccgx it's not considered like this at all.
Seems Ac loads on ccgx only reflects that is provided by quattro, and then if primo power value is received at a different rate actualisation, you may not be reading values measured at the same time.
as exemple a a said moment ac loads shows 1150W but it's untrue, in fact it can be 11 50W provided by quattro and 450W provided by Primo (but it's reading not actual). and why it fluctuates it's because quattro production does fluctuate between it and the primo, somehow who has to be the energy provider is a bit a battle between the 2.
now why the battery flow doesn't reflect the 1150 pull from quattro onDC is a mystery.
at least we know your ccgs display loads does not reflect the loads because you have measured it by other means. Next thing to do maybe is also to check with a watt meter what does come out from the primo and compare with the readings.
somehow real watt meter analogic with a needle are really the good thing. I personnally have one at my multiplus and I can see what happens very quicky, very helpful. it looks like better have that instead of a ccgx.
I think this is due to the slow update frequency of the PV inverters power measurement.
AC loads are calculated as the difference between Victron output and PV input power.
What Firmware do you have in your CCGX?
If you have a version prior to 2.54 please upgrade.
What you seem to experience is a well known bug in old VenusOS versions - which I'm pretty sure Victron staff also knows all too well. ;-)
