2 Fronius PV, 1 Quattro, 2 Weco battery. The system is fully off grid. When the weco battery is full, the whole system trips off until its being reset. Is there something I am missing?
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Froniuos Quattro trips when weco battery is full
What in the system is tripping? The battery? Are you seeing any error messages on the GX device in your system.
I am going to assume it is the battery. If it is then the bms is shutting down to protect itself and you may need to lower the charge voltage slightly.
What we have seen often is when the batteries are full and a load drops off the overshoot from the Fronius needs to sink somewhere and will often cause the bms of banks to shutdown to prevent overcharge. Run at a slightly lower SOC or voltage to help.
Have you sized the fronius correctly according to the 1:1 ratio recommended?
@Alexandra,
Thank you for your reply. The error message on the GX device is "WECO warning High voltage".
When you say reduce the charge voltage slightly, do I reduce it in the quatrro or the fronius? And I cant seem to find charge voltage only charge current.
Reduce it on the Quattro. I have not used Weco personally but if you have used the extreme voltages shown in the manual reduce it by 0.2v or a bit more. Since it is not a supported battery some experimentation may be needed.
How is the GX controlling the 2 Fronius? Do you have a data manger?
The other possibility is your battery may not be large enough.
https://www.victronenergy.com/live/ac_coupling:start#minimum_battery_capacity
Also I am resident in Nigeria and I cant seem to choose my grid setting. Can some help me out?
EDITED by @Guy Stewart (Victron Community Manager) - Apologies, but we don't allow the sharing of the grid code on the community.
It is available via all Victron Dealers, and they should be contacted if you need it.
It is important for maintaining our compliance with standards that the code to adjust grid control settings is not freely available.
Also you may be having over voltage because the Grid tie units or the assistants in the Quattro have not been setup correctly and thus the froniuos units are not derating when the batteries are full and the solar is outputting more than you are using AC wise.
you have to setup frequency shifting so that this derates the units or interconnect the froniuos via serial cable or some such method (I have not set a froniuos unit up so cant advise here).
anyway what happens if its doing the above.
when ever this occurs and the battery voltage goes hi then from what I have seen, at some point the inverters reset and as this causes the micro grid to effectively go off/and back on. the froniuos units then turn off the solar , the inverters restart then and as the froniuos comes back on line the cycle repeats.
if this is the case then you have to look at how you are setting up the grid tie interface and whats doing what
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