This site is now in read-only archive mode. Please move all discussion, and create a new account at the new Victron Community site.
Hi,
I currently have 3xQuattros operating in 3-phase mode.
Is it possible to add a fourth Quattro, in just inverter mode (utilizing the same battery as the other quattros)?
I would like some form of redundancy in case the 3-phase system has an issue (like overload that switches of all quattros).
This is for equipment that has dual PSUs, like network equipment or servers.
Kind regards
ehsab
Yes. Also no. It wont work the way you want it to.
If you are wanting redundancy (back up for the back up) it is better to have it a separate system entirely with its own battery.
A battery can also shutdown from an overload (depending on what battery you use of course). SOC can be an issue. If you have it as a slave on one of the phases then it will be affected by the system shutdown anyway.
You could use a Multi (quattro may be unnecessary) just on ups mode for the system or circuit you don't want to shutdown while the main system recovers.
I have 380Ah of Lead, not that likely that the battery will shutdown :)
Not interested in buying more batteries, if i can use what i allready have.
There is not much of a price difference between Multiplus-II or the Quattro, and i think i will be better off with similar units if i need to replace one of the three i have in the 3ph system.
So you say i could use a unit by itself in UPS mode, connected to the same battery bank as the others?
Is this documented somewhere?
Why will it not work hooking up an inverter to the batterybank and have it serving a different load then the quttros?
Kind Regards
ehsab
I should perhaps mention that i use the 3-ph quattros as a UPS with Solar.So all current from the grid is flowing through the Quattros, use them in UPS mode atm.
BUT, if they (or any unit) fail, i will lose all power.
Thats why i want some redundancy, and i whant it to be conected to my Venus (well, to the VRM portal any way).
