I’m in the planning stages of a new 3‑phase installation and would really appreciate seeing example system designs from anyone who has done something similar.
Planned system:
3 × Victron Quattro 48/10000 configured for 3‑phase
64 kWh battery bank (Seplos BMS)
Cerbo GX for system control and monitoring
Two 3‑phase distribution boards:
DB1: Incoming grid supply + non‑backed‑up loads
DB2: Fed from AC‑Out of the Quattros → ESS‑backed loads
I’m particularly interested in:
Example wiring diagrams or block schematics for similar 3‑phase ESS setups
Best practices for AC‑In vs AC‑Out distribution separation
Tips for configuring the Cerbo GX + ESS mode in a 3‑phase environment
Any “gotchas” when working with three Quattros in phase‑shifted configuration
Battery integration recommendations (BMS comms, fusing, DC busbar layout, etc.)
If you have photos, diagrams, or even just lessons learned from your own 3‑phase Quattro builds, I’d be grateful. I want to make sure the design is clean, compliant.
Thanks in advance to anyone willing to share their experience.
That’s not a small system. Best discussed with an experienced supplier/installer.
While this is a DIY section, it’s not a substitute for experienced suppliers.
Investing time in research and training will fill in many of those gaps.
Plenty of existing topics available via search as well.
Definitely not a small system. I presently have 1-phase, but have upgraded to 3-phase and thus secured 3 quattros.
I know most of the fundamentals, just thinking is there anything i should be thinking about when it comes to components etc
I will share a common mistake when i have troubleshot DIY systems. The inverters must all have the same DC length cables to the bus bar. Otherwise weird unexpected shutdowns happen.
Keep the dc cables from all the batteries the same length.
Dc set uo must be as compact as possible. For some reaskn no one ever sizes uo with longer runs of cable even though it’s mention in the manual (Kidding i know the reason its a poor reason)
Not sure what you would need these for?
Not sharing designs, intellectual property and regulations being different depending on where you are (hence the need to for local distribution support). Plus to some degree installer responsibility.
At the bottom of the quattro pages and in the manual of course there is stuff you can look at and put together.
OGPS
(Ed @ Off-Grid Power Systems - offgridps.com)
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I would add that AC cabling, particularly on the outputs of the Quattros, should be the same size and lengths to keep the impedance on the inverted outputs similar. Oversizing the AC wires can sometimes cause issues if the lengths are short.