What’s the Difference Between Victron Multiplus and Quattro?

The Victron Multiplus and the Quattro are two inverter chargers from Victron Energy.

Multiplus Vs Quattro Comparison

Feature/Specification	Victron MultiPlus-II	Victron Quattro
AC Input	Single AC input	Dual AC inputs
Power Output	Generally lower power output options (can be paralleled)	Higher power output options (can be paralleled)
Suitability	Ideal for residential or smaller commercial setups	Suited for larger, more complex installations
AC Source Management	Manages a single source (shore OR generator)	Seamlessly switches between two sources
Application Scope	Standard energy storage and conversion needs	Advanced grid integration, handling multiple power sources
Remote Monitoring	Supported	Supported
PowerAssist Technology	Included	Included
Ideal Use Case	Smaller scale systems, less demanding applications	Larger scale systems, demanding applications

Key features of the Multiplus

• One AC input: This can be shore power OR generator (if generator is sized correctly)
• Two AC outputs: One main and one critical load output
• Can be connected in parallel to increase total power output
• Can be connected to create a three-phase system (3x Multiplus are needed)
• Multiplus I: 800Va to 5kVA
• Multiplus II: 3kVA to 15kVA (different form factor and more compliance with grid codes for ESS)

Key features of the Quattro

• Two AC inputs, one shore, and one generator or two generators
• The Quattro will automatically connect to the live power source on AC-in
• Quattro I: 3kVA to 15kVA
• Quattro II: 5kVA (different form factor and more compliance with grid codes for ESS)
• Automatically start a generator with prioritization

When should you get a Quattro over a Multiplus?

A Quattro is advised if you change the AC source frequently, like a boat with shore power and a generator.

An example:

You have a house that is prepared for a grid-down situation. You use the grid on AC-in 1 and a generator on AC-2. If the grid goes down, the Quattro will choose the active power source and use that. In this case, it will be the generator.

 Summarized: if you use a generator, use a Quattro. 

 

CAUTION:

The Multiplus generally doesn’t accept generator input only if it is sized correctly (read more about it here).

Conclusion

If you want to use both the AC input and a generator, use a Quattro.

If you only need one AC input source, a generator, or the grid, then use a Multiplus. A cabin won’t have the grid available, so you can go for a Multiplus with a generator. Make sure you size the generator according to the instructions. Otherwise, it will not work.

Read more: Best inverters for off-grid

FAQ

How do you connect the Victron Multiplus II to the grid?

I have written an article on how to wire the Multiplus 2 into your house. Read the article here.

Difference between Multiplus and Multiplus II

The difference between a Multiplus and a Multiplus II is minor. First, the Multiplus II is more compatible with ESS (you need this if the grid is available). Second is the different form factor. The Multiplus II uses less power when idling. The quattro has 2 AC inputs while the multiplus has 1.

Difference between Quattro and Quattro II

The same goes for the Quattro. The Quattro II has more grid compatibility, a different form factor, and consumes less power on idle.

Use the Quattro I for off-grid applications and the Quattro II for grid-tied situations.

What is the difference between Multiplus II and Multiplus II-GX?

The GX version has the GX device (cerbo) inside the inverter/charger. If you get the standard version and want the GX capability, purchase a GX device separately.