# 3-Phase 63 A On-Grid Battery Backup (UPS) – MultiPlus II vs Quattro & Quattro II

**URL:** <https://community.victronenergy.com/t/3-phase-63-a-on-grid-battery-backup-ups-multiplus-ii-vs-quattro-quattro-ii/19620>\
**Category:** Q&A and troubleshooting\
**Tags:** dynamic\_ess, 3-phase, quattro-ii, expert, ess\
**Created:** [22 January 2025 22:47 UTC](https://community.victronenergy.com/t/3-phase-63-a-on-grid-battery-backup-ups-multiplus-ii-vs-quattro-quattro-ii/19620 "2025-01-22T22:47:49Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![mm0nst3r](https://avatars.discourse-cdn.com/v4/letter/m/f08c70/32.png) [@mm0nst3r](https://community.victronenergy.com/u/mm0nst3r)\
**Post date:** [22 January 2025 22:47 UTC](https://community.victronenergy.com/t/3-phase-63-a-on-grid-battery-backup-ups-multiplus-ii-vs-quattro-quattro-ii/19620/1 "2025-01-22T22:47:49Z")

</div>

Hello,

I need to power a 3-phase, 63 A per phase system on grid with battery backup, essentially functioning as a whole-building UPS. From what I understand, the MultiPlus II does not support 3-phase above 5 kVA. Could someone please confirm this?

It seems that my only option would be using three Quattro 48 V/8–10–15 kVA units with a Ziehl UFR1001E (as per this datasheet ([https://www.victronenergy.com/upload/documents/Datasheet-ESS-application-Quattro-48V-8-10-15kVA-EN.pdf](https://www.victronenergy.com/upload/documents/Datasheet-ESS-application-Quattro-48V-8-10-15kVA-EN.pdf))). However, on the Victron website, Quattro II currently appears to be available only in a 5 kVA version.

1. Is that correct—are larger Quattro II models not yet available?
2. What are the advantages of Quattro II compared to the original Quattro series? Should I even bother?
3. Are bigger Quattro II versions planned for release?

Thank you for any clarification!

---

<div class="post-metadata">

**Author:** ![nickdb](https://dub1.discourse-cdn.com/victron/user_avatar/community.victronenergy.com/nickdb/32/51440_2.png) [@nickdb](https://community.victronenergy.com/u/nickdb)\
**Post date:** [23 January 2025 06:23 UTC](https://community.victronenergy.com/t/3-phase-63-a-on-grid-battery-backup-ups-multiplus-ii-vs-quattro-quattro-ii/19620/2 "2025-01-23T06:23:31Z")

</div>

Just check the spec sheets, all units iirc support 3-phase, they don’t all support parallel.  
If certification is important, you can check which have certs via the downloads area on the main victron site, which has a cert section.

Roadmaps for availability aren’t usually shared on the community, keep an eye on the professional site news/blog section.  
What you see listed is what is currently available.