# 3-phase system with single line output. Is this possible? **URL:** \ **Category:** DIY\ **Tags:** 3-phase, domestic, multiplus-ii, diy\ **Created:** [16 February 2026 17:04 UTC](https://community.victronenergy.com/t/3-phase-system-with-single-line-output-is-this-possible/53460 "2026-02-16T17:04:21Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![Dmsever](https://avatars.discourse-cdn.com/v4/letter/d/2bfe46/32.png) [@Dmsever](https://community.victronenergy.com/u/Dmsever)\ **Post date:** [16 February 2026 17:04 UTC](https://community.victronenergy.com/t/3-phase-system-with-single-line-output-is-this-possible/53460/1 "2026-02-16T17:04:22Z")
I’m in Ukraine. You may know that we’re currently experiencing serious power outages—one hour on, then five hours off. Therefore, it’s crucial for me to quickly recharge my batteries (Pylontec US2000C 6 pcs). I have a three-phase 10-kilowatt grid, or 3.3 kW per phase. Currently, the other two phases are simply not being used. Here’s what I have installed: one Victron Multiplus II 48/5000/70 inverter connected to one phase. All loads are also connected to this line. I plan to install two more Multiplus II 48/5000/70 inverters (one for each phase) to simultaneously charge a single battery bank at a higher current. My question: is it possible to combine all three AC outputs into one line to achieve a combined output power? …really hope for your help. ---
**Author:** ![kr0815](https://avatars.discourse-cdn.com/v4/letter/k/48db29/32.png) [@kr0815](https://community.victronenergy.com/u/kr0815)\ **Post date:** [16 February 2026 17:14 UTC](https://community.victronenergy.com/t/3-phase-system-with-single-line-output-is-this-possible/53460/2 "2026-02-16T17:14:13Z")
yes, this is possible - in the end you have a 3 phase System, but then using only one output Problem: if one incoming phase is missing, the whole system won´t work Maybe easier and cheaper to buy additional chargers, connect them to phase 2 and 3? I use a Huawei R4850 to get my batteries faster charged ---
**Author:** ![lxonline](https://dub1.discourse-cdn.com/victron/user_avatar/community.victronenergy.com/lxonline/32/25567_2.png) [@lxonline](https://community.victronenergy.com/u/lxonline)\ **Post date:** [16 February 2026 17:32 UTC](https://community.victronenergy.com/t/3-phase-system-with-single-line-output-is-this-possible/53460/3 "2026-02-16T17:32:34Z")
Are you wanting the combined power output? If it is just for charge power then put them into charger only mode when needed (use the generator start stop or something like it with node red) and do not bother programming them as one system such as three phase or parallel. It will be simpler especially if you get a phase down. If it is just as a charger then it only needs AC input (no output wiring) and a connection to the battery bank or system bus bar. ---
**Author:** ![Dmsever](https://avatars.discourse-cdn.com/v4/letter/d/2bfe46/32.png) [@Dmsever](https://community.victronenergy.com/u/Dmsever)\ **Post date:** [16 February 2026 17:46 UTC](https://community.victronenergy.com/t/3-phase-system-with-single-line-output-is-this-possible/53460/4 "2026-02-16T17:46:11Z")
Thanks for the reply! The suggestion to use server power supplies will likely be the easiest to implement. Do they allow you to precisely regulate the charging current? I haven’t figured that out yet. ---
**Author:** ![Dmsever](https://avatars.discourse-cdn.com/v4/letter/d/2bfe46/32.png) [@Dmsever](https://community.victronenergy.com/u/Dmsever)\ **Post date:** [16 February 2026 17:46 UTC](https://community.victronenergy.com/t/3-phase-system-with-single-line-output-is-this-possible/53460/5 "2026-02-16T17:46:43Z")
Thank you for your reply! Yes, I wanted to simultaneously increase the AC output power, as I was currently only using single-phase power (3.3 kW). I realized I’d have to redesign the distribution board to distribute the load across three lines. I know some three-phase inverters have a load asymmetry feature, which means the same power is drawn from the grid on each phase, even if the output loads are different. Does Victron have this feature? ---
**Author:** ![lxonline](https://dub1.discourse-cdn.com/victron/user_avatar/community.victronenergy.com/lxonline/32/25567_2.png) [@lxonline](https://community.victronenergy.com/u/lxonline)\ **Post date:** [16 February 2026 17:52 UTC](https://community.victronenergy.com/t/3-phase-system-with-single-line-output-is-this-possible/53460/6 "2026-02-16T17:52:34Z")
They can balance what they pull from the phases during charge with an asymmetrical load. ---
**Author:** ![kr0815](https://avatars.discourse-cdn.com/v4/letter/k/48db29/32.png) [@kr0815](https://community.victronenergy.com/u/kr0815)\ **Post date:** [16 February 2026 18:20 UTC](https://community.victronenergy.com/t/3-phase-system-with-single-line-output-is-this-possible/53460/7 "2026-02-16T18:20:00Z")
> [@Dmsever](#): > > The suggestion to use server power supplies will likely be the easiest to implement. > Do they allow you to precisely regulate the charging current? I haven’t figured that out yet. Do you have electronic skills? I use this project: [GitHub - mjpalmowski/CAN-BUS-control-R4875G1-with-ESPHome-and-MQTT: Control one or more R4875G1 R4875G5 R4830G2 R4850G2 R4850S1 and adjust Current and Voltage Parameters on HUAWAI R4875G Battery-Charger via ESP32-hosted Web-Page, MQTT or Homeassistant](https://github.com/mjpalmowski/CAN-BUS-control-R4875G1-with-ESPHome-and-MQTT) charging current is then easily adjustable - even through victron / nodered by MQTT But in your Situation - you could als use them just to charge when there is main power available If you set the correct voltage, they will stop when the batterie is full ---
**Author:** ![Dmsever](https://avatars.discourse-cdn.com/v4/letter/d/2bfe46/32.png) [@Dmsever](https://community.victronenergy.com/u/Dmsever)\ **Post date:** [16 February 2026 19:11 UTC](https://community.victronenergy.com/t/3-phase-system-with-single-line-output-is-this-possible/53460/8 "2026-02-16T19:11:13Z")
> [@kr0815](#): > > Do you have electronic skills? I’m an audio engineer. It’s not the same as electrical engineering or electronics, but it allows me to understand the processes involved. ---
**Author:** ![Dmsever](https://avatars.discourse-cdn.com/v4/letter/d/2bfe46/32.png) [@Dmsever](https://community.victronenergy.com/u/Dmsever)\ **Post date:** [16 February 2026 19:15 UTC](https://community.victronenergy.com/t/3-phase-system-with-single-line-output-is-this-possible/53460/9 "2026-02-16T19:15:58Z")
> [@kr0815](#): > > If you set the correct voltage, they will stop when the batterie is full Remote control would be more interesting, though, as there are situations where it’s inappropriate to continue charging if the sun is about to set. Overall, this is new to me and very interesting. Thanks, I’ll try to figure it out. ---
**Author:** ![kr0815](https://avatars.discourse-cdn.com/v4/letter/k/48db29/32.png) [@kr0815](https://community.victronenergy.com/u/kr0815)\ **Post date:** [16 February 2026 19:33 UTC](https://community.victronenergy.com/t/3-phase-system-with-single-line-output-is-this-possible/53460/10 "2026-02-16T19:33:23Z")
it´s not that complicated - and you will find much help here ---
**Author:** ![BartChampagne](https://avatars.discourse-cdn.com/v4/letter/b/a6a055/32.png) [@BartChampagne](https://community.victronenergy.com/u/BartChampagne)\ **Post date:** [16 February 2026 21:49 UTC](https://community.victronenergy.com/t/3-phase-system-with-single-line-output-is-this-possible/53460/11 "2026-02-16T21:49:04Z")
If you want the system to behave as 3phase 3x 5kVA when charging and as 15kVA single phase when inverting, then no. The cleanest way to achieve such a goal would be to use 3x 5kVA in 3phase setup as chargers and a single 10kVA unit (or 2x 5kVA in parallel) as single phase inverter. Costs of such a system would quickly go up. The best option would be a standard 3x 5kVA 3phase system where you spread the loads over the inverters/chargers. ---
**Author:** ![Vladyslav\_Kh](https://dub1.discourse-cdn.com/victron/user_avatar/community.victronenergy.com/vladyslav_kh/32/46516_2.png) [@Vladyslav\_Kh](https://community.victronenergy.com/u/Vladyslav_Kh)\ **Post date:** [17 February 2026 08:38 UTC](https://community.victronenergy.com/t/3-phase-system-with-single-line-output-is-this-possible/53460/12 "2026-02-17T08:38:32Z")
Hi Dmytro, I’m from Ukraine too and understand you very well. The best approach is to buy two separate chargers (one per free phase), such as the Huawei R4875G1, because it can operate on 85-300 V AC input. From time to time, our grid can drop less than 180V, so MPII can’t use it. Then configure charges to change the battery by voltage or add some controllers as @kr0815 proposed to manage them using Node-Red. ---
**Author:** ![chrigu](https://avatars.discourse-cdn.com/v4/letter/c/ba9def/32.png) [@chrigu](https://community.victronenergy.com/u/chrigu)\ **Post date:** [17 February 2026 08:50 UTC](https://community.victronenergy.com/t/3-phase-system-with-single-line-output-is-this-possible/53460/13 "2026-02-17T08:50:00Z")
> [@Vladyslav\_Kh](#): > > can operate on 85-300 V AC input Using a charger to complement an MP system i like to do as well, just because of the very wide voltage and frequency windows ---
**Author:** ![Dmsever](https://avatars.discourse-cdn.com/v4/letter/d/2bfe46/32.png) [@Dmsever](https://community.victronenergy.com/u/Dmsever)\ **Post date:** [17 February 2026 13:38 UTC](https://community.victronenergy.com/t/3-phase-system-with-single-line-output-is-this-possible/53460/14 "2026-02-17T13:38:48Z")
Hi Vladyslav, nice to meet you here! Thanks for the tip; it’s very useful to be able to charge your device with any AC input voltage. But the fact is that it is still unknown to me, I have only come across it. At the same time, I am also considering the purchase of two more VMPII inverters, because this will allow me to increase the power of the entire system. ---
**Author:** ![Dmsever](https://avatars.discourse-cdn.com/v4/letter/d/2bfe46/32.png) [@Dmsever](https://community.victronenergy.com/u/Dmsever)\ **Post date:** [17 February 2026 13:49 UTC](https://community.victronenergy.com/t/3-phase-system-with-single-line-output-is-this-possible/53460/15 "2026-02-17T13:49:12Z")
But here’s what’s interesting: When you ask the AI ​​whether it’s possible to get one total output from three phases, it stubbornly continues to say that it’s possible. It advises asking the following questions: - ​"How to configure three MultiPlus-II in parallel on a single phase?" - ​"Parallel connection of outputs (AC-Out) for single phase operation" ​"Can I sync three different input phases into one output phase?" ​"Phase shift settings in VE.Configure" Do you guys think this AI is flattering, or is it possible that it can still be done? May be just need to study Vісtron’s capabilities more deeply… ​"Syncing L2 and L3 to L1 phase angle" — Синхронізація кута фаз L2 і L3 відносно L1. ---
**Author:** ![kr0815](https://avatars.discourse-cdn.com/v4/letter/k/48db29/32.png) [@kr0815](https://community.victronenergy.com/u/kr0815)\ **Post date:** [17 February 2026 13:55 UTC](https://community.victronenergy.com/t/3-phase-system-with-single-line-output-is-this-possible/53460/16 "2026-02-17T13:55:39Z")
there is only one transformer in the MP2, used fpr charging and discharging These transformers can´t be connected to a single phase and a 3 phase net the same time ---
**Author:** ![chrigu](https://avatars.discourse-cdn.com/v4/letter/c/ba9def/32.png) [@chrigu](https://community.victronenergy.com/u/chrigu)\ **Post date:** [17 February 2026 13:55 UTC](https://community.victronenergy.com/t/3-phase-system-with-single-line-output-is-this-possible/53460/17 "2026-02-17T13:55:59Z")
Not possible. The three phases are defined by their 120° angle between them. Otherwise it woud simply be a single phase. Which of course is possible, but as a parallel config. You cant get both with the same three inverters without rewiring and changing the system config through VE.BusQuickConfigure ---
**Author:** ![Vladyslav\_Kh](https://dub1.discourse-cdn.com/victron/user_avatar/community.victronenergy.com/vladyslav_kh/32/46516_2.png) [@Vladyslav\_Kh](https://community.victronenergy.com/u/Vladyslav_Kh)\ **Post date:** [17 February 2026 14:18 UTC](https://community.victronenergy.com/t/3-phase-system-with-single-line-output-is-this-possible/53460/18 "2026-02-17T14:18:17Z")
It doesn’t matter how much power you have if you can’t charge your batteries. First, need to resolve the battery‑charging issue using a separate charger or by charging from PV (MPPT). After that, you can increase the system’s power and battery capacity. ---
**Author:** ![Dmsever](https://avatars.discourse-cdn.com/v4/letter/d/2bfe46/32.png) [@Dmsever](https://community.victronenergy.com/u/Dmsever)\ **Post date:** [17 February 2026 18:41 UTC](https://community.victronenergy.com/t/3-phase-system-with-single-line-output-is-this-possible/53460/19 "2026-02-17T18:41:25Z")
But here’s what’s interesting: When you ask the AI ​​whether it’s possible to get one total output from three phases, it stubbornly continues to say that it’s possible. It advises asking the following questions: - ​"How to configure three MultiPlus-II in parallel on a single phase?" - ​"Parallel connection of outputs (AC-Out) for single phase operation"​"Can I sync three different input phases into one output phase?" ​"Phase shift settings in VE.Configure" Do you guys think this AI is flattering, or is it possible that it can still be done? May be just need to study Vісtron’s capabilities more deeply… ​"Syncing L2 and L3 to L1 phase angle" — Синхронізація кута фаз L2 і L3 відносно L1. > [@Vladyslav\_Kh](#): > > It doesn’t matter how much power you have if you can’t charge your batteries. I can charge batteries (300 Ah), but I would like to do it faster. Now I barely manage to return the energy reserve spent in 4-5 hours, while I have to limit myself in consumption. Therefore, I come to the idea that in the end I will have to purchase two additional PMIIs, as well as charging from Huawei in case of undervoltage at the AC input. ---
**Author:** ![kr0815](https://avatars.discourse-cdn.com/v4/letter/k/48db29/32.png) [@kr0815](https://community.victronenergy.com/u/kr0815)\ **Post date:** [17 February 2026 18:48 UTC](https://community.victronenergy.com/t/3-phase-system-with-single-line-output-is-this-possible/53460/20 "2026-02-17T18:48:29Z")
> [@Dmsever](#): > > Syncing L2 and L3 to L1 phase angle read what was above said - it´s not a Victron Problem, more a generall problem Bringing 3 Phases to one needs an AC-DC Converter and an DC-AC Converter MP2 could be both, bit not the same time [Next page](https://community.victronenergy.com/t/3-phase-system-with-single-line-output-is-this-possible/53460.md?page=2)