What do the phase modes on a home's EVSEs do?

What each Phase mode on a home's EVSEs does in Hub energy management, when Solar phase switching is available, and how to set the time between switches.

Updated 6 November 2026

For: Charge point operators (CPOs) who set up and support the home charging installations of their customers

Each EVSE (Electric Vehicle Supply Equipment) on a home has a Phase mode. It tells energy management how to treat the phases of the EVSE. This article explains the four options, the time between phase switches setting, and what you see on the page while an EVSE switches phases.

Homeowners do not see these screens.

Where do I find the phase mode?

  1. Go to CPO / Network → Energy management → Home energy features.

  2. Select a home.

  3. Find the EVSEs card.

  4. Use the Phase mode dropdown on the row of the EVSE.

Each option has a short description in the dropdown. The ? icon next to the dropdown explains all four options. The Hub saves your choice right away. If the save fails, the dropdown goes back to the old value and shows an error message.

What are the four phase modes?

  • Let EVSE decide: the EVSE picks its own phases. Energy management uses the number of phases it last measured. This is the default.

  • Solar phase switching: energy management switches the EVSE between 1 phase and 3 phases during a solar charge.

  • Single-phase installation: tells energy management that the EVSE is wired to one phase only.

  • Three-phase installation: tells energy management that the EVSE is wired to three phases.

Single-phase installation and Three-phase installation describe how the EVSE is wired. They do not make the EVSE switch phases.

What does solar phase switching do?

A car needs a minimum power to charge. At 6 A and 230 V, that minimum is about 1.4 kW on 1 phase. On 3 phases, it is about 4.1 kW.

Home solar often sits between those two values for hours. With Solar phase switching, energy management drops the EVSE to 1 phase when solar is low. A charge can then start from about 1.4 kW of solar. When there is enough solar, energy management switches the EVSE back to 3 phases. The car charges from solar power it would otherwise miss.

When can I use solar phase switching?

Solar phase switching only works during a solar charge. Turn on Enable solar charging in the Settings of the home first.

  • If solar charging is off for the home, you cannot pick Solar phase switching. The option says to turn on solar charging.

  • If an EVSE is already set to Solar phase switching and solar charging is off, the row shows a warning icon. The EVSE will not switch phases until you turn on solar charging.

  • If solar charging is on, Solar phase switching shows the tag Recommended. The tag does not show on an EVSE set to Single-phase installation.

How do I set the time between phase switches?

When you select Solar phase switching, a second dropdown appears next to the phase mode, showing the selected option (for example Balanced). It sets the minimum time between two switches.

  • Responsive: at least 2 minutes between switches.

  • Balanced: at least 5 minutes between switches. This is the default.

  • Gentle: at least 15 minutes between switches.

Some cars do not handle frequent phase changes well. If a car stops charging after a switch, choose Gentle.

If an EVSE has an interval saved from earlier that is not one of these options, the dropdown shows it as Custom (N s). If that value is under 1 minute, energy management still waits at least 1 minute.

How do I see which phase an EVSE is charging on?

While an EVSE on Solar phase switching is charging, its row shows a badge: 1 phase or 3 phases. Hover over the badge to see when the EVSE last switched.

How does the solar forecast show what phase switching could add?

The Solar production forecast card of the home can show a line under the chart. It says for about how many hours of the forecast the solar power is enough for a 1-phase charge but not for a 3-phase charge. That is the solar power an EVSE can only use with phase switching.

  • The line only shows when solar charging is on for the home.

  • The line only shows when at least one EVSE could still be set to Solar phase switching. An EVSE that is already switching, or is set to Single-phase installation, does not count.

  • The line is hidden if there are no such hours.

  • The number is an upper bound. The forecast is solar production, and the household uses part of that power itself.

What should I read next?

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