The Equalizer monitors the amount of power consumed in the house and will automatically adjust the amount of power allowed to the charger to prevent overloading the circuit. The minimum amount of power the Easee chargers can use for charging your EV is 6 amps. If the house requires so much power that the amount available to the chargers is less than 6 A, obviously they will shut down. However, once 6 A is available again, it will take roughly 10 minutes of constant 6 A power on each phase before the Equalizer allows the charger to restart.
Surplus charging is only available if Easee is listed as the site operator.
The reason for this is that many electrical appliances use electricity very unevenly and inconsistently. This wait to restart is to prevent premature wear of the relays, so they are not constantly opened and closed.
This "ramping up" time to restart is an additional factor in charging from solar power. There must be stable 6 A / 1400 W supply on each phase used. If the charger is locked to three phases, each phase will require 6 A / 1400 W. The on-board charger in an EV requires equal power on each phase. If one phase only has 6 A available while the other two have more, then the on-board charger will only request and use 6 A per phase.
If you have set the phase mode to Auto in the app, it will switch from three phase to single phase when needed. This means that it will stop charging on three phase if the load is too high and start charging on only one phase.
To protect the relays in the charger, the charging session will complete on single phase and not revert to three phase. The charging session will be completed on single phase regardless of whether, during the charging session, there will be sufficient capacity on all phases to charge with three phases. If the capacity has increased sufficiently in the system again (for example, solar production has increased) and you want to switch from single-phase to three-phase, you must stop the current charging session and restart charging in the app. If charging on solar power is first started on single phase, the Equalizer will not automatically activate three-phase charging if the production increases to over 6A on all phases.
If the charger is locked to three-phase and only solar power is activated, it requires 6 A x 6 A x 6 A production for at least 10 minutes before charging will start. If you have a system with a high (average) load but still want to charge with as high (average) current as possible, it may in some cases be better to charge with single phase only. This is so that the Equalizer can easily balance the consumption versus the availability and add it to the phase with the largest available capacity.
Then the Equalizer can put the consumption on that phase and does not have to deal with all three phases. It is easy to test whether charging with single phase only is better, you can just lock the charger to one phase under “Charger settings” in the Easee app.