Most Common FAQ's about zappi

Do I need solar panels for a zappi to work?

No, not at all! Zappi works as a stand alone 7kWh charger, though has extra features not available on many other chargers, that make it compatible with renewable energy systems, such as solar panels and wind turbines.

What are the installation requirements for the Zappi?

(Circuit Breaker or 30 mA Type A RCBO) 40A 2-pole curve B (1-ph version), 40A 4-pole curve B (3-ph version)

How many CT's are provided ?

1 x CT for the 1-ph version & 3 x CT's for the 3-ph version

How does the “PEN conductor loss” detection works?

In case of a PEN fault, Zappi becomes completely isolated from the input supply. That means that all conductors present at the output socket or cable - including protective earth and control signals – will be safe removing any risk of potential electric shock. Zappi meets the requirements of BS 7671:2018, 722.411.4.1 (iii).

What is the minimum charging level on the 3-phase Zappi?

In all cases, the EV is the limiting factor. Some EVs cannot be charged using 3-phase, hence they will only be charged using 1-phase. The charging current is limited by the EV as well, usually it’s 16A, 30A or 32A. If your EV can be charged using 3-phase, Zappi has the capability to charge at a low rate using only 1-phase.

1-phase charging range : 1,4 kW → 07 kW
3-phase charging range : 4,1 kW → 22 kW

Can I charge at different current rate across the phases in 3-ph charging ?

No, when charging with 3-phase, the current drawn by the EV will be the same on all phases.

Can the new 3-phase Zappi be connected to one phase only ?

Yes, it will act like a standard single phase Zappi. However, only 1 CT input will be available.

Can I swap an existing 7kW charger with the Zappi ?

Yes, with the single phase Zappi. The supply is very similar, just make sure you connect the extra CT sensors.

Can I have my existing charger and a Zappi installed together without overloading my supply?

It really depends on your installation setup. You can install Zappi using a dedicated circuit from your main consumer unit and set a “Grid Limit” to make sure you will not blow your main fuse. Or you can install your Zappi from a secondary consumer unit (a garage feed for example) and connect a sensor to act like a “Group Limit”, to make sure that your secondary supply will not be overloaded as an addition to the “Grid Limit”. But don’t forget to ask your DNO if you are allowed to install a second charge point.

Can you switch between 3-ph and 1-ph charging?

A 3-ph Zappi connected to a 3-ph supply can be set to charge in ECO mode using 1 phase only. It’s quite useful when you want to charge at a lower rate to track surplus in ECO mode but have the possibility to charge at 22kW in FAST mode or by using the Boost function.

Can we charge a single phase capable EV with a 3-ph Zappi?

Yes, absolutely!

Does the zappi support Vehicle to Grid (V2G)?


How does ECO and ECO+ mode work when charging 3-ph?

In all cases, charging 3-ph means taking the same power from all phases. Usually, the electricity meter “net” all phases, so does Zappi. You can than have import on one phase and export on another, the total sum being zero. Zappi will make sure that the netting across phases equals 0. If the available surplus is too low for 3-ph charging, Zappi will automatically switch to 1-ph charging, allowing for low charge power.

What can I measure with the Cts on the 3-ph Zappi?

On a 3-ph Zappi, the Cts are supposed to be connected on a 3-ph load (grid, generation, battery etc..). You can’t connect different types of Cts, they have to be installed on the same location. It is different on the 1-ph version of Zappi, that can measure 3 differents (single phase) loads (grid, gen and battery for example)

Which Evs can charge using 3-ph?

The Renault Zoé, the Tesla range, the BMW i3, the B-Class electric, though vehicle technology is improving all the time and more vehicles are coming through.