How we Network Chargers that Don't support OCPP
This system only supports AC chargers up to 22 kW in power
1. You install Smart Switches and E-meters in your switchboard that allow our application to network your existing EV chargers that do not support OCPP.
If you are buying new Chargers, we recommend that you buy a Charger that supports OCPP networking. We have a range of these chargers to support your needs.
System Over View
The Combination of our application and switch board components that you install allows control of your EV Chargers.
EVamp Application provides a way for you to open your Chargers for Public Access. You do not need to be on-site or available for a customer to charge their vehicle and pay for the service. Free Access can also be granted where you have a need to do so.
You install Shelly Switch Devices in your switchboard. These devices are securely controlled by our Application. This removes the risk of someone simply charging for free.
Once you have your devices installed in your switch we will guide you in how to create an account in our system and connect your chargers. Click here for more details on the application.
3-Phase Systems
Normally 11 or 22 Kw
Switch Components
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A 40 amp 3 Phase Contactor, 1 per Charger. This is large enough for a 22 kW charger.
Shelly Device Option 1, allows LAN connection and Wifi
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Shelly Pro 3EM, with a Shelly Pro 3EM Addon Switch, 1 per Charger. This switches the 40amp contactor.
Shelly Device Option 2, connection via Wifi only.
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Shelly 3EM which includes a built in switch.
Single Phase Systems
Between 2.2Kw & 7.4Kw
Switch Components
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Single Phase 40 amp Contactor, 1 per Charger. eg 7.4 Kw Charger needs an Amp rating of 40 amps.
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Shelly Pro EM power meter that also contains a switch
Vehicle AC Charging Capacities
The rate at which a car will charge (kW) on AC power is not a simple calculation but is dependent on both the Charger capacity and car's onboard charging system capacity.
As a basic rule, most plug in hybrid vehicles (PHEVs) such as the Mitsubishi Outlander will charge at a maximum rate of 3.7kW, which will give you around 16km of range per hour charging.
Most full battery electric vehicles (BEVs) will charge at a rate between 7kW and 16 kW giving the driver between 32km to 64km of range per hour of charging.
New BMW, Porsche and Tesla model 3 and Y Vehicles, have an on board charging capacity of 11kWs. The Tesla model S and X will charge at 16kW. BYD Vehicles charge at 7kWs.
A common misunderstanding assumes the capacity of the Charger determines a car’s AC charging rate and not the the car’s onboard charger. If for example, a PHEV is connected to a 11kW Charger and the vehicle AC charging capacity is 3.7Kw, then 3.7Kw is the rate at which the car will be charged. Equally, if the vehicle charging capacity is 16kW and charger capacity is only 7kW, then the car will only charge at 7kW.
This is why we recommend using power meters in your set-up. Calculating the invoice amount only by time will mean, for some vehicles you will invoice too much and others too little.