OpenEVSE is a fully open-source EVSE (Electric Vehicle Supply Equipment) charging station designed by OpenEVSE. OpenEnergyMonitor have been collaborating with OpenEVSE to improve Emoncms remote data logging integration and web UI control. 

An EVSE charging station, is a device an electric car (EV) is plugged into to charge. It communicates with the car to agree on a charging rate that is the fastest and safest rate both the car and the power supply can support.

Caution: this unit is a kit, assembly requires wiring Alternating Current (AC) components that will be exposed to voltages up to 250v. If you do not have the experience and knowledge required to safely work with AC voltages please consult with an experienced electrician for assistance and inspection of your work.

KIT FORM ASSEMBLY REQUIRED

Features 

• 32A Level 2 (240V) 
• Variable charge rate: 6A-32A (in 1A increments)
• Single Phase 
• RGB Colour Status LCD display 
• Power monitoring: session & all-time
• Session controls: time limit, energy limit (KWh limit)
• Charging timer schedule using built in RTC 
• Control via RAPI serial API
• OpenEVSE V5 Controller
• IP68 waterproof 

• WiFi connectivity (optional):
• UI web-control interface
• Eco mode: automatically adjust charging rate depending on available power e.g. Solar PV diversion**
• Emoncms data logging
• MQTT control & data logging
• Remote control via HTTP & MQTT RAPI API
• WiFi OTA firmware updating
• OCPP V1.6 (beta)
• Home Assistant Integration (beta)

• Physical dimensions (rear): 260 mm x 130mm 

** Solar PV divert requires emonPi solar PV monitor (or another MQTT solar PV data source). See OpenEVSE WiFi setup guide. 

Required Extras 

• Tethered EV Charging Cable
• Consumer unit wiring: the unit should be wired into a consumer unit with correctly sized cable and circuit breaker by qualified electrician. 

• (optional) EVSE cable hanger available separately.

Safety

OpenEVSE units have been designed to exceed the safety requirements for EV Charging Stations from SAE J1772, NEC and UL. Before supplying power to the car (and continuously while charging) the EVSE unit conducts a number of checks, no power is supplied until all the checks have passed.

• Power interlock
• Pilot signal
• Ground monitoring
• Ground fault interrupt
• Welded contact detection 
• Temperature throttling
• EV ID check 
• Ventilation check 

Read more: 

• OpenEVSE Safety Features.
• OpenEVSE Safety Features Flow Chart 

Build & Setup Guides

• 1. OpenEVSE Hardware Build Guide (Europe)
• 2. OpenEVSE User Guide

***

Technical

• OpenEVSE Controller Datasheet

Open Source Resources 

• OpenEVSE WiFi Gateway firmware

• OpenEVSE Github Repo