Complete installation of a 7.4kW MyEnergi Zappi EV charger in a Newquay garage, featuring load management systems and hardwired ethernet connectivity for optimal charging performance and electrical safety.
Electric vehicle ownership continues to grow across Cornwall, with more homeowners recognising the convenience and environmental benefits of home charging. This Newquay installation demonstrates how a well-planned EV charger setup can transform a standard garage into a fully functional charging station whilst maintaining complete electrical safety.
The project centred around installing a 7.4kW MyEnergi Zappi EV charger on the internal rear wall of the garage. The Zappi unit offers tethered charging, meaning the charging cable is permanently attached to the unit. This design prevents cable theft whilst providing the convenience of always having a charging cable available. The tethered system eliminates the need for homeowners to purchase separate charging cables or worry about compatibility issues between different charging standards.
The electrical supply configuration required careful planning to accommodate the high power demand of the EV charger. The installation involved upgrading the garage consumer unit with a new 40A circuit breaker specifically for the EV charger circuit. The existing garage supply cable, being 10mm CSA, could handle the increased load when paired with the upgraded 40A supply breaker. This approach prevented any risk of overloading the existing electrical infrastructure whilst providing adequate power for efficient vehicle charging.
Load management formed a critical component of this installation. Many older properties in Newquay have electrical supplies that weren’t designed to handle the additional load of an EV charger alongside existing household appliances. The solution involved installing a hardwired load management device connected directly to the property’s electricity meter. This system continuously monitors the total electrical demand of the property and automatically adjusts the EV charger’s power output to prevent overloading the main electrical supply.
The load management system operates independently of the home’s WiFi network, using dedicated Steel Wire Armoured (SWA) data cable routed from the electricity meter to the EV charger. This hardwired connection provides reliable communication between the meter and charger, allowing real-time monitoring of electrical consumption. When household electrical demand increases, the system automatically reduces the charger’s power output to maintain safe operating levels. When demand decreases, the charger can resume full power charging.
Smart connectivity features were integrated through a separate hardwired ethernet connection. This involved running additional SWA data cable from the property’s WiFi router to the EV charger location. The hardwired ethernet connection provides more stable internet connectivity compared to wireless connections, particularly important for features like remote monitoring, scheduling, and over-the-air firmware updates. This connectivity allows homeowners to monitor charging sessions, schedule charging during off-peak electricity rates, and receive notifications when charging is complete.
The cable routing required careful consideration of the property’s layout and existing infrastructure. Both data cables were routed around the exterior of the property at low level, requiring the temporary lifting of pathway paving blocks. The cables were then surface clipped along planter boarding before entering the garage area. This approach minimised disruption to the property’s interior whilst providing secure cable routing that protects against damage from weather and ground movement.
The garage consumer unit modifications involved installing a Type A RCD (Residual Current Device) specifically designed for EV charging applications. Type A RCDs provide protection against both AC and pulsating DC earth leakage currents, which can occur with modern electronic equipment including EV chargers. This safety device continuously monitors the electrical circuit and will disconnect power within milliseconds if it detects any earth leakage, preventing potential electric shock hazards.
Circuit protection was further enhanced with dual 40A MCBs (Miniature Circuit Breakers) to handle the high current requirements of the EV charger. These devices provide overcurrent protection, automatically disconnecting the circuit if the current exceeds safe levels. The installation also involved consolidating existing circuits within the garage consumer unit to create the necessary space for the new EV charger circuit breaker.
Testing and certification formed the final phase of the installation. Comprehensive electrical testing was carried out on all new circuits to verify safe operation and compliance with current electrical standards. This testing included insulation resistance measurements, earth continuity checks, and RCD operation verification. The results were documented in an Electrical Installation Certificate (EIC), which provides formal verification of the installation’s safety and compliance.
Building Control Notification was submitted following completion of the electrical work. This process involves notifying the local building control authority of the electrical installation work, providing them with copies of the electrical certificates and installation details. This notification maintains compliance with building regulations and provides homeowners with official documentation of the electrical work for insurance and property sale purposes.
The MyEnergi Zappi charger offers several advantages for home EV charging. The unit can operate in multiple modes, including fast charging when solar panels are generating excess energy, or eco mode that uses only surplus renewable energy. The built-in display provides real-time information about charging status, energy consumption, and cost per charging session. The unit’s smart features allow integration with home energy management systems and time-of-use electricity tariffs.
Safety considerations extended beyond electrical protection to physical installation aspects. The charger was mounted at an appropriate height to prevent accidental damage whilst remaining accessible for regular use. The surface-mounted cable routing was secured with appropriate fixings to prevent damage from garage activities or equipment movement. All electrical connections were made using appropriate IP-rated enclosures to protect against moisture and dust ingress.
The installation provides the homeowner with a complete EV charging solution that integrates seamlessly with their existing electrical system. The load management system prevents any risk of overloading the property’s electrical supply, whilst the smart connectivity features enable optimal charging scheduling and energy management. The hardwired ethernet connection provides reliable internet connectivity for all smart features, whilst the load monitoring system operates independently to maintain electrical safety at all times.
