Installation of a 7.4kW MyEnergi Zappi EV charge point in a Bodmin garage with load monitoring system and steel wire armoured data cable installation to prevent electrical overloading.
Installing an EV charge point in your garage requires careful planning and technical expertise to deliver a safe, efficient charging solution. This Bodmin installation demonstrates how proper electrical infrastructure can accommodate electric vehicle charging whilst protecting your property’s existing electrical system.
The homeowner required a 7.4kW MyEnergi Zappi EV charge point installed within their garage, specifically requesting a tethered unit to eliminate the need for separate charging cables. Tethered charge points feature permanently attached cables that cannot be removed, providing convenience whilst reducing the risk of cable theft. The unit was mounted on the rear internal wall of the garage, positioned for optimal vehicle access and cable reach.
Power supply to the charge point originates from a dedicated circuit breaker installed within the existing garage consumer unit. This configuration provides appropriate protection for the high-power charging circuit whilst integrating seamlessly with the existing electrical distribution system. The circuit breaker rating accommodates the 7.4kW charge point’s maximum output whilst maintaining safety margins for sustained operation.
A hard-wired load monitoring device forms part of the installation to prevent overloading the property’s electrical infrastructure. This monitoring system continuously tracks the electrical demand throughout the property and automatically adjusts the charge point’s power output accordingly. When household electrical usage increases, the monitoring device reduces charging power to prevent the main supply from exceeding its capacity. This intelligent load management protects circuit breakers from tripping and prevents potential damage to electrical equipment.
The load monitoring connection required a steel wire armoured data cable installation between the garage and the main property’s meter cupboard. This cable route follows the hedge-line to minimise visual impact whilst providing secure data transmission for the monitoring system. The installation includes a catenary wire system suspended between the main property and an existing telegraph pole, supporting the data cable across the span without ground-level obstacles.
Cable routing begins with a narrow trench at the garage end to navigate around the footpath, then transitions to overhead installation via the catenary wire system. The catenary wire provides mechanical support for the data cable whilst maintaining appropriate clearance heights for safety and access. Turn buckles allow precise tensioning of the catenary wire to prevent sagging and maintain proper cable support throughout varying weather conditions.
Additional data cable cores remain available within the installation to facilitate future monitoring of solar panel systems or battery storage installations. This forward-thinking approach provides infrastructure for expanding renewable energy systems without requiring additional cable runs or excavation work. The spare cores can accommodate monitoring signals from solar inverters, battery management systems, or other renewable energy equipment.
Electrical testing of the complete installation produces the required Electrical Installation Certificate, documenting circuit performance and safety compliance. This testing verifies proper earth continuity, insulation resistance, and circuit protection coordination. The certificate enables Building Control Notification submission, meeting regulatory requirements for electrical work notification.
The installation process required careful coordination between mechanical mounting, electrical connections, and data cable routing. Cleats secure the steel wire armoured cables along their route, preventing mechanical damage whilst maintaining neat cable management. The timber hooks provide secure attachment points for the catenary wire system, distributing load forces across structural elements.
Circuit protection utilises a Legrand circuit breaker within the garage consumer unit, providing appropriate overcurrent protection for the supply circuit. This protection device coordinates with the charge point’s internal protection systems to provide comprehensive electrical safety. The circuit breaker characteristic provides suitable protection for the mixed load types present in garage environments.
The MyEnergi Zappi charge point offers multiple charging modes including eco-charging that utilises excess solar generation when available. The unit’s display provides real-time information about charging status, power consumption, and system diagnostics. Smart connectivity enables remote monitoring and control through smartphone applications.
This installation demonstrates how modern EV charging infrastructure can integrate with existing electrical systems whilst providing protection against overloading. The load monitoring system represents current best practice for residential EV charging installations, automatically managing power distribution to prevent electrical system stress. The steel wire armoured data cable provides reliable communication between the charge point and monitoring equipment whilst offering mechanical protection against damage.
