Use this before your site visit. The purpose is to help you think about your own work so you can answer naturally — not to memorise a script.
In my process, Unit 312 is normally discussed during the site visit. I will use your actual work as the starting point and explore environmental practice, sustainability and relevant low-carbon / renewable technologies.
Be ready to explain the installation, your role and the stage of work.
Think about waste, packaging, offcuts, dust, noise, spills, unnecessary energy use, damage to materials or rework.
Explain the actual site/company arrangements: segregation, recycling, skips, hazardous/special waste where relevant and keeping the work area controlled.
Examples can include correct measuring, planning routes, ordering sensible quantities, protecting materials, reusing suitable items where permitted and avoiding damage/rework.
Use a real example from site where possible. Talk about controls, housekeeping and reporting problems.
Examples could include LED lighting, occupancy/PIR control, daylight control, timers, smart controls, efficient equipment or measures that reduce unnecessary consumption.
Think about safe operation, avoiding losses, reducing faults/rework, correct control, service life and efficient use of materials and energy.
Explain who you would report it to, what you could safely do within your responsibility and why you would follow company/site procedures.
You do not need to pretend you have installed every system. I may ask what you know, whether you have worked around it, and how it could relate to the property or project.
Be ready to explain, in simple terms, how PV panels generate DC electricity from daylight, how an inverter converts it for use on the installation, and how generation can be used on site, exported or stored where a battery is fitted.
Think about available roof/installation area, orientation, shading, structure, safe isolation, cable routes, inverter location, existing electrical installation and how the system will connect.
Explain that it transfers heat from outside air into the building's heating/hot-water system using electrical energy, rather than creating all of the heat directly like a simple resistance heater.
Possible points include correct sizing, building heat loss, flow temperatures, emitters/underfloor heating, controls, siting and outside conditions.
Examples: battery storage, EV charge points, ground source heat pumps, solar thermal, heat-recovery ventilation, smart controls and energy-monitoring systems. Only discuss what you genuinely know.
At a basic level, surplus generated energy can be stored for later use instead of being immediately exported, depending on the system design and controls.
Controls can help equipment run only when needed, avoid overheating/overlighting and reduce wasted energy while maintaining the required service.
What is it? → Why does it matter? → Give a real example → What did you do?
If you have not installed a technology, say so. Explain what you understand and keep your answer within your real experience.
