Performance metrics & physics
Solar Energy Transmitted
Solar energy transmitted is the fraction of incoming solar radiation that passes through a window film into the cabin or room — minimising this is the core purpose of solar film.
Solar energy is split among reflection, absorption (with subsequent re-radiation) and transmission. The transmitted fraction enters the cabin directly as heat.
Premium ceramic films minimise NIR transmission specifically — that's where most felt heat comes from. Visible transmission stays high to maintain VLT compliance.
The total solar energy rejection metric captures the full energy balance, not just transmission, so it accounts for the heat that escapes outward via the film's absorbed-and-re-radiated portion.