Inputs

Connected lighting load W Enter a numeric project value in W at or above 0.1. Existing operating hours per day h/day Enter a numeric project value in h/day between 0 and 24. Occupied hours per day h/day Enter a numeric project value in h/day between 0 and 24. Sensor timeout min Enter a numeric project value in min between 0 and 120. Operating days per year days/year Enter a numeric project value in days/year between 0 and 366. Unoccupied-time reduction % Enter a numeric project value in % between 0 and 100. Energy tariff $/kWh Enter a numeric project value in $/kWh at or above 0. Sensor coverage confirmed Tick when this condition applies or the record is available. Emergency lighting or life-safety interaction present Tick when this condition applies or the record is available.

Controlled hours per day -- h/day

Existing annual kWh -- kWh/year

Controlled annual kWh -- kWh/year

Annual kWh saved -- kWh/year

Calculation details

Controlled hours per day: -- h/day
Existing annual kWh: -- kWh/year
Controlled annual kWh: -- kWh/year
Annual kWh saved: -- kWh/year
Annual cost saved: -- $/year
Coverage or emergency interaction review required: --

Important notes

Check sensor field of view, mounting height, partitions, nuisance switching, manual overrides, emergency lighting, commissioning, and user acceptance.
Electrical work, life-safety interactions, NCC assumptions, and Australian compliance implications need qualified review; this planner makes no automatic compliance claim.

Formulas

$\displaystyle h_c = h_o + (h_e-h_o)(1-r) + t/60$
$\displaystyle S = P(h_e-h_c)d/1000$
Sensor savings depend on actual occupancy, coverage, timeout, commissioning, and overrides.

Estimate occupancy sensor controlled hours, annual kWh savings, cost savings, and coverage review flags.

Occupancy Sensor Retrofit Savings Planner is a planning aid. Keep the target source, product data, measurement method, and project assumptions with the result. Confirm compliance, installation, certification, and safety decisions with the responsible professional.

Inputs

Results

Formulas