Lighting
Occupancy Sensor Savings Calculator
Occupancy Sensor Savings converts the entered electrical measurements into annual energy saved. Use it to the annual energy saved calculation.
Enter values for annual energy saved
Use one consistent electrical operating case for all fields.
How Occupancy Sensor Savings works
This worksheet evaluates savings = power × avoided hours. Occupancy Sensor Savings uses Controlled lighting power, Avoided operating hours to report Annual energy saved.
With the loaded values, annual energy saved evaluates to 2,250.00 kWh. Hold the remaining entries steady while testing an uncertain input.
Inputs for Occupancy Sensor Savings
Controlled lighting power and Avoided operating hours belong to Occupancy Sensor Savings. Keep source units with controlled lighting power. Voltage loss can be checked in LED Strip Voltage Loss Calculator.
The sample case is a worked example, not a design target.
- Controlled lighting power
- Example entry: 2.5 kW.
- Avoided operating hours
- Example entry: 900 h.
Reading the Occupancy Sensor Savings result
This output represents Occupancy Sensor Savings.
Compare the output with equipment limits and the applicable design margins. Use Lighting Wall-Plug Efficiency Calculator to a separate wall-plug efficiency calculation.
Measurement and units
Photometric results depend on fixture distribution, reflectance, mounting, maintenance, and the measured task plane. Check prefixes on controlled lighting power.
Record conversion choices so comparisons stay traceable.
Limits of this calculation
Measure actual schedule changes where possible.
Only the stated inputs participate in this simplified model. Unentered effects remain outside Occupancy Sensor Savings.
A useful Occupancy Sensor Savings comparison
Record annual energy saved before testing a different controlled lighting power value.
Document the alternate controlled lighting power source.
Questions about Occupancy Sensor Savings
What does Occupancy Sensor Savings calculate?
Occupancy Sensor Savings reports annual energy saved.
Can Controlled lighting power be zero?
For Occupancy Sensor Savings, measure any zero controlled lighting power directly.
Why can annual energy saved differ from measurement?
Measure actual schedule changes where possible. Recheck controlled lighting power.
Should the result be rounded?
Keep extra digits while comparing cases, then round to the precision supported by controlled lighting power.