What a demand profile shows
A demand profile represents the combined load expected at different points in time. Unlike a simple connected-load total, it recognizes that equipment does not necessarily operate simultaneously. This makes the profile useful for scenario planning, peak-period identification and operating-schedule studies.
How the generator works
Each equipment row contributes its entered demand while its schedule is active. The generator sums all active contributions at every selected interval. A normal operating schedule can therefore create a morning ramp, a daytime plateau, a lunch-period change, an evening peak or another pattern without assuming that every connected load runs together.
Schedule interpretation
For this planner, the entered start time is inclusive and the end time is the point at which the equipment stops contributing. An overnight schedule can be represented by using an end hour lower than the start hour, which means the load crosses midnight.
Why intervals matter
A 60-minute profile is useful for broad planning, while 15-minute intervals can reveal shorter peaks. A simulated profile is still only as detailed as the assumptions behind the schedule and load values.
Worked scenario
Suppose lighting contributes 12 units from 06:00 to 20:00, HVAC contributes 20 units from 09:00 to 18:00, and a pump contributes 15 units from 10:00 to 14:00. During the overlap from 10:00 to 14:00, the modeled total is 47 units. Before 09:00 and after 18:00, the profile is lower because fewer scheduled loads are active.
Interpreting the peak
The peak interval is the highest combined demand in the simulated profile. This is not automatically the site's real maximum demand. It is a scenario result driven by your entered schedules, so it should be compared with measured data where available.
Common mistakes
Do not confuse nameplate rating with actual operating demand. Do not assume equipment runs continuously simply because it is installed. Do not mix load units. Also avoid using a simulated schedule as proof of electrical capacity without checking actual service, feeder, panel and equipment conditions.
Safety and limitations
This tool is a scheduling simulation. It does not calculate conductor sizing, protection settings, fault current, thermal limits, power quality or code compliance. Real installations should be evaluated using actual equipment data and appropriate electrical design procedures.
Frequently asked questions
Can an equipment schedule cross midnight?
Yes. If the entered end hour is earlier than the start hour, the planner treats the equipment as operating across midnight.
Does the result represent measured demand?
No. It is a simulated profile based entirely on your entered assumptions.
Why use 15-minute intervals?
Shorter intervals can expose shorter modeled peaks that a one-hour profile could smooth over.
Can I use kW or kVA?
Yes, provided every equipment entry uses the same basis. The tool does not convert between them.