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Generator Load and Starting Event Calculator

Compare actual running W/VA and simultaneous starting events with generator continuous, temporary and duration ratings; show candidates that fit.

Use this result well

Inputs that matter
Load sequence and generator rating basis, Loads and simultaneous starting groups, Actual generator candidates, Sources and assumptions
Output to expect
Generator running and starting-event comparison
  • Check the units and required inputs before comparing results.
  • Keep the assumptions with a copied result so you can reproduce the calculation later.
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Reference & details

How it works

Generator running and starting-event comparison

Compare a documented essential-load inventory and start-event groups with actual generator continuous and temporary ratings. Each start value is the load's TOTAL draw during startup, not extra starting watts. Loads sharing an event label are assumed to start together; all other listed loads are already running. VA totals are conservative sums of apparent-power magnitudes.

Event W/VA = total running W/VA + Σ(starting total − running) for the event group. Compare continuous W/VA, every event W/VA and its duration with the candidate ratings.

Updated: September 2026

Example Scenarios

Try the built-in example, then replace its source data with your actual documented values. Retain failed comparisons and unresolved decisions.

→ Candidate B — numeric load-envelope candidate

FAQ

Compare a documented essential-load inventory and start-event groups with actual generator continuous and temporary ratings. Each start value is the load's TOTAL draw during startup, not extra starting watts. Loads sharing an event label are assumed to start together; all other listed loads are already running. VA totals are conservative sums of apparent-power magnitudes.

Use the exact equipment, dimensions, current ratings, operating conditions and applicable requirements described in the selected mode. Unknown values are not replaced by a generic wire, device count or capacity. Illustrative examples are arithmetic examples, not an approved installation.

Save planning case keeps an explicit local history entry. Copy MD retains current inputs, source notes and interpretation; Download CSV exports the current result breakdown. Export a separate copy before changing devices or clearing browser storage.

About Generator Load and Starting Event Calculator

Compare a documented essential-load inventory and start-event groups with actual generator continuous and temporary ratings. Each start value is the load's TOTAL draw during startup, not extra starting watts. Loads sharing an event label are assumed to start together; all other listed loads are already running. VA totals are conservative sums of apparent-power magnitudes.