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Idle electricity savings calculator

Put a dollar figure on an always-on load. Enter kW, runtime and your own $/kWh and demand charge to see what it costs your factory over a year.

What it asks for: idle load (kW) · idle hours a year · $/kWh · demand charge ($/kW-month).

Run the numbers

What idle electrical load costs

Energy and demand, priced separately — because demand is set by your worst fifteen minutes of the month, not by the month.

kW still drawn when nothing is being made — the overnight floor on your trace
nights, weekends and shutdowns added up
dollars per kWh — from your own bill
dollars per kW-month — only counts if this load is also what sets your monthly peak. Set it to 0 if it isn’t.

These controls need JavaScript to recalculate. The figures beside them are the worked example at the constants listed below — real arithmetic, just not yours yet. Send us your numbers at info@quantifyenv.com and we will run them.

What it costs you

$50,589/yr

  • 337,500kWh a year, at idle
  • $40,500of it is energy
  • $10,089of it is demand
Annual cost of an idle electrical load
YOUR NUMBERS25 kW: 16,863 $/yr50 kW: 33,726 $/yr75 kW: 50,589 $/yr150 kW: 101,178 $/yr300 kW: 202,356 $/yr16,86333,72650,589101,178202,356
YOUR INPUTS · YOUR RATES · CANADIAN DOLLARS

Conservative arithmetic, verified against your own utility bills. Your number comes from your own meters.

The assumptions behind this
  • electricity.blendedRate — 0.12 $/kWh[TOM-REVIEW]Ontario Class B blended rate as used in Quantify's own teleprompter ('6,000 hours a year at $0.12/kWh') and concept footnotes. VERIFY against the current IESO/OEB Class B blended rate.
  • electricity.demandChargeRate — 11.21 $/kW-month[TOM-REVIEW]Alectra Utilities, Guelph Rate Zone, General Service 50–999 kW interval-metered (Class B) — OEB-approved Tariff of Rates and Charges effective 2026-01-01, Rate Order EB-2025-0055. Distribution volumetric $3.4474 + low-voltage $0.0257 + 2026 riders $0.0893 net + Retail Transmission Network $4.5377 + Line and Transformation Connection $3.1058 = $11.2059/kW-month. Typical range across urban Ontario LDCs is $10.50–$13.00; Toronto Hydro bills on kVA (~$19 equivalent) and Hydro One rural reaches ~$28. CLASS B ONLY — a Class A customer's economics are dominated by Global Adjustment, not by this charge.

Every constant used here shows its source under the result. [TOM-REVIEW] before launch (§G.2). Nothing is hard-coded in a component — the constants live in src/data/benchmarks.json and the city rates in src/data/water-rates.json.

Where these numbers come from

Every constant, its value, and the document it was read out of.

  • electricity.blendedRate — 0.12 $/kWh[TOM-REVIEW]Ontario Class B blended rate as used in Quantify's own teleprompter ('6,000 hours a year at $0.12/kWh') and concept footnotes. VERIFY against the current IESO/OEB Class B blended rate.
  • electricity.demandChargeRate — 11.21 $/kW-month[TOM-REVIEW]Alectra Utilities, Guelph Rate Zone, General Service 50–999 kW interval-metered (Class B) — OEB-approved Tariff of Rates and Charges effective 2026-01-01, Rate Order EB-2025-0055. Distribution volumetric $3.4474 + low-voltage $0.0257 + 2026 riders $0.0893 net + Retail Transmission Network $4.5377 + Line and Transformation Connection $3.1058 = $11.2059/kW-month. Typical range across urban Ontario LDCs is $10.50–$13.00; Toronto Hydro bills on kVA (~$19 equivalent) and Hydro One rural reaches ~$28. CLASS B ONLY — a Class A customer's economics are dominated by Global Adjustment, not by this charge.

Want the real number instead of the estimate?

This page gives you an estimate from numbers you already half-know. A meter gives you the real one. We will walk your floor, tell you what is worth measuring first, and put a figure on it — no charge, no obligation.

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