Maximum Demand Calculator ^new^ -
Grab your last 12 utility bills. Find the highest "Demand" value. Compare it to the sum of your connected load. You will likely find you are paying for capacity you rarely use.
Convert to kVA (PF 0.90): ( 21.1 / 0.90 = ) The "Real" Calculator: Power Analyzer / Smart Meter Manual calculations are estimates. For accurate MD (and to verify your diversity assumptions), you need real data.
Write down every load’s nominal power. maximum demand calculator
To take control of this, you need a . What is Maximum Demand? Maximum Demand is the highest average load (usually measured over 15, 30, or 60-minute intervals) that a system draws during a billing period.
[ MD = (Load_1 \times DF_1) + (Load_2 \times DF_2) + ... + (Load_n \times DF_n) ] Grab your last 12 utility bills
Disclaimer: This guide provides estimation methods. Always consult a licensed electrical engineer for final design and safety compliance.
In the world of electrical engineering and facility management, Maximum Demand (MD) is a critical metric. It isn't just about keeping the lights on; it directly impacts your capital expenditure (cable/transformer sizing) and operational expenditure (electricity bills). You will likely find you are paying for
Where is the Demand Factor (or Diversity Factor). Standard Demand Factors (Reference Guide) | Load Type | Typical Demand Factor | Notes | | :--- | :--- | :--- | | Lighting (Office) | 0.75 – 0.90 | Fluorescent/LED | | Lighting (Warehouse) | 0.95 – 1.00 | High bay, always on | | General Power Outlets | 0.10 – 0.50 | Varies heavily by occupancy | | HVAC (Cooling) | 1.00 | Worst-case summer day | | HVAC (Heating) | 0.80 – 1.00 | Electric heat is high demand | | Lifts / Elevators | 0.40 – 0.60 | Largest motor only | | Motors (Continuous) | 1.00 | Pumps, compressors | | Motors (Intermittent) | 0.40 – 0.60 | Conveyors, cranes | | Kitchen Equipment | 0.40 – 0.70 | Not all used at once | The "Pro" Calculator Tool (Manual Method) If you don't have a power analyzer, use this systematic approach to estimate your MD.