Step-by-Step Generator Load Sizing for UAE Projects: Your Practical Calculation

1. STEP-BY-STEP GENERATOR LOAD SIZING FOR UAE PROJECTS: YOUR PRACTICAL CALCULATION GUIDE Choosing the right diesel generator for homes, businesses, or construction sites in the UAE starts with a careful and accurate load calculation. With the region’s unique climate and diversified power requirements, proper sizing ensures reliable backup, optimal fuel use, and compliance with local regulations. 1. List Every Electrical Device Begin by creating a comprehensive inventory of all appliances, machinery, and systems that will rely on generator power. Group these into: Essential loads (devices that must stay powered during outages, like lights, AC units, servers, pumps, and security systems) Non-essential loads (items you can switch off if needed) This step is crucial for both residential setups (villas, offices) and commercial projects (factories, retail, high- rise buildings).

2. 2. Record Power Ratings Check each device’s power specifications. You’ll see ratings in either: Watts (W) or kilowatts (kW)—the real power consumed kVA (kilovolt-amperes)—apparent power, which includes the power factor To convert kW to kVA, divide by the average power factor (typically 0.8 for generators). Formula: kVA = kW Power Factor kVA = Power Factor kW 3. Account for Start-Up and Surge Loads Some equipment, especially motors and air conditioners, require extra power when starting up—a surge or inrush load. Factor these by multiplying rated power by a start-up factor (e.g. 2 for easy start, 4 for heavy start motors). Group high-starting-current loads (like pumps, cranes, compressors) together, as starting multiple at once dramatically increases demand. 4. Apply Simultaneity and Diversity Factors Not all equipment operates simultaneously. The simultaneity (diversity) factor estimates which loads will run together, usually expressed as a percentage. Adjust your totals so the generator isn’t oversized for rare peak events, but robust enough for expected real-world usage. 5. Add a Safety Margin for UAE Conditions Hot UAE summers impact generator efficiency: units should be derated by 10–15% for ambient temperatures over 40°C.

3. After calculating the required running and surge loads, multiply by 1.1–1.25 (10–25% margin) to guarantee reliable performance in local climate and allow for future growth. 6. Select the Right Generator Model Once you have the final kVA figure, choose a generator model close to but not below your calculated need. Consider: Brand reputation and service support in the UAE Prime vs. standby (continuous vs. emergency) rating Single- or three-phase supply Local compliance standards For large or complex facilities, consult with UAE generator experts for a detailed site assessment and tailored recommendations. Summary Proper generator sizing in the UAE isn’t just technical—it protects your business from outages, controls operational costs, and ensures safe, efficient backup power. Use this structured approach or work with specialists to guarantee performance year-round, whatever your project scale.