Don't Guess, Calculate: Sizing Your Power Solution Correctly

Selecting a generator that is too small leads to overload and failure. One that is too large is inefficient and wastes capital. This คู่มือการซื้อ will help you correctly size a diesel generator set for your business in Vietnam's unique climate.

Step 1: List Your Essential Loads

Make a list of EVERYTHING you need to power during an outage. For an office, this includes lights, computers, servers, and air conditioning. For a factory, it's critical machinery.

Step 2: Calculate the Total Power Requirement (kVA)

Each appliance has a power rating in Watts (W) or kilowatts (kW).

• Find the starting and running wattage for motors and compressors (A/C units), as starting wattage can be 3x higher.
• Sum the running wattage of all resistive loads (lights, computers).
• Add the highest starting wattage to the sum of all other running wattages.
• Convert total kW to kVA by dividing by a power factor (typically 0.8). Total kVA = Total kW / 0.8

Step 3: Consider Future Expansion

Add a buffer of 20-25% to your calculated kVA to accommodate future growth and ensure the generator isn't constantly running at 100% capacity, which prolongs its life.

Example for a Small Factory:

Assume you have machinery (10kW running, 30kW starting), lighting (5kW), and office equipment (3kW).
Total Load = (30kW starting) + (10kW + 5kW + 3kW - 10kW* for the machine already counted in starting) ) = ~38kW.
Total kVA = 38kW / 0.8 = 47.5 kVA. With a 25% buffer, you would look for a ~60 kVA generator.

For accurate sizing and a quote on a reliable silent or open frame unit, it's always best to contact us for a professional assessment.