DG Set Size (kVA) Calculator for Hotels

How to use the free DG Set Size (kVA) Calculator for Hotels

1. Enter your figures in the fields above – use real numbers from your PMS, channel manager or accounts.
2. Tap the button to see the result instantly. Change any value to compare scenarios.
3. Copy, print or save the result and use it in your daily or monthly review.

This DG Set Size (kVA) Calculator for Hotels runs fully in your browser on mobile or desktop – no sign-up and nothing is uploaded. Free DG set size calculator for hotels. Add room, kitchen, lift and pump loads, apply diversity and power factor, and get the standard kVA rating to buy.

How to size a DG set for a hotel

A diesel generator that is too small trips the moment the lifts and ACs start together; one that is too large burns diesel at light load and suffers from wet stacking. The right size starts from the connected load of everything the DG must back up, then applies a realistic diversity factor, because not every AC, geyser and kitchen appliance runs at the same moment.

1. List the load per room: AC, lights, TV, fridge and geyser. Use the name-plate kW where possible.
2. Add common area lighting, kitchen, lifts, water pumps and the STP blowers.
3. Apply a diversity factor. Hotels commonly use 50 to 70%; a resort in a hot region at full occupancy will sit at the higher end.
4. Convert kW to kVA by dividing by the power factor, normally 0.8 for DG ratings.
5. Add headroom for motor starting current and future expansion, then choose the next standard kVA rating.

Worked example

A 40-room hotel at 2 kW per room has 80 kW in rooms plus 53.5 kW of common, kitchen, lift and pump load: 133.5 kW connected. At 60% diversity the running load is 80.1 kW, which is 100.1 kVA at 0.8 PF. With 20% headroom it needs about 120 kVA, so a 125 kVA set is the next standard size.

Practical points

• DG sets run most efficiently at roughly 60 to 80% load. Two smaller sets can suit properties with big day and night load swings.
• Decide whether all AC load must be backed up. Many hotels back up only rooms and essentials, which cuts the size sharply.
• Check rules on acoustic enclosures, stack height and emission norms with your state pollution control board.

Once you pick a size, estimate running cost with the DG diesel consumption calculator and schedule servicing with the hotel maintenance checklist generator. This tool gives a planning estimate only; always confirm the load study and DG rating with a qualified electrical engineer.

Frequently asked questions