If you’re a builder in Hyderabad planning the DG setup for your apartment project, here’s the one question that will save you from a costly mistake:
Are you buying for common areas only — or are your buyers expecting backup in their flats too?
Most small apartment projects go with common area only. That means lift, staircase lighting, and bore motor. Sounds simple — but even this calculation trips people up.
A standard 10 HP lift motor draws about 7.5 kW running load — but at startup it hits 2.5 times that. Add a 3–5 HP bore motor and 2 kVA for common lighting, and your common area alone needs 15–20 kVA minimum.
Then buyers start asking about flat backup.
Partial backup — 3 fans, 6 lights, 1-2 plug points per flat — adds roughly 0.5 kVA per flat. For 20 flats that’s 10 kVA extra.
Full backup depends entirely on what the builder promises — with ACs it can go 2–3 kVA per flat or more.
Quick Sizing Reference — 20 Flat Apartment
| Backup Type | What’s Covered | Approx DG Size |
|---|---|---|
| Common Area Only | Lift + Bore + Lighting | 15–20 kVA |
| Common + Partial | Above + 3 fans, 6 lights, 2 plugs per flat | 30–40 kVA |
| Common + Full | Above + AC, all appliances per flat | 62.5 kVA+ |