What Size Generator Powers an Office?
Offices are one of the easiest environments to size a diesel generator for — the load is predictable, and most of it is electronic and HVAC. Here's what Mecwel Engineers typically recommends for offices in Guwahati and across Assam.
Small office (up to 1,500 sq ft, 5–15 people)
Typical load: 5–8 ACs of 1–1.5 TR, 15–20 computers, printer, router, lights, one small refrigerator.
Recommended DG set: 15–25 kVA single-phase or three-phase silent diesel generator. Greaves 15 kVA or 20 kVA silent units are the popular pick.
Medium office (1,500–5,000 sq ft, 15–50 people)
Typical load: central AC or multi-split system, 40–60 workstations, small server rack, water dispensers, lift for 2 floors, pantry.
Recommended DG set: 40–62.5 kVA three-phase silent diesel generator. A 50 kVA Greaves unit comfortably runs a full mid-size office with headroom for growth.
Large office (5,000–15,000 sq ft, 50–150 people)
Typical load: full HVAC, server room with precision AC, dozens of ACs, lift bank, CCTV, access control, biometric, large pantry, boardroom AV.
Recommended DG set: 82.5–160 kVA three-phase silent diesel generator with AMF panel. A 125 kVA Greaves unit is our most-quoted size for full-floor corporate offices in Guwahati.
IT park / multi-tenant office building
For multi-tenant offices or IT parks, sizing is done floor-by-floor plus common utilities (lifts, pumps, lighting, chillers). Typical range: 250–500 kVA with a synchronised bank of two DG sets for redundancy.
Don't forget the essentials-only mode
For most offices we recommend two separate distribution boards on the DG side — one for essentials (server, key ACs, lights, one lift) and one for full load. If the DG is undersized or fuel needs to be conserved, essentials-only mode keeps the business running.
Get a right-sized quote
The numbers above are typical, not universal. A dental clinic and a design studio of the same square footage can have very different loads. Mecwel Engineers offers a free load survey in Guwahati — we clamp-meter your actual peak, then quote the right Greaves DG set.
Ready to power your business? Get a free quote from Mecwel Engineers — Guwahati's authorized Greaves Cotton dealer since 1991. Call +91 97060-11988 for on-site load survey and pricing across Assam.