14 July 2026 · 7 min read
Used DG Set Buying Guide
How to inspect, size and negotiate a used DG set purchase in Chennai without costly mistakes.
Size the set to real load, not guesswork
List your essential loads, add starting-current allowance for motors and lifts, then add roughly 20 per cent headroom. Oversizing wastes fuel and causes wet stacking; undersizing trips the set when you need it most.
Silent or open type
Hospitals, hotels and apartments need acoustic canopies to meet noise limits. Factories and construction sites can generally use open-type sets, which cost less for the same capacity.
Insist on a witnessed load test
Never buy on a no-load start. Watch the set take load and check voltage stability, frequency, exhaust smoke and any abnormal noise or vibration through the run.
Check the alternator, not just the engine
Buyers focus on engines and overlook alternators. Insulation resistance testing and AVR performance matter enormously — a rewind is an expensive surprise after purchase.
Verify documentation and emission norms
Ask for the purchase invoice, service records and details of the applicable CPCB emission norm at the time of manufacture, especially where local authorities require compliance.
Buy from an accountable dealer
Purchase from a used power generator dealer in Chennai that stands behind the machine after handover. KS & Co supplies a refurbishment record with every set and provides support after installation.
KS & Co is a trusted second hand generator buyer in Chennai and second hand generator dealer in Chennai. Call +91 99401 58227 for a free valuation, any hour of the day.