NCR + cost-saving advantage: Dual-fuel and gas-fired generators receive favorable treatment under CAQM Direction 76 (operations allowed during GRAP stages when diesel-only is restricted). Plus typical fuel cost savings of 30-55% vs diesel-only. Read NCR compliance guide →
Dual Fuel Generator Systems
Run your generator on PNG/CNG/LPG as primary, diesel as backup. Automatic fuel switching. Compatible with most existing diesel gensets via retrofit kit, or available as factory-built new unit.
Conversion Rs 1.5 - 60 lakh by kVA. Payback typically 6-30 months at moderate runtime.
Indicative Conversion Cost (Retrofit Existing Diesel Genset)
Cost to convert your existing diesel genset to dual-fuel operation. Includes dual-fuel kit + installation + commissioning + fuel-line integration up to genset boundary. Excludes gas pipeline run from utility line to genset (typically separate utility/contractor scope).
| Generator Capacity | Indicative Conversion Cost | Typical Payback Window |
|---|---|---|
| 25 - 100 kVA | Rs 1.5 - 4 lakh | 12 - 30 months |
| 100 - 250 kVA | Rs 3 - 8 lakh | 10 - 24 months |
| 250 - 500 kVA | Rs 6 - 15 lakh | 8 - 18 months |
| 500 - 1000 kVA | Rs 12 - 30 lakh | 6 - 14 months |
| 1000 - 2000 kVA | Rs 25 - 60 lakh | 4 - 10 months |
Bands reflect typical 2024-26 retrofit conversion quotes for kits compatible with Cummins, KOEL, Greaves, Mahindra Powerol diesel platforms. Payback windows assume PNG is the primary fuel and genset runs 500-2,000 hours/year at 60-80% load. Final quote depends on genset brand/model compatibility, gas type (PNG/CNG/LPG), site infrastructure readiness.
Indicative Cost for New Factory-Built Dual-Fuel Generator
If you are buying new instead of converting, factory-built dual-fuel gensets are typically 20-30% pricier than diesel-only equivalents but come with full OEM warranty and integrated controls.
| Capacity | Indicative New Price |
|---|---|
| 25 - 100 kVA | Rs 4 - 10 lakh |
| 100 - 250 kVA | Rs 10 - 25 lakh |
| 250 - 500 kVA | Rs 22 - 50 lakh |
| 500 - 1000 kVA | Rs 45 lakh - 1.1 cr |
| 1000 - 2000 kVA | Rs 1 cr - 2.4 cr |
Compare against our diesel-only CPCB IV+ pricing to see the dual-fuel premium for your kVA. For most buyers at 250 kVA+ with confirmed gas availability, the premium is recovered in 12-24 months of operation.
Fuel Cost Per kWh - The Honest Comparison
What you actually pay per unit of electricity generated. Reference rates as of May 2026 in North India. Local pricing varies with utility tariffs and bulk supply contracts.
| Fuel | Cost per kWh (delivered) |
|---|---|
| Diesel (baseline) | Rs 21 - 25 |
| PNG (Piped Natural Gas) | Rs 11 - 14 |
| CNG (Compressed Natural Gas) | Rs 14 - 17 |
| LPG (Liquefied Petroleum Gas) | Rs 18 - 22 |
Use our free DG Running Cost Calculator with your specific kVA + runtime to get a personalized cost picture. Add 8-12% for maintenance + 4-6% for AdBlue/oil to convert fuel cost to full running cost per kWh.
Four ROI Scenarios - When Dual Fuel Actually Pays Off
Real conversion economics across four common operator profiles. Payback gets dramatically better as runtime and capacity scale up.
250 kVA @ 500 hrs/year (typical commercial backup)
Good fit if PNG is already at site or pipeline within 200m
500 kVA @ 1,000 hrs/year (high-runtime industrial)
Strong payback. Many North India factories at this profile already converted.
1000 kVA @ 1,500 hrs/year (data center, large manufacturing)
Best payback profile. Often combined with paralleling switchgear upgrade.
2000 kVA @ 2,000 hrs/year (large manufacturing campus)
Exceptional payback. Capex often funded from year-1 fuel savings alone.
Scenarios assume PNG availability at site, 60-80% load factor on genset, and current May 2026 fuel pricing. Payback shortens significantly when diesel prices rise (sensitivity analysis available on request). Send your specific kVA + runtime + location for a personalized payback model.
PNG / Gas Infrastructure Availability - NCR + Rajasthan Zones
Dual fuel only makes sense if gas is actually available at your site. Here is what we observe on the ground in our service area.
| Zone | Gas Operator(s) | Availability |
|---|---|---|
| Bhiwadi RIICO Phase I-IV | GAIL Gas / Adani Gas | Active |
| Gurgaon (Sectors 1-90) | Indraprastha Gas (IGL) | Extensive |
| Faridabad | IGL | Active |
| Manesar / IMT | GAIL / Hindustan Petroleum | Growing |
| Noida / Greater Noida | IGL | Extensive |
| Ghaziabad | IGL | Active |
| Neemrana / Khushkhera / Bawal | GAIL | Growing (zone-specific) |
| Alwar / Jaipur | GAIL / Adani Gas | Selective coverage |
We can verify PNG availability at your specific plot by checking with the local utility on your behalf during the free site assessment. For sites where PNG pipeline is over 200m away, CNG bulk delivery or LPG bulk supply are interim alternatives until pipeline reaches you.
Convert Existing or Buy New Dual-Fuel?
Honest framing - when conversion is the right call vs when buying new is smarter. Four common scenarios we see in the market.
Existing diesel genset under 5 years old, healthy condition, capacity right for current load
Conversion preserves your existing capex. Payback typically 6-30 months. Engine reliability maintained with OEM-approved kit.
Existing diesel genset over 10 years old, near major overhaul anyway
Replacement timing aligns with conversion need. New CRDI engine + factory dual-fuel = better long-term TCO. Trade-in via buyback covers part of cost.
New facility under construction, gas line confirmed available
Factory-built dual fuel cheaper than future retrofit. Civil + electrical sized correctly upfront.
Site has uncertain gas availability or pipeline 1+ km away
PNG pipeline run cost is high (Rs 8-25 lakh per km). Consider CNG bulk delivery to start, switch to PNG when zone is energized.
What's Needed at Your Site (Beyond the Genset)
Dual fuel requires more than just the conversion kit. Plan for these infrastructure additions.
Gas Pipeline Connection
From utility line to genset boundary. Cost Rs 2-15 lakh depending on distance and pipe specification.
Pressure Regulating Station
Drops utility pipeline pressure to genset-acceptable level. Mandated by gas utility (PNG line at 4-19 bar; genset needs 0.05-0.2 bar).
Gas Filter + Metering
Filter for particulate removal + utility meter for consumption billing. Typically supplied by gas operator.
Fire Safety + Sensors
Gas leak detection sensors, fire alarm interlock, ventilation enhancement per gas operator safety code.
Updated AMF Panel
Existing AMF panel may need updates to handle dual-fuel switching logic + alarms. Typically Rs 25,000 - 1 lakh modification cost.
Civil + Electrical Permits
Local body permission for gas connection + Chief Inspector of Factories/PESO approval where applicable. We help with documentation.
Annual Inspection
Mandatory annual safety inspection by certified gas-fitter. Cost Rs 5,000-15,000/year (compliance, not optional).
Operator Training
Plant operator briefing on gas safety, alarm response, manual switchover. Included with our installation scope.
Dual fuel is one of three compliance paths for NCR operators
Dual fuel conversion is one option. The other two are RECD retrofit on your existing diesel genset, or new CPCB IV+ diesel replacement.
Best path depends on your runtime, age of existing unit, capacity, gas availability, and budget.
Continue Exploring Alpha Diesels
Authorized Greaves Cotton (diesel generators) and Kirloskar Pneumatic (air compressors) dealer. 25+ years serving North India.
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Frequently Asked Questions
Common questions about dual fuel generator systems
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