HVO for Standby Generators in Singapore: A Complete Guide
Singapore’s critical infrastructure — data centres, hospitals, commercial buildings, industrial plants — depends on reliable standby generator power. These generators typically run on diesel, burning hundreds or thousands of litres during tests and actual outages. Switching to HVO (Hydrotreated Vegetable Oil) renewable diesel is one of the fastest, lowest-risk ways to cut your facility’s Scope 1 carbon emissions — with no capital expenditure and no downtime.
Why Standby Generators Are Ideal for HVO
Unlike vehicle fleets with complex fuel logistics, standby generators have a single fixed fuel tank. This makes the transition to HVO exceptionally straightforward: you drain or consume the existing diesel, then refill with HVO. There is no mixed-fleet coordination, no route planning, no driver training required.
Generators also tend to sit with fuel for extended periods — weeks or months between test runs. HVO’s superior storage stability (up to 10 years, versus 1–2 years for FAME biodiesel) makes it particularly well-suited to backup power applications in Singapore’s hot, humid climate.
Generator OEM Compatibility
HVO meets EN 15940 (paraffinic diesel fuels standard) and has been approved for use by the world’s major generator engine manufacturers:
- Caterpillar — approves HVO (paraffinic diesel) use in Cat diesel engines per Cat guidelines
- Cummins — HVO approved across commercial diesel engine range
- Perkins — supports paraffinic diesel fuels meeting EN 15940
- MTU (Rolls-Royce Power Systems) — certified HVO use across MTU generator sets
- Kohler — HVO-compatible across commercial generator range
- Volvo Penta — EN 15940-compliant fuels approved
- MAN Energy Solutions — HVO approved for MAN engines
Always verify with your specific generator model’s technical documentation or contact your OEM representative. In most cases, HVO requires zero modification and is used exactly like conventional diesel.
ESG and Carbon Reporting Benefits
Singapore businesses face increasing pressure on carbon disclosure — from MAS climate-related financial disclosure requirements, from corporate sustainability commitments, and from the Singapore Green Plan 2030. Standby generator fuel is a direct Scope 1 emission source.
Switching a 2,000-litre generator tank from fossil diesel to HVO100 reduces the carbon intensity of that fuel by up to 90% per the ISCC or RSB sustainability certification attached to the HVO. This reduction is documentable, verifiable, and directly reportable in your GHG inventory under the GHG Protocol.
Example: A 500 kVA generator running a monthly 30-minute load test consuming approximately 60 litres of diesel produces around 159 kg CO₂e per year from tests alone. Switching to HVO100 reduces this to approximately 16 kg CO₂e — a saving of 143 kg CO₂e annually, with full certification documentation.
SCDF Storage Regulations for Generator Fuel in Singapore
Under the Singapore Civil Defence Force (SCDF) Fire Safety Act, diesel storage in buildings is subject to quantity limits and storage requirements. HVO is classified as a Class II flammable liquid (same as fossil diesel) with a flash point above 61°C, so it falls under the same regulatory framework as conventional diesel. No additional approvals or permits are required when substituting HVO for diesel in an existing approved generator fuel system.
For day tanks above 450 litres or bulk storage, ensure your existing SCDF fire safety permit covers the approved storage quantity. HVO does not change these requirements.
How to Transition Your Generator to HVO: 4 Steps
- Verify OEM approval. Confirm your generator’s engine manufacturer approves EN 15940 paraffinic diesel. For most modern commercial generators, this is already the case.
- Run down or remove existing diesel. Ideally, use up existing diesel through scheduled load tests before switching. If tank contamination or degraded fuel is a concern, drain and clean the tank first.
- Fill with HVO100. HVO can be delivered in 200L drums, 1,000L IBC, or bulk tanker formats. Standard diesel nozzles and pumping equipment are fully compatible.
- Update your fuel records. Note the change in your maintenance log, update your ESG fuel data tracking, and retain the HVO sustainability certificate (ISCC/RSB) for your carbon accounting records.
Frequently Asked Questions
Can I mix HVO with existing diesel in the tank?
Yes. HVO is fully miscible with fossil diesel in any ratio. You do not need to drain the tank before adding HVO — though for maximum ESG benefit (and maximum emission reduction), a full switch to HVO100 is recommended.
Does HVO affect generator maintenance schedules?
No. Engine wear, oil change intervals, and service schedules remain unchanged. HVO’s high cetane number (typically 70–90 vs ~50 for fossil diesel) can actually improve combustion efficiency and reduce particulate emissions.
What is the cost difference vs fossil diesel?
HVO carries a price premium over fossil diesel. The premium varies by volume and market conditions. Contact us for current bulk pricing — at scale, many Singapore operators find the ESG value and carbon accounting benefits justify the cost, particularly when carbon tax obligations are factored in.