Bergen B36:45V16

The 9,015 kW block on Bergen's B36:45 platform at 48.7% electrical, whose 500 mg/Nm3 NOx tune converts to 90.4 ppmvd and needs SCR

Bergen B36:45V16 is one of 23 gas engines tracked in the SecondWatt catalogue, each with specifications, lead times and indicative secondary-market pricing.

Bergen B36:45V16 lean-burn gas engine: 9,015 kW at 60 Hz, 48.7% electrical, 500 mg/Nm3 NOx, Langley Holdings ownership and the US SCR requirement.

The Bergen B36:45V16 is the 16-cylinder member of the B36:45V platform, rated 9,015 kW at 60 Hz and 9,425 kW at 50 Hz. Bore is 360 mm and stroke 450 mm, the same geometry as the V20, with nominal electrical efficiency of 48.7% at maximum continuous rating and power factor 1.0. It runs at 720 r/min at 60 Hz and 750 r/min at 50 Hz. Bergen Engines AS is owned by Langley Holdings plc. Rolls-Royce signed the sale on 3 August 2021 at a stated enterprise value of EUR 63 million with proceeds of EUR 70 million, and Langley completed on 31 December 2021 stating a consideration of EUR 91 million. Both figures are published as they stand because neither party reconciles them. Bergen publishes no heat rate. From 48.7%, 3,600 divided by 0.487 is 7,392 kJ/kWh, or 7,006 BTU/kWh on a lower-heating-value basis. That is a computed figure, not a Bergen number. Two Bergen revisions disagree on this engine. The 2021 Rev D document gives 9,410 kW at 50 Hz and a dry weight of 142,000 kg; the 2024 fact sheet gives 9,425 kW and 144,500 kg. The 2024 figures are used here; buyers holding the 2021 document should expect the older values.

Why it matters

It is the closest published rating to the Wartsila 20V34SG at 9,015 kW against 9,388 kW at 60 Hz, which makes it the natural head-to-head in the 9 MW class. It carries the same category constraint as every engine here: 500 mg/Nm3 at 5% O2 is 90.4 ppmvd at 15% O2, above the 82 ppmvd federal ceiling.

Who buys it

Developers whose block size falls between the 34SG class and the V20, and industrial or island systems buying 9 MW increments. Every named Bergen US data center order to date is for the V20 rather than this engine, so the V16 is specified where site constraints or redundancy arithmetic favour a smaller unit.

Role in the data center

Bergen sells the B36:45 as a generator set with a Marelli Motori alternator, and its releases count units rather than describing plants. No named US data center order specifies the V16; both the Liberty Energy and E-Finity projects are V20. The V16 is therefore the engine to consider where the redundancy arithmetic or the site footprint favours a 9 MW step, not the engine with a US data center track record. Duty is continuous behind-the-meter generation rather than NFPA 110 standby.

Key specifications

Technical summary

Electrical output: 9,015 kW at 60 Hz, 9,425 kW at 50 Hz, maximum continuous at power factor 1.0. Nominal electrical efficiency: 48.7%. Configuration: 16-cylinder V, bore 360 mm, stroke 450 mm. Speed: 720 r/min at 60 Hz, 750 r/min at 50 Hz. Dimensions: 13,165 x 3,750 x 4,750 mm; dry weight 144,500 kg, per the 2024 fact sheet. NOx: 500 mg/Nm3 at 5% O2, engine-out, equal to 90.4 ppmvd at 15% O2. Reference fuel: natural gas, methane number 80, lower heating value 36 MJ/nm3. Revision note: the 2021 Rev D document gives 9,410 kW at 50 Hz and 142,000 kg. Fuel flexibility: hydrogen blends to 25% without modification on the B36:45 platform.

Major variations

The B36:45V platform ships in 12V, 16V and 20V, rating 6,750 kW, 9,015 kW and 11,280 kW at 60 Hz. No inline gas variant is offered on this platform. Bergen also builds the older B35:40V20AG at 9,065 kW at 60 Hz, a 350 mm bore engine that overlaps this rating. Bergen's fact sheet and product page state different efficiencies for it, 49% against 48.1%, so confirm the figure with Bergen before comparing it to this engine.

Pricing and availability

Comparable secondary-market band: 2000–3150 $ per kW installed. Trend: stable The hour meter sets the price in this category, not the year. An engine three years from a major overhaul is worth materially less than an older unit fresh out of one. No used engine at this size is publicly listed, so there is no used price band. Lead time, new: No published lead time, and no dated order specific to the V16. The V20 orders on the same platform ran roughly 14 to 18 months from announcement to first delivery. Treat that as a platform observation rather than a quotation for this engine.. Lead time, used or refurbished: No used engine at this size class is publicly listed, so no used lead time applies..

Lifecycle and maintenance

Bergen publishes no time-between-overhaul for the B36:45 platform. Maintenance is priced inside a service agreement rather than stated as a catalog figure, so total cost of ownership cannot be built from the nameplate. The plant-level availability evidence that exists is for the V20 rather than this engine. E-Finity's plant is configured n+3 across twelve V20 gensets and Langley markets 99.999% uptime for the Bergen and Piller combination. That is a vendor claim about a different configuration and should not be attached to the V16.

Thermal and emissions profile

Bergen publishes NOx at 500 mg/Nm3 at 5% O2, engine-out, against a reference fuel of methane number 80. Wartsila publishes 90 ppm at 15% O2 for the same class. They are the same number: 500 x 22.414/46 = 243.6 ppmv at 5% O2, then x (20.9-15)/(20.9-5) = 0.3711 gives 90.4 ppmvd at 15% O2. 40 CFR 60 Subpart JJJJ caps non-emergency spark-ignition natural gas engines of 500 HP or more, built on or after 1 July 2010, at 82 ppmvd at 15% O2. At 90.4 ppmvd the engine is above the federal ceiling, so selective catalytic reduction is required to sell it in the United States at all. Budget SCR as a capital line item, not an accessory. Ozone non-attainment areas push BACT or LAER far below the NSPS floor and add urea storage.

Common failure points

• Gas quality against the reference fuel — Retard and derate when delivered gas falls below methane number 80 or 36 MJ/nm3
• SCR catalyst and urea dosing system — Stack NOx climbs toward the 90.4 ppmvd engine-out equivalent and the permit limit is exceeded
• Cylinder heads and exhaust valves — Widening exhaust temperature spread across the 16 cylinders and falling compression on one bank
• Documentation revision mismatch — Delivered output or weight differs from the datasheet used at bid stage
• Charge air cooler fouling — Rising charge air temperature and progressive output derate below the nominal rating
• Lubricating oil condition — Rising iron, chromium and viscosity in oil analysis between changes

Inspection checklist

Confirm the revision on the documentation: Bergen's 2021 and 2024 sheets differ on output and weight for this engine. Hours since major overhaul: Bergen publishes no interval, so demand the service agreement schedule and the hour meter. Hours since top-end and head change-out: record per-bank hours across all 16 cylinders. Oil analysis trend across the last 12 samples: rising iron and chromium indicate liner and ring wear. Cylinder liner wear at top ring reversal: measure against the 360 mm nominal bore. Turbocharger shaft play and compressor wheel erosion: record the reading as a trend across at least 2 outages. Charge air cooler fouling: rising charge air temperature costs output against the nominal 9,015 kW at 60 Hz. Spark plug and ignition coil hours: log the current set across all 16 cylinders.

Procurement channels

Direct from Bergen Engines AS, built at the Hordvik factory north of Bergen, Norway. The facilities page lists twelve sales and service subsidiaries including the USA and Mexico. The documented US route to market runs through developer partners rather than a Bergen-branded dealer network, and Bergen does not publish its US service footprint by city or function. Establish the parts and service arrangement in writing before ordering.

Regional notes

Rated at both frequencies, 9,015 kW at 60 Hz and 9,425 kW at 50 Hz. North American channel is confirmed at company level through USA and Mexico subsidiaries and two US data center projects on the platform, though both of those projects specify the V20 rather than this engine.