Factory-Direct Manufacturing Since 1999

10-20 kW Twin Cylinder Silent Diesel Generators

Factory-direct twin cylinder silent diesel generators from ZC Power — engineered reliability, precise voltage stability, and genuine source-factory pricing. Air-cooled, sound-attenuated, and ATS-ready for commercial backup, telecom, and medical applications.

Request Factory-Direct Quote Explore Models
ISO9001 certified, exported to 50+ countries
Twin cylinder silent diesel generator in weatherproof sound-attenuated enclosure

12kW

Min Output

20kW

Max Output

≤75 dB(A)

Noise @ 7m

8-10h

Runtime @ 75% Load

“Whether you need backup power for a commercial building, prime power for a remote telecom site, or a quiet standby solution for a medical clinic, ZC Power’s air-cooled twin cylinder silent gensets deliver the balanced performance, low-noise operation, and long-term durability that single-cylinder alternatives cannot match.”

Verified by our national standard testing center — every unit, every time
Model Lineup

Twin Cylinder Silent Generator Models: 12-20 kW Range

Our twin cylinder silent diesel generator lineup spans four standard power ratings. All models feature air-cooled, 4-stroke diesel engines with electric start, sound-attenuated enclosures, and pure copper brushless alternators with automatic voltage regulation.

12 kW / 15 kVA — Compact Commercial Backup. The ideal entry point for small businesses. A 997cc twin-cylinder engine delivers 12 kW prime power (13 kW standby), with a 30L tank for roughly 8 hours at 75% load. Best for small offices, retail shops, residential backup, and compact workshops. Available in single-phase (220V) and three-phase (380V).

15 kW / 18.75 kVA — Mid-Range Versatility. The optimal balance of output and footprint, and our most popular commercial model. Its 1,247cc engine provides ample torque headroom for motor-starting applications — ideal for restaurants, medical clinics, mid-sized buildings, and telecom sites. ATS-ready with automatic switchover within seconds of grid failure.

18 kW / 22.5 kVA — Heavy Commercial Duty. Stepping up to the 1,326cc V-twin configuration for increased thermal capacity and sustained high-load performance. Balanced power strokes reduce vibration and mechanical wear — the workhorse for larger commercial buildings, small manufacturing, and construction site offices.

20 kW / 25 kVA — Maximum Twin Cylinder Output. The ceiling of air-cooled twin-cylinder power: 20 kW prime and 22 kW standby from the same V-twin platform, optimized for fuel efficiency and continuous duty. Extended tank options, three-phase output for industrial machinery, and optional cloud monitoring via smartphone.

Most Popular

“The 15 kW twin cylinder silent diesel generator is the most popular choice across our commercial client base — its 1,247cc engine handles motor-starting loads with ease, runs about 8 hours at rated load on a 30L tank, and switches over automatically within seconds of a grid failure when paired with an ATS.”

Not sure which model fits your load profile?

Speak with an Engineer
Twin cylinder silent diesel generators at ZC Power manufacturing facility

V-Twin

Balanced Power Design

Twin vs. Single Cylinder

Why Choose a Twin Cylinder Silent Diesel Generator?

For buyers evaluating generators in the 10-20 kW class, the fundamental decision is single-cylinder versus twin-cylinder configuration. While single-cylinder units serve lighter, intermittent applications, a v-twin diesel generator set delivers measurable advantages for commercial and industrial use.

Two pistons firing alternately produce smoother torque delivery — translating directly into lower vibration, reduced mechanical fatigue, and more stable electrical output, particularly important when powering sensitive electronics or variable load profiles. Twin-cylinder engines also produce a higher-frequency, less intrusive sound signature that is far easier to attenuate with enclosure design.

Lower Vibration Tighter Voltage Regulation Extended Service Life Softer Acoustic Profile
Head-to-Head

Single Cylinder vs. Twin Cylinder: The Measurable Difference

Feature Twin Cylinder (ZC Power) Single Cylinder
Power Range 10-20+ kW 5-10 kW
Vibration Lower — opposed piston movement cancels inertial forces Higher inherent vibration from a single piston
Noise Character Softer, more stable acoustics from higher combustion frequency Intermittent, rougher sound profile
Load Handling Superior for fluctuating and motor-start loads Best for stable, predictable loads
Continuous Operation Extended runtime with even heat distribution Limited; single-zone heat concentration
Voltage Stability Faster governor response; tighter voltage regulation Noticeable fluctuation under changing loads
Service Life Extended component life from reduced mechanical stress Adequate for occasional use
Engineered Excellence

Key Features & Engineering Advantages

Every ZC Power twin cylinder silent diesel generator is built around five core engineering principles: acoustic control, engine durability, electrical stability, intelligent monitoring, and field mobility.

Silent diesel generator in sound-attenuated enclosure installed beside a commercial building
Acoustic Control

Sound-Attenuated Acoustic Enclosure

ZC Power employs a multi-layer soundproofing system combining high-density acoustic foam with mass-loaded vinyl barriers, achieving operating noise levels of ≤75 dB(A) at 7 meters — comparable to normal conversation. A silent diesel generator 15kw model can operate adjacent to occupied buildings without disruption.

≤75 dB(A) noise level at 7 meters
Anti-vibration engine mounts isolate the power unit
IP23-rated weather-resistant powder-coated steel
Labyrinth intake & exhaust attenuators trap sound energy
Engine Durability

Air-Cooled Twin Cylinder Diesel Engine

The V-twin, 4-stroke, direct-injection diesel engine forms the heart of each genset. Air cooling eliminates the complexity, weight, and maintenance of a liquid cooling system — a practical advantage in the 10-20 kW class where simplicity and reliability are paramount.

Displacement range: 997cc (12 kW) to 1,326cc (18-20 kW)
Fuel efficiency as low as 205 g/kW·h under optimal load
Electric start with low-oil auto-shutdown protection
Direct injection for cleaner cold starts and lower fuel use
Air-cooled twin cylinder diesel generator deployed at a remote operations site

Need complete specs, dimension drawings, and performance curves?

Get Full Technical Datasheet
Applications

Applications — Where Twin Cylinder Silent Generators Excel

Commercial & Retail Backup

Keep point-of-sale systems, security cameras, refrigeration, and lighting operational through grid outages — without subjecting customers to the roar of an open-frame unit. Trusted by supermarkets, restaurants, and office buildings worldwide.

Benefit: Seamless backup power that customers never hear.

Healthcare & Medical Clinics

An ATS-ready twin cylinder silent diesel generator keeps refrigerated medications, sterilization systems, and surgical lighting running through any grid disturbance — while noise below 75 dB(A) preserves a calm patient environment.

Benefit: Absolute power reliability for critical medical equipment.

Telecom & Remote Sites

Cellular towers, relay stations, and monitoring outposts depend on generators that run unattended for extended periods. The twin-cylinder engine’s heat distribution and mechanical balance make it the preferred choice for continuous prime power.

Benefit: Unattended reliability where service visits are infrequent.

Construction & Job Sites

Wheel-mounted ZC Power gensets move easily across the site to power tools, lighting, and temporary offices, while the weather-resistant enclosure protects internal components from rain, dust, and job site debris.

Benefit: Rugged, repositionable power for demanding job sites.

Hospitality & Events

Hotels, resorts, and event venues share one requirement: backup power that guests never hear. Sound-attenuated design allows operation from service areas without disrupting weddings, conferences, or hotel guests.

Benefit: Uninterrupted hospitality regardless of grid conditions.

Agriculture & Farming

Irrigation pumps, grain dryers, and cold storage rely on dependable power during critical windows. Twin-cylinder torque handles high motor starting currents, while diesel efficiency manages costs through harvest and processing periods.

Benefit: High starting torque with low operating costs.
Full Specifications

Technical Specifications

Specification ZC-12kW ZC-15kW ZC-18kW ZC-20kW
Prime Power 12 kW / 15 kVA 15 kW / 18.75 kVA 18 kW / 22.5 kVA 20 kW / 25 kVA
Standby Power 13 kW / 16.25 kVA 16 kW / 20 kVA 20 kW / 25 kVA 22 kW / 27.5 kVA
Rated Voltage 220/380V 220/380V 220/380V 220/380V
Frequency 50 Hz (60 Hz opt.) 50 Hz (60 Hz opt.) 50 Hz (60 Hz opt.) 50 Hz (60 Hz opt.)
Phase 1-Phase / 3-Phase 1-Phase / 3-Phase 1-Phase / 3-Phase 1-Phase / 3-Phase
Power Factor 0.8 (3-ph) / 1.0 (1-ph) 0.8 (3-ph) / 1.0 (1-ph) 0.8 (3-ph) / 1.0 (1-ph) 0.8 (3-ph) / 1.0 (1-ph)
Engine Type 2-cyl, 4-stroke, air-cooled 2-cyl, 4-stroke, air-cooled V-twin, 4-stroke, air-cooled V-twin, 4-stroke, air-cooled
Displacement 997 cc 1,247 cc 1,326 cc 1,326 cc
Fuel Tank Capacity 30 L 30 L 30 L 30 L (ext. optional)
Runtime @ 75% Load ~8 hours ~8 hours ~8 hours ~8-10 hours
Noise Level @ 7m ≤75 dB(A) ≤75 dB(A) ≤75 dB(A) ≤75 dB(A)
Starting System Electric start Electric start Electric start Electric start
Dimensions (L×W×H) 1255×755×865 mm 1255×755×982 mm 1300×800×1000 mm 1300×800×1000 mm
Net Weight ~300 kg ~340 kg ~350 kg ~360 kg
Alternator Type Brushless, AVR, copper Brushless, AVR, copper Brushless, AVR, copper Brushless, AVR, copper
Insulation Class F F F F
Built to Your Specification

Customization & OEM/ODM Capabilities

As a source manufacturer operating a 300,000-square-meter production facility, ZC Power offers customization depth that trading companies cannot match. Every twin cylinder silent diesel generator can be configured to your exact technical and commercial requirements.

Voltage & Frequency

Any global grid standard — 110V, 120V, 220V, 230V, 240V, 380V, 400V, 415V, or 480V at 50Hz or 60Hz, configured at the factory as standard practice, not an extra-cost option.

Regional Socket Types

European Schuko, British BS 1363, American NEMA, Australian, South African, Middle Eastern, and other regional standards fitted to your market.

Distributor Branding

Custom paint colors (RAL or Pantone), laser-engraved logo panels, branded packaging, and personalized user manuals for your local market.

Control System Upgrades

Deep Sea Electronics (DSE) or SmartGen advanced controllers with expanded I/O for building management system integration.

Canopy & Fuel Options

Enhanced acoustic packages, marine-grade anti-corrosion coatings, extended-range base tanks, external bulk tank kits, and fuel transfer pumps.

Mobility Configurations

Road-towable trailer mounting with full lighting, braking, and tie-down systems for fleets that move between sites.

Generator sets undergoing load bank testing at ZC Power national standard testing center

100%

Full-Load Tested

Verified Quality

Factory-Direct Quality Assurance

What separates a ZC Power genset from thousands of B2B platform listings is verifiable quality — documented processes and physical testing infrastructure. Every unit undergoes full-load bank testing before shipment: connected to a resistive load bank and run at 100% rated output while engineers verify voltage, frequency, temperature, and oil pressure.

Our ISO 9001 quality system governs every stage — from incoming component inspection to pre-shipment documentation — with full serial number traceability linking every major component to its production batch and test records. Established in 1999, ZC Power has supplied 100+ successful projects across more than 50 countries.

ISO9001 CE Certified CCC Genuine Stamford / DSE / Schneider Components
Worldwide Delivery

Global Export & Lifetime Support

Purchasing heavy machinery from an overseas manufacturer involves legitimate concerns about logistics, documentation, and long-term service. ZC Power has structured its export operations specifically to address these concerns.

End-to-End Export Management

We handle the full logistics chain: factory loading, container securing, ocean or rail freight booking, and customs documentation — including Certificates of Origin, Form E/F for preferential tariffs, and commercial invoices.

FOB or CIF: we manage the process so you focus on your project, not paperwork.

Installation & Commissioning

Each 2-cylinder diesel generator ships with installation manuals, wiring diagrams, and pre-commissioning checklists. Our engineers guide your local electrician remotely through site preparation, cable sizing, ATS integration, and startup.

Benefit: on-site commissioning available for large-volume deployments.

Warranty & Parts

Standard warranty of 1 year or 1,000 running hours. Because we manufacture the genset, replacement parts ship directly from our inventory — with lifetime parts availability for all model generations via air or sea freight.

Benefit: factory-direct parts supply, no distributor supply chain.

80+ Technical Engineers

When you contact ZC Power with a technical question, you speak with engineers who understand the equipment at a design level — not a call center reading from a script.

Benefit: design-level engineering support for the equipment’s full lifecycle.
Testimonials

What Our Global Partners Say

“We run ZC Power’s 15kW twin cylinder silent gensets as backup for three of our clinics. The ATS switchover is seamless, and patients never notice the generator running. Their engineers guided our local electrician through installation remotely — flawless support.”

Dr. Sarah Chen

Metro General Hospital

Chief of Facilities

“Our telecom sites run unattended for months. The V-twin engines handle continuous prime power without the hot-spot problems we had with single-cylinder units. Fuel consumption came in below projections, and spare parts shipped directly from the factory within days.”

Mohammed Al-Rashid

Regional Telecom Infrastructure Group

Operations Director

“As a distributor, the OEM support is what keeps us with ZC Power — custom RAL colors, laser-engraved branding, and localized manuals for our market. Factory-direct pricing lets us compete, and their documentation makes customs clearance seamless every time.”

James Morrison

Pacific Rim Power Distribution

Procurement Manager

50+

Export countries served

≤75 dB(A)

Noise level at 7 meters

80+

Technical engineers supporting

25+

Years of manufacturing excellence

Our Process

From Initial Inquiry to Operational Power

A streamlined four-step process designed to get your twin cylinder silent generator deployed efficiently and effectively.

STEP 1

Technical Consultation

Our engineers analyze your load profile, voltage requirements, and site conditions.

STEP 2

Custom Configuration

We tailor voltage, sockets, controllers, canopy, and branding to your specification.

STEP 3

Full-Load Testing

100% load bank testing with complete documentation for customs and installation.

STEP 4

Global Delivery

Export logistics management with installation guidance and lifetime parts support.

STEP 1

Technical Consultation

Our engineers analyze your load profile, voltage and frequency requirements, and site conditions to recommend the right model.

STEP 2

Custom Configuration

We tailor voltage, socket types, control systems, canopy options, and OEM branding to your exact specification.

STEP 3

Full-Load Testing & Documentation

Your generator undergoes 100% load bank testing in our national standard facility, with complete documentation for customs and installation.

STEP 4

Global Delivery & Support

We manage export logistics and provide installation guidance, commissioning support, and lifetime aftermarket parts supply.

FAQ

Frequently Asked Questions

Twin cylinder generators use two pistons firing in alternating sequence, producing smoother power delivery with measurably lower vibration and a less intrusive noise profile. They occupy the 10-40 kW power band versus 5-10 kW for single-cylinder designs — offering clear advantages in voltage stability, mechanical longevity, and acoustic performance for commercial use.

ZC Power’s 15kW twin cylinder silent generators operate at ≤75 dB(A) at 7 meters — approximately the sound of normal conversation. The multi-layer enclosure with acoustic foam, mass-loaded vinyl barriers, and anti-vibration mounts reduces radiated noise by 20-35 dB compared to an open-frame generator of equivalent output.

Pricing depends on power rating, phase configuration, control system, and customization. As a factory-direct manufacturer, ZC Power eliminates the 20-40% markup typically added by trading companies. Contact our engineering team with your specifications for a customized quotation at source-factory rates.

Approximately 8-10 hours at 75% rated load on the standard 30L tank. Extended-range tanks and external fuel connection kits support 12-24 hours of continuous runtime. The V-twin engine’s balanced heat distribution sustains extended operation far more effectively than single-cylinder designs.

Yes. Every ZC Power genset is configured at the factory to your destination country’s grid specifications — 110V to 480V, 50Hz or 60Hz, single-phase or three-phase, with regional output sockets. This is standard manufacturing practice for us, not an extra-cost option.

When sourced from a certified factory-direct manufacturer with an in-house testing center and premium brand components, absolutely. ZC Power’s ISO9001 quality system, national standard testing center, authentic Stamford/DSE/Schneider components, and 25-year history since 1999 distinguish a genuine manufacturer from an unverified trading company.

Routine maintenance includes engine oil and filter changes every 100-250 operating hours (SAE 15W-40), air and fuel filter service, battery terminal inspection, and periodic checks of acoustic panels and door seals. A detailed maintenance schedule ships with each unit, and our engineers provide remote guidance for any procedure.

Prime power (PRP) is the maximum continuous output a generator can sustain for unlimited hours per year under variable load. Standby power (ESP) is the maximum output for emergency backup during grid outages — typically 10% higher, but limited to about 200 hours annually. Every ZC Power specification table states both ratings so you can size equipment accurately.

Latest Insights & Resources