Duplex Series

Twin Generator Solutions

The ElectroQuell Duplex Series houses two complete generator sets within a single shared enclosure — delivering N+1 redundancy, fuel efficiency, and maintenance continuity in a footprint smaller than two separate installations.

What Is the Duplex Series?

Duplex Series twin generator enclosure

The Duplex Series is a twin-generator concept: two fully independent generator sets — each with its own engine, alternator, and control system — sharing a common sound-attenuated enclosure and output busbar. The two units work together to provide continuous, redundant power from a single integrated system.

Three Operating Modes:

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    Both generators running: Full combined capacity available — ideal for peak load periods or maximum redundancy requirements.

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    One generator running: Standard operating mode — one unit carries the load while the second remains on hot standby, ready to start within seconds.

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    Alternating operation: The system automatically alternates between generators at configurable intervals — equalizing running hours and extending overall engine life.

Twin Power Advantages

The Duplex Series solves three of the most common challenges in backup power installations:

  • Wet Stacking Elimination

    Problem: A large single generator running at low load risks wet stacking — unburned fuel deposits that damage the engine over time.

    Solution: The Duplex system runs one smaller generator at optimal load, eliminating wet stacking while keeping the second unit on standby.

  • Minimal Footprint

    Problem: Two separate generator enclosures require significantly more space than a single unit.

    Solution: The shared Duplex enclosure houses both generators in approximately 60% of the space required by two individual installations.

  • Zero-Downtime Maintenance

    Problem: Servicing a single generator requires taking the entire backup power system offline.

    Solution: With the Duplex Series, one generator can be fully isolated for maintenance while the other continues supplying power — no service interruption.

Duplex Operating Modes

  • Mode A

    Standby Redundancy

    Scenario: Standard N+1 backup power

    Generator A runs continuously, carrying the full facility load. Generator B remains on hot standby, monitoring the busbar. On failure of Generator A, Generator B starts and assumes load within seconds.

  • Mode B

    Parallel Load Sharing

    Scenario: High load or maximum availability

    Both generators run simultaneously, each carrying 50% of the load. This mode provides the highest level of resilience — any single generator fault results in only a 50% load reduction, easily managed through load shedding.

  • Mode C

    Timed Alternation

    Scenario: Equal runtime and maintenance scheduling

    The control system alternates between Generator A and Generator B at programmed intervals — ensuring equal running hours, synchronized maintenance schedules, and maximum long-term reliability.

Applications

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    Healthcare & Life Safety: Hospitals and care facilities require continuous power without exception. The Duplex Series meets life-safety power standards with automatic, seamless generator transfer.

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    Data Centers & Colocation: Data centers demand concurrent maintainability. The Duplex Series delivers N+1 redundancy within a single system, simplifying infrastructure while meeting Tier III+ requirements.

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    Construction & Temporary Sites: For construction projects requiring reliable backup power in a compact, transportable form, the Duplex Series containerized units can be deployed and relocated efficiently.

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    Telecommunications: Telecom base stations and network infrastructure require 24/7 uptime. The Duplex Series provides the reliability and automatic failover essential for communications continuity.

Duplex Series generator installation

Technical Features

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    Acoustic Enclosure: The shared enclosure provides sound attenuation for both generators simultaneously — reducing noise levels suitable for urban and residential adjacent sites.

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    Independent Circuit Breakers: Each generator has its own output circuit breaker and control panel, enabling complete electrical isolation of either unit without affecting the other.

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    Matched Alternators: Generator sets are matched with compatible alternators to ensure clean, synchronized parallel operation without waveform distortion or voltage instability.

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    Shared Weatherproof Enclosure: The common enclosure provides IP54-rated weather protection, integrated ventilation management, and optional climate control for operation in extreme temperatures.

Frequently Asked Questions

Related Solutions

Duplex generator installation background

Ready for Redundant Power in a Compact Package?

Talk to our Duplex Series specialists about twin-generator solutions tailored to your power requirements, site constraints, and redundancy objectives.