Bidirectional
AMETEK Programmable Power’s bidirectional solutions offer flexible, high-performance power for applications requiring both sourcing and sinking capabilities. These systems support regenerative operation, enabling efficient energy recovery and seamless mode transitions. Ideal for battery testing, battery simulation, renewable energy systems, and advanced R&D, our bidirectional platforms deliver scalable power, precise control, and reliable performance across a wide range of industries.
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Mi-BEAM Series
Current: 5 to 150A
Power: 12 to 37kW
Overview: High Performance, Modular Bidirectional, Regenerative, Programmable DC Power System

i-BEAM Series
Current: ±1,000 A; Parallel up to ±2,000 A
Power: Single system power up to 650 kW; Parallel system power up to 1.3 MW
Overview: High Performance, Bidirectional, Regenerative, Programmable DC Power System

Sequoia Series
Regenerative AC Grid Simulator
Voltage: 0 - 333VACCurrent: 0A - 3,000Arms/phase
Power: 15kVA - 1.08MVA
Overview: Precision Programmable Regenerative Grid Simulator
Frequently Asked Questions
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What is a bidirectional power supply?
A bidirectional power supply can both source power to a device and sink/absorb power from it, enabling charge/discharge workflows without switching between separate instruments.
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What is a regenerative power supply?
A regenerative power supply is designed to return absorbed energy back to the facility/AC mains rather than dissipating it as heat during sink/load operation.
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Why choose AMETEK Programmable Power for bidirectional applications?
AMETEK Programmable Power positions its bidirectional solutions for applications that require both sourcing and sinking with regenerative operation, targeting battery testing/simulation, renewable energy systems, and advanced R&D.
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What applications are bidirectional DC power supplies best for?
Bidirectional systems are commonly used for battery simulation, battery testing (charge/discharge), and testing modern power electronics where energy can flow back from the DUT.
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What’s the difference between a bidirectional DC power supply and a battery cycler?
A bidirectional DC power supply provides the core capability to source and sink power in one platform, while a battery cycler is typically a battery-test-focused solution/configuration optimized for repeatable charge/discharge cycling workflows. AMETEK Programmable Power’s Battery Cycler hub explicitly frames Mi‑BEAM and i‑BEAM as battery cycling solutions with bidirectional source/sink capability.
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What is a 2 quadrant power supply (two‑quadrant) and how is it used in bidirectional DC testing?
A 2 quadrant power supply (two‑quadrant / source‑sink) typically operates at positive voltage while allowing current in both directions—it can source current (charge) and sink current (discharge). This is commonly used for battery and regenerative DUT testing where the device can return energy during discharge or deceleration events.
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Is “bidirectional power supply” the same as “regenerative power supply”?
Not always. Bidirectional refers to the ability to source and sink power (two-way flow), while regenerative refers to the ability to return absorbed energy to the mains instead of dissipating it as heat. Many bidirectional systems are regenerative, but the terms describe different aspects of capability.
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What does “source and sink” mean in bidirectional DC power supplies?
“Source” means delivering power to the DUT, and “sink” means absorbing power from the DUT (electronic-load behavior). Bidirectional systems combine these functions in one platform and are commonly used when a DUT can both consume and return energy.
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How do I pick between Mi‑BEAM, i‑BEAM, and Sequoia for my application?
Choose based on DC vs AC/grid simulation and power level:
- Mi-BEAM is positioned as a modular bidirectional regenerative programmable DC platform (12.5–37.5 kW range) with high-voltage options and parallel scalability.
- i‑BEAM is positioned for higher-power bidirectional regenerative DC testing with scalable system power and multi-channel options.
- Sequoia is positioned as a regenerative grid simulator / four‑quadrant bidirectional AC source for grid-connected testing (e.g., inverters, V2G/EVSE, UPS) with disturbance simulation.
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Can AMETEK bidirectional systems scale to megawatt-class test benches?
Yes. AMETEK states Mi‑BEAM is scalable up to 1.2 MW with parallel systems, and i‑BEAM is scalable up to 1.3 MW with parallel systems.
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What control interfaces matter for automated bidirectional testing?
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When do I need multi-channel bidirectional testing (1 vs 2 vs 4 channels)?
Use multi-channel when you need to test multiple DUTs, run parallel test steps, or supply multiple rails/strings simultaneously. AMETEK Programmable Power’s i‑BEAM explicitly supports single-channel, 2-channel, and 4-channel configurations, making it relevant for multi-channel test benches.
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How do bidirectional supplies support EV powertrain/inverter validation?
EV power electronics testing often requires equipment that can deliver and absorb energy during dynamic conditions. AMETEK Programmable Power positions Mi‑BEAM for electric powertrain testing, and Sequoia for testing grid-connected and EV power electronics contexts such as V2G/EVSE and inverter-related applications.
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When should I choose Sequoia instead of a bidirectional DC supply?
Choose Sequoia when you need a grid simulator / bidirectional AC source to simulate AC line conditions, disturbances, and grid-tied behavior for equipment like solar inverters, UPS systems, or V2G/EVSE testing.
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Where can I find AMETEK Programmable Power’s bidirectional solutions for battery cycling?
AMETEK Programmable Power provides a dedicated Battery Cycler page that routes directly to Mi‑BEAM and i‑BEAM as bidirectional battery cycling options.

