What it is

The EA-PSB 20000 Triple is a three-channel programmable bidirectional DC power supply — three independent, fully isolated source-and-sink channels in one rack unit, each regenerative back to the grid at over 96% efficiency and autoranging across its full voltage and current range. It runs synchronized tests on separate components or subsystems at once, and comes in a 3U build at 3 × 5 kW and a 4U build at 3 × 10 kW, spanning 0–60 V to 0–920 V and 0–20 A to 0–340 A per channel.

• Three independent, fully isolated bidirectional channels (source and sink) with autoranging
• 3 × 5 kW (3U) or 3 × 10 kW (4U) — up to 10 kW per channel
• Per-channel DC 0–60 V up to 0–920 V; 0–20 A up to 0–340 A
• Regenerative energy recovery to the grid, efficiency over 96%
• Worldwide 3-phase input, 208–480 V ±10%, with active power factor correction (typical 0.99)
• Built-in high-speed control interfaces at 1 ms communication speed
• USB, Ethernet 1 Gbit/s, EtherCAT, CAN FD, Master-Aux-Bus, Share-Bus, front-panel USB host, and Digital In/Out
• Galvanically isolated Share-Bus for parallel operation
• More than 50% rack-space saving versus three single-output devices
• EA Power Control and EA Battery Simulator software

What it is used for

Some of the use cases for the PSB 20000 Triple include:

• PV inverter test — three channels cover two panel inputs and a battery output in a single device, and the built-in software recognizes MPP (maximum power point) tracking to determine the efficiency of the PV inverter
• Automotive and EV testing — higher-voltage components and advanced energy systems across all electrical subsystems, with triple-channel bidirectional output for testing modern EV components
• Parallel component and subsystem test — motors, inverters, and on-board chargers tested together in the same setup, reducing the time to validate each component individually
• Battery test and simulation — bidirectional charge/discharge with EA Battery Simulator software

Source, sink, and control

Three independent bidirectional channels. Each of the three channels is a fully isolated, bidirectional source-and-sink stage with autoranging, so one device sources and sinks on three separate components at once — independently or synchronized — instead of a separate supply and load per channel. The autoranging stages hold power across a wide voltage and current range, so each channel covers many voltage-and-current combinations.

Regenerative energy recovery. In bidirectional (load) mode the channels return absorbed energy to the grid at over 96% efficiency rather than dissipating it as heat, so operational expense falls on two fronts — the recovered energy and the reduced HVAC load. Combined with three channels in one chassis, rack space drops by more than 50% versus three single-output devices.

High-speed control. Built-in high-speed control interfaces run at 1 ms communication speed over USB, Ethernet (1 Gbit/s), EtherCAT, and CAN FD, with a front-panel USB host and a Digital In/Out connector. The galvanically isolated Master-Aux-Bus and Share-Bus tie multiple units together for parallel operation, and the units are supported by EA Power Control and EA Battery Simulator software.

Why engineers pick it

Three channels in one device. Three independent, isolated bidirectional channels run parallel tests on different components or subsystems — motors, inverters, on-board chargers — in the same setup, so each component is validated faster instead of one at a time.

Half the rack space. Consolidating three outputs into one chassis reduces rack occupation by more than 50% versus three single-output devices, raising test density per rack.

Regeneration lowers running cost. Bidirectional operation returns over 96% of absorbed energy to the grid instead of converting it to heat, cutting both energy and air-conditioning cost.

Built for speed. Built-in high-speed interfaces at 1 ms communication, with Ethernet 1 Gbit/s, EtherCAT, and CAN FD, suit synchronized, automated testing in fast-moving automotive and renewable-energy programs.

Configuring and scaling

The series resolves along build, model, and options.

• Build sets form factor and power per channel — a 3U build at 3 × 5 kW and a 4U build at 3 × 10 kW.
• Model sets the per-channel voltage-and-current envelope, from 0–60 V / 0–170 A through 0–920 V / 0–20 A in the 3U build, and 0–60 V / 0–340 A through 0–920 V / 0–40 A in the 4U build.
• Options cover water cooling in stainless steel (4U) and a US 208 V variant (3U).

The device operates independently or as part of a complete test system, including the rack in which it is housed, and the galvanically isolated Share-Bus and Master-Aux-Bus tie multiple units together for parallel operation.

Configure your PSB 20000 Triple on this page and buy it directly. For the water-cooling build, the US 208 V variant, paralleled multi-unit systems, or a full turnkey rack, contact W5 Engineering and we will scope it with you.