What it is

The EA-PUL 10000 is a three-phase programmable electronic DC load with energy recovery. Instead of dissipating absorbed power as heat, it feeds the consumed DC energy back into the grid at up to over 96% efficiency. Autoranging input stages sink full power (30 kW in the 4U chassis, 60 kW in the 6U) across a wide voltage and current range, and up to 64 units parallel into systems reaching 3840 kW and 64000 A.

• Regenerative load — recovers absorbed DC energy to the local or public grid at up to over 96% efficiency
• Power per unit: 30 kW (PUL 10000 4U) or 60 kW (PUL 10000 6U)
• Input classes: 0–80 V / 0–1000 A up to 0–2000 V / 0–40 A (4U); 0–360 V / 0–480 A up to 0–2000 V / 0–80 A (6U)
• Autoranging constant-power input — full rated power across a wide V/I envelope, not only at a single operating point
• Regulation modes: CV, CC, CP, CR with fast crossover; digital control with 16-bit ADCs and DACs; selectable control speed (Normal, Fast, Slow)
• Wide-range 3-phase input: 380–480 V ±10% (4U also accepts 208–240 V ±10%, derated to 18 kW)
• Parallel operation to 64 units via Master-Slave bus and galvanically isolated Share-Bus
• Built-in USB, Ethernet, and analog interfaces; SCPI and ModBus command sets with LabVIEW and IVI drivers

Energy recovery instead of heat

A conventional electronic load turns the energy it absorbs into heat, which then has to be removed by air conditioning. The PUL 10000 is regenerative: the energy consumed in load mode is converted back to AC and fed into the connected grid at up to over 96% efficiency. A device under test draws energy from the mains, converts it to DC, and feeds that into the PUL 10000, which returns it to the grid.

Two costs fall as a result. Energy cost drops because the absorbed power is recovered rather than wasted, and cooling cost drops because the unit generates far less heat than a dissipative load. Less cost-intensive air conditioning is required, and in many cases a single device is sufficient for the application, reducing investment and installation cost.

The principle of autoranging

A conventional load reaches full power at only one voltage-current point. The PUL 10000 uses a flexible, power-regulated input stage (autoranging) that maintains full rated power across a wide range of voltage and current combinations. One unit covers a working area that would otherwise require several fixed-rating loads.

The result is a constant-power characteristic: as terminal voltage falls, the current the load can draw rises to hold the same wattage. A single 30 kW 4U unit, for example, sinks its full power from a high-voltage/low-current operating point down through a low-voltage/high-current point along one continuous curve. For battery and discharge work this reaches down to very low voltages, with the high load current allowing maximum total discharge even below 2 V.

What it tests and processes

Battery test for electro mobility. Tests the electrical characteristics of batteries across cell, module, and pack level, including State-of-Health (SOH) determination for second-life classification and end-of-line (EOL) test. Suits both standalone automatic test systems and integrated battery test, with the measurement accuracy, reproducibility, and efficiency the application demands.

Fuel cell test. Tests the resistance, performance, and active life of fuel cells, stacks, and complete systems in all electrical modes with accurate, reproducible results. Where higher current is needed for a full fuel-cell system, multiple units connect in parallel in a Master-Slave system while accuracy and performance are maintained.

On-board charger (OBC) test. Verifies charger behavior under varying conditions with the sequencing and logging functions of EA-Power Control for exportable, reproducible test data. The load's adjustable regulation speed (Normal, Fast, Slow) is matched to the charger's control loop to avoid competition between the two control loops during test.

Battery recycling. Assesses retired EV batteries for second-life use, starting from a one-click SOH check. Where too little capacity remains, autoranging allows full discharge before recycling, down to voltages under 2 V via the high load current, while mains feedback at up to over 96% efficiency keeps the process cost-effective.

Why engineers pick it

Recovers energy instead of wasting it. Absorbed DC power is returned to the grid at up to over 96% efficiency, cutting both energy cost and the heat load that would otherwise drive air-conditioning cost.

One unit covers a wide operating envelope. Autoranging input stages hold full 30 kW or 60 kW across a broad voltage and current range, so a single load replaces several fixed-rating units and reaches down below 2 V for deep-discharge work.

Precise digital regulation matched to the DUT. 16-bit ADCs and DACs, CV/CC/CP/CR modes with fast crossover, and selectable control speed (Normal, Fast, Slow) deliver load regulation to ≤0.05% FS in CV and let the load be tuned to a charger or source control loop.

Scales to megawatt systems as one unit. Up to 64 units combine over Master-Slave and Share-Bus into a single addressable system, up to 1920 kW with 30 kW 4U units and up to 3840 kW and 64000 A with 60 kW 6U units.

Scaling to high-power systems

For higher power and current, units connect in parallel through the rear copper rails; a contact-protection cover is provided. The Master-Slave bus lets the combined system behave as one device, with total power and total current reported on the master and slave-unit warnings and alarms appearing in its display, while the Share-Bus distributes load equally across the connected units.

A 19 in cabinet with 42U provides a 300 kW system in roughly 0.6 m² (6.5 sq ft) of floor space. The Master-Slave bus supports up to 13 cabinets and a maximum of 64 units. Power classes can be mixed from 5 kW upward provided the voltage class stays constant, so a 150 kW system can be built from two 60 kW 6U units and one 30 kW 4U unit.

Choosing your configuration

Select the chassis by power, then the input class by voltage and current:

• PUL 10000 4U — 30 kW. Nine input classes from 0–80 V / 0–1000 A up to 0–2000 V / 0–40 A. Enclosure 19 in × 4U × 668 mm (26.3 in), 50 kg (110 lb). Accepts 380–480 V or 208–240 V (derated to 18 kW).
• PUL 10000 6U — 60 kW. Seven input classes from 0–360 V / 0–480 A up to 0–2000 V / 0–80 A. Enclosure 19 in × 6U × 668 mm (26.3 in), 76 kg (168 lb). Accepts 380–480 V.

Then choose options:

• Water cooling in stainless steel, adding weight to 56 kg (126 lb) on the 4U or 82 kg (180 lb) on the 6U.
• Function generator for load-profile and simulation work.
• Interface card — CAN, CANopen, RS232, Profibus, EtherCAT, or single/dual-port Profinet, Modbus, or Ethernet, in addition to the built-in USB, Ethernet, and analog interfaces.

Configure your PUL 10000 on this page — chassis, input class, cooling, and interface — then add to cart or request a quote. For multi-unit parallel systems, cabinet integration, and Share-Bus builds, contact W5 Engineering.

Buy the EA-PUL 10000 through W5 Engineering

W5 Engineering is your authorized North American distributor for EA Elektro-Automatik. Configure and order the PUL 10000 directly on this page, with W5 support for input-class selection, parallel-system design, interface and cooling options, integration, and availability.