DC UPS specialists Maritime, military, infra Innovative, reliable and personal Your local experts


Heynen works for innovators.

Second-life use for batteries

Second-life use for batteries

Battery testing made easy with bidirectional programmable DC power supplies

Testing for Second-Life use
What is the residual capacity of the battery?
The potential uses of second-life batteries from electric vehicles are many and varied. The applications range from home storage, emergency power supplies and power buffers to energy storage for solar power or wind energy.

Bidirectional programmable DC power suppliesbattery_capacity-495x400.png
For this application, it makes sense to use bidirectional laboratory power supplies for further investigation. With only one device, it is possible to test whether older batteries from electrically powered vehicles can still be used in other applications. If these applications are predominantly static and if the residual capacity is sufficient, these batteries will find their second-life use e.g. in stationary energy storage systems.

In this test, the battery is first fully charged with the bidirectional power supply and then discharged in a controlled manner with the same device. The capacity (SOC) and state of aging (SOH) are measured and the energy is fed back into the power grid with an efficiency of over 96%.

Your advantages when using bidirectional programmable DC power supplies from EA Elektro-Automatik

  1. High efficiency and higher safety when testing the battery capacity
    Bidirectional programmable DC power supplies from EA Elektro-Automatik ensure the maximum possible charge and discharge of the batteries. With precise tests, detailed data about the remaining capacity is provided for the DUT.
  2. Amortization through power regeneration
    The bidirectional programmable DC power supply from EA Elektro-Automatik takes its energy from the connected battery during the discharge process and converts it into AC voltage with an efficiency of up to 96%. This is then fed back into the local power grid and reused, thus amortizing the purchase price via reduction of electricity costs.
  3. Economy through time savings
    The time saved in charging and discharging the lithium-ion batteries using the high input powers of up to 15kW in 3U enclosures or 30kW in 4U enclosures increases cost-effectiveness. In addition, the devices can be combined to form high-performance switchgear cabinet systems with a total output of up to 1.92MW.
  4. High flexibility in use
    Versatile and flexible: Due to true autoranging capability of the device series from EA Elektro-Automatik, battery storage systems with different system voltages can be charged and discharged with only one bidirectional programmable DC power supply. For example, full power is available with one device for both a 400V and 800V system.

Bidirectional programmable DC power suppliesschrank_rackeinbau_preview.jpg
As a single unit or scalable cabinet system


  • Bidirectional (Charge & Discharge)
  • TFT color display with touchscreen
  • Plug’n play interface-slot
  • Master-slave function

Technical Specifications

  • 19″ inch case 3U
    with up to 1500V and 15kW
  • 19″ inch case 4U
    with up to 2000V and 30kW
  • Cabinet systems
    with up to 1.92MW


  • Bidirectional (Charge & Discharge)
  • Autoranging for DC In- and Output
  • Integrated Interfaces:
  • Ethernet, USB, Analog
  • Plug’n play interface-slot for:
  • CAN, CANopen, Ethercat, Profibus, Profinet, Modbus, RS232
  • Intuitive operation on full color HMI
  • Battery & fuel cell simulation
  • Integrated function generator
  • Parallel switchable for systems with Master-Slave function
  • EA Power Control user software
  • EA-BS Battery Simulator software
  • Air- and water-cooled variants

Everything under control with the EA Power Control Software
ea_power_control_mockup-845x684.jpgOur efficiency continues with the control of our products. The EA Power Control operating software allows convenient and precise control of EA products via Windows PC. This allows you to remotely control and monitor our DC power supplies and electronic loads from the comfort of your PC. With the optional Multi Control you can manage the settings of up to 20 EA devices simultaneously.

  • Remote control of up to 20 devices simultaneously
  • Process flow control and recording of data
  • Control of the integral function generator
  • Clear layout of all functions
  • Easy firmware updates

  • Share:

Who is Heynen

local specialist

EA Elektro-Automatik

Our expert(s):

Alan van Dongen Alan van Dongen
Please contact Alan with any questions or business opportunities relating to the Powerconversion and UPS units of Heynen. We love to be involved in developing new solutions and bringing these to the Dutch market. Contact form alan.vandongen@heynen.nl
+31 (0)485 55 09 28

Gertjan Eyckmans Gertjan Eyckmans
Please contact Gertjan with any questions or business opportunities relating to Physical Layer, Access & Transport for Fiber, Copper and Coax technologies. We love to be involved in developing new solutions and bringing these to the Belgian and Luxembourg market. Contact form Gertjan.Eyckmans@heynen.be
+32 (0) 11 60 09 09

Heynen is proud to work for


PCIM Europe 2024, Nuremberg

Event date: 11 June 2024 / 13 June 2024
Read more


Heynen is proud to work with