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15kW Bi-directional DC Power Supplies







More Delta Power


With the new SM500-CP-90 we have extended our offering to a higher power level: from 6kW

maximum per supply to 15kW.

Increased power without compromising either specifications or lifespan is what the

SM500-CP-90 offers. A breakthrough in power electronics technology has enabled us to

engineer features that customers demanded but were previously impossible while maintaining

very competitive prices.

Several new features are introduced in the SM500-CP-90 compared to our current power

supply series. One is already implied in the unit name: CP is short for Constant Power! The

constant power characteristic is not new, but along with a bi-directional power flow it is! Here

are the most striking features.


Flex output for better valueIcon_Flex Output: Constant Power


The constant output power covers the output range of five separate power supplies with a

traditional rectangular VI-curve. Choosing the best output range is much easier now and offers

users far better value for money.


Bi-directional power flow

 Icon_Bi-directional Power Flow

Bi-directional power means the same constant power characteristic in the second quadrant for

the full 15kW. It operates like an electronic load too: previously Delta’s power supplies would

be equipped with an optional power sink capable of absorbing up to 10% of the total energy

which was dissipated via internal heat sinks. Now, the power sink is standard and can sink up

to 100% of the power without the need for dissipating lots of energy.


Power Recovery [Regeneration] Technology


With new Power Recovery [Regeneration] Technology Delta returns full power back into the

grid and the efficiency of 95% avoids the need for expensive water cooling. Compared to

traditional electronic loads – where dissipation is 100% – there is a power loss of just 5%.

Rooms will be cooler, costs for air conditioning systems will drop significantly and overall, the

SM500-CP-90 contributes to a smaller carbon footprint.


Extremely good dynamic response to load changes


Fast response to load changes has been a challenge for a long time, especially when it comes

to changing from positive to negative current and vice versa. Previously, for applications

requiring source and sink devices, several solutions were offered such as pre-loads. The full

integration of source and sink in one device is a neater and more efficient solution. The output

voltage of a SM500-CP-90 recovers in 200µs after a load change from +90 to -90A and -90 to



Inclusive functionality


Besides the constant power output and the bi-directional power flow a lot of other features are

included in the standard versions of the SM15K-series. For instance:

- Ethernet interface

- Built-in sequencer

- Digital control to adapt regulation to match load type
- Fine tune settings

There are no additional charges for these features.

Unit Voltage range Current range

0 - 500 V

-90 .. 90A


    • Bi-directional power supply with standard 15 kW source and sink
    • Flexible output with constant power characteristics
    • Power Regeneration Technology: in sink mode the PSU returns the energy back into the grid
    • Very low heat dissipation. Efficiency is more than 95%. No need for expensive cooling systems.
    • Excellent dynamic responses to load changes including all-digital control to adapt regulation to match load type
    • Designed for long life at full power
    • Protected against all overload and short circuit conditions


    • Operation on wide range of 3 phase AC input voltages
    • Ethernet interface, built-in sequencer and web interface are included
    • Large user display, menu driven operations
    • Durable digital encoders for voltage and current adjustment and menu operation
    • EMC surpasses CE requirements: low emission and high immunity
    • Low audible noise: temperature controlled cooling fans




Dimensions and weight:

Width = 19"

Height = 3 U

Depth = 591 mm

Weight = 27 kg

Downloads Document format Size
Data sheet SM15K-series PDF (Acrobat Reader) 675.3 KB
Data sheet Interfaces SM15K PDF (Acrobat Reader) 300.3 KB
Manual Ethernet & Sequencer Programming SM15K PDF (Acrobat Reader) 686.4 KB
Sales Department

T: +31 111 413656
F: +31 111 416919

E: by filling out the contact form


Contact form
Product Support

T: +31 111 413656
F: +31 111 416919 

E: by filling out the contact form


Contact form