High Voltage Programmable DC Power Supply: 1000 V to 2250 V

Pick the voltage class first

Voltage class is the gating decision. Run your supply at or just above the maximum bus voltage your device under test will ever see, with sensible headroom for transients. Under-specifying caps your test envelope; wildly over-specifying wastes resolution. The N35500 platform from Ultra Power Systems spans the full 0-2250 V range so you can match the class to the application rather than compromise.

Across every class the supply holds 0.02% F.S. accuracy and responds in ≤5 ms, and each is fully programmable with CC/CV/CP/CR modes.

Voltage-class buyer table

Class	Voltage	Per-chassis power	Form factor	Typical applications
1000 V	0-1000 V	up to 42 kW	3U, MW via parallel	EV 400/800 V packs, OBC/BOBC, motor drive
1500 V	0-1500 V	up to 42 kW	3U, MW via parallel	PV strings, ESS/PCS/BESS, utility inverters
2250 V	0-2250 V	up to 42 kW	3U, MW via parallel	HV stacks, aerospace/ATE, research

All three classes share the 3U chassis and the same master/master paralleling, so the path from a single bench unit to a megawatt floor does not change the form factor logic, only the count of chassis.

Safety and compliance at high voltage

High-voltage work raises the stakes on isolation, interlocks and calibration. The platform is built to CE and IEC 61010, regenerates in line with IEEE 1547, and ships with ISO 17025-traceable calibration so your measurements stand up to audit. For PV emulation at high string voltages, the NS91000 option adds EN50530 static/dynamic and Sandia MPPT profiles.

Headroom, resolution and the cost of getting it wrong

It is tempting to buy the highest class "to be safe," but voltage class is a trade-off against resolution. A 2250 V unit set to test a 400 V device works the full range across a fraction of its span, so absolute resolution at your operating point is coarser than a unit matched to that bus. The right move is to choose the smallest class that still clears your maximum bus voltage plus a margin for transients and future devices.

The flip side, under-specifying, is worse: a class that cannot reach your bus voltage simply cannot run the test. Because all three classes share the same 42 kW/3U building block, accuracy figure and feature set, you lose nothing on capability by matching the class tightly, you only gain measurement resolution where it counts.

For high-voltage PV and string work, the platform also runs full array emulation at class voltage, so a 1500 V unit can replay realistic string I-V curves rather than just hold a fixed setpoint.

Specify your high-voltage system

Tell the manufacturer your maximum bus voltage, continuous and peak power, and whether you need PV or battery emulation at that class. The request-a-quote form captures this, or write to Ultra Power Systems. For the energy economics of high-power discharge, see the regenerative supply guide.

Frequently asked questions