Regenerative Grid Simulator – Model 9410

Grid Simulator (4 Quadrant AC source) for Grid-Tied Inverter Testing, Vehicle to Grid (V2G) Testing, AC Power Product Testing, & More!


  • Wide Operating Envelope at 100kW per cabinet
  • Bidirectional DC Source, scalable to 2.4MW/8000A
  • Regenerative, greater than 90% efficiency of discharge power returned to AC mains
  • Built-in digital measurements with charting & scope displays
  • Current, Voltage & Mode transitions in <2 mSec
  • Battery Emulation Mode
  • Touch Panel, LabVIEW® & IVI Drivers
  • Enerchron® Test Executive
Regenerative Grid Simulator Model 9410 - NH Research (NHR)


NHR’s Regenerative Grid Simulator (9410) is a unique four-quadrant bi-directional AC/DC source that simulates the utility voltage and regenerates power sourced by grid-tied inverters. Greater than 90% of power is returned to the facility thereby providing significant energy savings. The 9410 is used as a grid simulator, or emulator for testing PV inverters and other grid-tied products for compliance to IEEE 1547, UL 1741, and global industry standards. A wide-range of AC conditions can be emulated including phase imbalance (in voltage and/or phase angle relationship), voltage sag, frequency changes and harmonic injection.

Modular and Scalable Power

The Regenerative Grid Simulator (9410) is flexible in both output form and power level. Output can be AC or DC and the AC can be single, split or 3-phase. Frequency is programmable between 30 and 100 Hz. Power is scalable from 4 kW to 96kW. With this broad selection of power, phase configuration and frequency, this grid simulator provides the flexibility to test the widest range of grid-tied products. The included measurement system also eliminates the need for additional power meters, DMMs, oscilloscopes, or spectrum analyzers.

3 Channel Multiple Configuration - NH Research (NHR)
Figure 1 - 3 channels with multiple configuration possibilities

Accurate Emulation of Complex Power Disturbances

The Regenerative Grid Simulator (9410) is able to replicate power line disturbances through a combination of user-definable waveforms and Macros. User-defined waveforms permit generation of non-sinusoidal voltages including asymmetrical inflections, transient anomalies, voltage harmonics, or any other irregularity which can be drawn as a single-cycle. The grid simulator can emulate sub-cycle transients, phase jumps and multi-cycle line conditions as required.

Simulating Voltage Harmonics - NH Research (NHR)
Simulating Area EPS Voltage Harmonics
Simulating Sub-cycle Transients - NH Research (NHR)
Simulating Sub-cycle Transients
Simulating Phase Jump - NH Research (NHR)
Simulating Phase Jump
Simulating Abnormal Voltages - NH Research (NHR)
Simulating abnormal voltages (sags, swells & drop outs)

This modular Grid-Simulator is used to verify product AC performance while a 9200/9300 Bi-directional DC Source may be used to emulate any energy storage system.


  • Bi-directional AC – Inverter testing & μgrid simulation
  • More reactive power per kW
  • Simplifies automated test stand development
    – Software selectable 1, 2, or 3 Phase operation
    – Isolated digital inputs & outputs
    – Built-in SW watchdog & safety limits
  • Software tools to shorten test development time
    – PC-based tools & NI certified drivers
    – NI certified LabVIEW & IVI-C/IVI-COM drivers
    – Optional: Enerchron® test sequencer


  • Regenerative, returns greater than 85% of power to the facility, which provides significant electrical savings.
  • Field upgradeable to higher power
  • Fully emulate any utility/grid condition
  • Simulate non-ideal Phase phase angles (A-B & A-C)

Regenerative Grid Simulator Specifications - Model 9410

Model Number 9410-4 9410-8 9410-12 9410-24 9410-36 9410-48 9410-72 9410-96
AC Output Ratings
Phases/Output Channels 1 1 or 2 1,2, or 3
Power, Max (1Φ or 3Φ) 4kW/10.5kVA 8kW/21kVA 12kW/31.5kVA 24kW/33kVA 36kW/94.5kVA 48kW/126kVA 72kW/189kVA 96kW/252kVA
Current Ranges (RMS per Φ) 6, 30 A/Φ 6, 30 A/Φ 6, 30 A/Φ 12, 60 A/Φ 18, 90 A/Φ 24, 120 A/Φ 36, 180 A/Φ 48, 240 A/Φ
Current Ranges (RMS 1Φ) 6, 30A 12, 60A 18, 90A 36, 180A 54, 270A 72, 360A 108, 540A 144, 720A
Peak Current 3 X Max RMS
Frequency 30-100Hz (option up to 880Hz)
Voltage Ranges, L-N 175, 350V (Split Phase 250V Max)
  Accuracy 0.2% Set + 0.2% Rng
  Resolution 0.005% Rng
  Distortion (THD) <1% @ 50/60Hz (Full power into resistive load at 480 VRMS (L-L))
  Response Rate 1V/µS (10% to 90% measured at 90 degree turn-on into resistive load)
  Custom Waveforms Sine, n-Step Sine, Triangle, Clipped-Sine, Arbitrary (user defined)
  Phase Angle Control 0 to 359 degrees/1 degree resolution
DC Output Ratings
Power Max (1ch or 3ch) 4kW 8kW 12kW 24kW 36kW 48kW 72kW 96kW
Current Ranges (Per Ch.) 6, 30A/CH 6, 30A/CH 6, 30A/CH 12, 60A/CH 18, 90A/CH 24, 120A/CH 36, 180A/CH 48, 240A/CH
Current Ranges (Per System) 6, 30A 12, 60A 18, 90A 36, 180A 54, 270A 72, 360A 108, 540A 144, 720A
Voltage Ranges 200, 400 VDC
  Accuracy 0.2% Set + 0.2% Range
  Ripple <800mV RMS
AC & DC Measurements
Peak Voltage (LR, HR) 260, 520V Pk
  Accuracy (AC RMS) 0.1% Rdg + 0.06% Rng
  Accuracy (DC) 0.1% Rdg + 0.1% Rng
  Accuracy (Peak) 0.5% Rdg + 0.2% Rng
  Resolution 0.005% Rng
Current per Phase (LR, HR) 20, 100A Pk 20, 100A Pk 20, 100A Pk 40, 200A Pk 60, 300A Pk 80, 400A Pk 120, 600A Pk 180, 800A Pk
  Accuracy (AC RMS) 0.2% Rdg + 0.06% Rng
  Accuracy (DC) 0.2% Rdg + 0.06% Rng
  Accuracy (Peak) 0.5% Rdg + 0.2% Rng
  Resolution 0.005% Rng
Power Voltage Range x Current Range
  Accuracy (AC RMS) 0.2% Rdg + 0.06% Rng
  Resolution 0.005% Rng
Additional Measurements Energy (Ah, kWh, kVAh), AC Crest Factor, AC Power Factor, Waveform Capture
Enclosure Chassis Chassis Chassis Cabinet Cabinet Cabinet Cabinet (double) Cabinet (double)
Size (HxWxD) 15 3/4 x 19 x 24"/
400 x 483 x 610mm
15 3/4 x 19 x 24"/
400 x 483 x 610mm
15 3/4 x 19 x 24"/
400 x 483 x 610mm
49 x 23 x 30"/
1244 x 584 x 762mm
61 x 23 x 30"/
1549 x 584 x 762mm
78 x 23 x 30"/
1981 x 584 x 762mm
78 x 46 x 30"/
1981 x 1168 x 762mm
78 x 46 x 30"/
1981 x 1168 x 762mm
Weight 145lbs/
* The above specifications show typical configurations. Contact NH Research, Inc. for more information on other model options or custom configurations.



Data Sheet
App Note: Microgrid Test Solutions Across the Distributed Energy Network
App Note: Regenerative Loads & Sources - Removing the Cost of Heat
Guide: Renewable Energy & Micro-grid Test Solutions
Power Lines Field
Utility Grid Power Lines - NH Research (NHR)

Testing Applications


  • Grid Simulation: Microgrid systems
  • V2G, ESS
  • On-board Chargers, Grid-aware Chargers
  • Grid Utility Test
  • PV/Grid Tied Inverter Test
  • UPS, Power Distribution Unit (PDU) Test
Compliant with UL1741, IEEE1547 and similar grid-tied standards world-wide.

Related Products

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