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High-Power Series · 10 kW – 200 kW

High-Power
DC Electronic Loads

Floor-standing programmable DC loads engineered for serious power. The Maynuo M9834–M9840 systems sink from 10 kW up to 200 kW at currents to 1500 A and voltages to 500 V — for EV battery packs, energy-storage systems, fuel cells and power-electronics manufacturing.

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Maynuo high-power DC electronic load floor-standing system

200 kW

Max power per system

1500 A

Max current

500 V

Max voltage

0.03%

Basic accuracy

The high-power line

All high-power models share the same operating modes, precision and protection — they differ in power, current and voltage. Standard models are 150 V; “B” models extend to 500 V. Every system is built to order — contact us for pricing, configuration and lead time.

Industrial cabinets · 10 – 35 kW

Best for: battery-pack lines, large power supplies and production test.

Model	Power	Current	Voltage
M9834	10 kW	0–500 A	0–150 V	Request quote →
M9835	15 kW	0–500 A	0–150 V	Request quote →
M9835B	15 kW	0–240 A	0–500 V	Request quote →
M9836	20 kW	0–500 A	0–150 V	Request quote →
M9836B	20 kW	0–240 A	0–500 V	Request quote →
M9837	35 kW	0–500 A	0–150 V	Request quote →
M9837B	35 kW	0–240 A	0–500 V	Request quote →

Mega systems · 50 – 200 kW

Best for: EV/grid battery systems, BESS containers and inverter test.

Model	Power	Current	Voltage
M9838	50 kW	0–500 A	0–150 V	Request quote →
M9838B	50 kW	0–240 A	0–500 V	Request quote →
M9839	100 kW	0–500 A	0–150 V	Request quote →
M9839B	100 kW	0–240 A	0–500 V	Request quote →
M9840	200 kW	0–1500 A	0–150 V	Request quote →
M9840B	200 kW	0–500 A	0–500 V	Request quote →

Need less than 10 kW? The M97XX & M98XX bench and rack loads cover 150 W – 6 kW. Programmable DC Loads →

Every high-power system is configured to order. Currents, voltages and cabinet layout can be tailored — contact us for a specification.

Built for industrial scale

These are not bench instruments. Each high-power load is a floor-standing rack cabinet (up to ~2 m tall and 4.3 tonnes) engineered to dissipate enormous continuous power safely and accurately. Multiple power modules run in a master–slave architecture, sharing the load evenly while presenting a single instrument to the operator.

Modular master–slave power stages for even current sharing and scalability.
Forced-air, temperature-controlled cooling sized for continuous full-power load.
Same CC/CV/CR/CW precision as the bench range — at hundreds of kilowatts.
Full protection: OVP, OCP, OPP, OTP and reverse-polarity.

At a glance

Power range10 – 200 kW

Currentup to 1500 A

Voltage150 V / 500 V

Dynamic0 – 25 kHz · 5 A/µs

ConstructionFloor-standing rack

ControlGPIB / RS-232 / 485 / USB

Operating modes

Six precise operating modes cover every load scenario — including combined modes that protect the device under test from current strike.

CC — Constant Current

Sinks a set current regardless of the input voltage.

CV — Constant Voltage

Sinks enough current to hold the source at the set voltage.

CR — Constant Resistance

Sinks current proportional to input voltage for a set resistance.

CW — Constant Power

Consumes a constant power as input voltage and current vary.

CC + CV

Current shifting into voltage — protects the source from current strike.

CR + CV

Resistance shifting into voltage — protects the source from current strike.

Dynamic testing

Switch rapidly between two load values to test transient response — in continuous, pulse or trigger operation, up to 25 kHz with a 5 A/µs slew rate.

Continuous

Periodically alternates between value A and value B with set timing.

Pulse

A trigger applies value B for one pulse width, then returns to value A.

Trigger

Each trigger toggles the load between value A and value B.

Applications

EV battery packs

Discharge and cycle high-capacity traction packs and modules.

Energy storage (BESS)

Validate grid-scale storage racks and container systems.

Fuel cells & hydrogen

Characterise fuel-cell stacks and electrolyser power.

PV & inverters

Test solar inverters and DC/DC converters at full power.

Power electronics

Burn-in and qualification of high-power supplies and rectifiers.

Datacenter & telecom

Validate rectifier shelves and DC power systems.

Common specifications

Shared across the high-power range. Power, current and voltage per model are listed in the tables above.

Maynuo M9834 – M9840 — Technical specifications
Operating modes	CC / CV / CR / CW (+ CC+CV, CR+CV)
CC resolution / accuracy	1 mA · 0.1% + 0.05% FS
CV resolution / accuracy	1 mV · 0.03% + 0.02% FS
CR range	0.03 Ω – 10 kΩ (150 V) · 0.3 Ω – 10 kΩ (500 V)
Voltage measurement	0.015% + 0.03% FS
Current measurement	0.1% + 0.05% FS
Dynamic mode	0 – 25 kHz · 5 A/µs
CC soft-startup time	1 – 200 ms
Battery test	0.5–120 V · capacity up to 999 Ah
Interfaces	GPIB · RS-232 · RS-485 · USB
Cooling	Forced-air, temperature-controlled
Construction	Floor-standing rack cabinet
Protection	OVP · OCP · OPP · OTP · reverse polarity
Operating temperature	0–40 °C

PC software & automated testing

Connect over GPIB / RS-232 / RS-485 / USB and drive the load from the free PC software — with live voltage, current and power graphs, full remote control and powerful automated test sequences.

Automatic test

8 data sets × 50 editable steps in any mode.

Battery test

CC discharge to a cut-off voltage for capacity.

Live monitoring

Real-time V / I / P graphs and readback.

Data logging

Export measured results to Excel reports.