Maynuo M9711 Programmable DC Electronic Load – 150 W / 30 A / 150 V

Maynuo M9711 Programmable DC Electronic Load – 150 W, High Accuracy & Fast Dynamic Response

The Maynuo M9711 is a compact, high-precision programmable DC electronic load designed for demanding test and measurement applications involving DC power supplies, batteries, adapters, chargers, DC/DC converters, and LED drivers. As part of the proven Maynuo M97 series, it combines fast response, accurate measurement, and versatile operating modes in a reliable bench-top and rack-mountable instrument.

The M9711 supports Constant Current (CC), Constant Voltage (CV), Constant Resistance (CR), and Constant Power (CW) modes, allowing precise simulation of real-world load conditions. For dynamic and transient testing, it offers a fast dynamic response up to 25 kHz with a high current slew rate of 2.5 A/µs, making it ideal for evaluating power supply stability, transient behavior, and control loop performance.

With a maximum power dissipation of 150 W, input voltage range up to 150 V, and current capability up to 30 A, the Maynuo M9711 provides excellent flexibility for low- to mid-power DC test scenarios. High measurement resolution and accuracy (up to 0.03%) ensure reliable and repeatable results in both development and production environments.

The electronic load includes advanced features such as battery discharge testing, short-circuit simulation, soft-start functions in CC and CV modes, and programmable list and automatic test sequences. Comprehensive protection mechanisms—including over-voltage, over-current, over-power, over-temperature, and reverse-polarity protection—safeguard both the device under test and the electronic load during normal operation and fault conditions.

Battery Life Stability Test

The Maynuo M9711 features an integrated Battery Life Stability Test function, allowing accurate and repeatable evaluation of battery performance, capacity, and discharge behavior under controlled conditions. This function is ideal for testing lithium-ion, lead-acid, NiMH, and other rechargeable battery types, as well as battery packs used in power electronics and embedded systems.

In Constant Current (CC) mode, the electronic load discharges the battery at a user-defined current, simulating real operating conditions. The test continues until the battery voltage reaches a programmable end-of-discharge voltage, at which point the M9711 automatically stops the test to prevent over-discharge and protect the battery.

During the test, the M9711 continuously measures and displays battery voltage, discharge current, consumed power, elapsed time, and calculated battery capacity, enabling precise assessment of battery stability and remaining usable energy. The system supports long-duration tests ranging from seconds up to several hours, making it suitable for both quick functional checks and full capacity characterization.

When connected to a PC via RS-232, RS-485, or USB (Modbus), the Battery Life Stability Test can be logged and analyzed remotely, allowing users to generate discharge curves and capacity reports for validation, quality control, and documentation purposes.

This feature makes the Maynuo M9711 an excellent tool for battery development, incoming inspection, production testing, maintenance diagnostics, and reliability evaluation, ensuring consistent and repeatable battery performance assessment in both laboratory and industrial environments.

Remote Control & Automation Ready

The Maynuo M9711 supports RS-232, RS-485, and USB communication (optional interfaces), using Modbus protocol for easy integration into automated test systems, production test rigs, and lab software environments .

Key Features & Benefits

Multiple Operating Modes
Supports Constant Current (CC), Constant Voltage (CV), Constant Resistance (CR), and Constant Power (CW) modes for flexible testing of virtually any DC source .
150 W / 30 A / 150 V Input Capability
Suitable for testing switch-mode power supplies, linear supplies, DC adapters, LED drivers, and battery systems.
High Accuracy & Resolution
- Current resolution down to 0.01 mA
- Voltage resolution down to 1 mV
- Basic measurement accuracy up to 0.03%
  Ensures precise and repeatable test results in demanding applications .
Fast Dynamic Load Testing
Dynamic modes up to 25 kHz with a current slew rate of 2.5 A/µs, ideal for transient response testing of power supplies and DC/DC converters.
Battery Test & Short-Circuit Functions
Integrated battery discharge testing and controlled short-circuit simulation simplify qualification and reliability testing.
- Bright VFD Display with clear real-time readout of voltage, current, and power
- Rotary encoder and keypad for fast local operation
- Intelligent temperature-controlled fan for low noise and long service life
- Compact 19-inch rack-mountable form factor (108 × 214 × 365 mm)
  
  Advanced Protection Functions
  Built-in over-voltage, over-current, over-power, over-temperature, and reverse polarity protection ensure safe operation for both the device under test and the load itself.

User-Friendly Design

Bright VFD Display with clear real-time readout of voltage, current, and power
Rotary encoder and keypad for fast local operation
Intelligent temperature-controlled fan for low noise and long service life
Compact 19-inch rack-mountable form factor (108 × 214 × 365 mm)

Typical Applications

Power supply design and validation
Battery capacity and discharge testing
LED driver testing
Production line quality control
Education and research laboratories
Service and repair diagnostics

Solar Cell & Photovoltaic Testing

The Maynuo M9711 DC electronic load is well suited for solar cell and photovoltaic (PV) source testing, enabling controlled and repeatable evaluation of solar panels, PV modules, and DC outputs of solar charge controllers and converters. Using its Constant Current (CC), Constant Voltage (CV), and Constant Resistance (CR) modes, the M9711 can accurately simulate real operating conditions encountered in photovoltaic systems.

By sweeping load current or resistance, users can characterize the I-V curve and power output behavior of solar cells and panels under different conditions. The high measurement resolution and accuracy allow precise monitoring of voltage, current, and power, making it possible to evaluate maximum power point (MPP) behavior, conversion efficiency, and system stability.

The fast dynamic response of the M9711 enables testing of MPPT controllers, observing how the system reacts to rapid load changes and transient conditions. In addition, programmable test sequences and remote control via Modbus (RS-232 / RS-485 / USB) allow automated PV testing, data logging, and repeatable measurement procedures.

These capabilities make the Maynuo M9711 a practical and cost-effective solution for solar cell development, PV system validation, charge controller testing, and educational photovoltaic experiments in laboratory and production environments.

Why Choose the Maynuo M9711?

The Maynuo M9711 DC electronic load delivers professional-grade performance at an excellent price-to-performance ratio. Its combination of precision, speed, safety, and flexibility makes it a trusted choice for engineers and test professionals who need reliable DC load testing without unnecessary complexity.