1. Introduction
The TOOLTOP ET271 is an advanced Solar MPPT Power Tester designed for efficient and accurate measurement of photovoltaic modules. It provides essential data such as Maximum Power (Pmax), Open Circuit Voltage (Voc), and Short-Circuit Current (Isc), making it an indispensable tool for solar panel installation, maintenance, and performance evaluation. With its high-power testing capability up to 2000W and comprehensive protection features, the ET271 ensures reliable and safe operation.
2. Safety Information
Please read and understand all safety warnings and operating instructions before using the ET271 tester. Failure to do so may result in injury or damage to the device.
- Over Voltage Protection: The tester has a test range of 3-90V. If the input voltage exceeds 90V, the display will show "overvoltage". Disconnect immediately.
- Over Current Protection: The tester has a test range of 0-40A. If the input current exceeds 40A, the display will show "overcurrent". Disconnect immediately.
- Over Temperature Protection: If the internal temperature exceeds 260°C, the display will show "over temperature". Allow the device to cool down before further use.
- Reverse Polarity Protection: The instrument is designed with reverse polarity protection. If the positive and negative poles are reversed during connection, the instrument will not display any readings, preventing damage. Correct the connection before proceeding.
- Over Power Protection: If the input power exceeds the rated range (2000W), disconnect the device. Use within the specified power limits.
- Ensure all connections are secure before initiating any tests.
- Do not attempt to disassemble or modify the device.
- Keep the device away from water, moisture, and extreme temperatures.
3. Package Contents
Please check the package contents upon receipt to ensure all items are present and undamaged:
- 1 x TOOLTOP ET271 Solar MPPT Tester
- 1 x Solar Test Clip (Kelvin clamps)
- 1 x USB Cable (Type-C Charging Cable)
- 1 x Storage Bag
- 1 x English User Manual
4. Product Overview
4.1. Device Layout
4.2. Display Interface
The ET271 features a 3.2-inch TN LCD screen that clearly displays all measurement parameters simultaneously.
- Pmax: Maximum Power
- Vmppt: Max Power Point Voltage
- Imppt: Max Power Point Current
- Vopen: Open Circuit Voltage
- Ishort: Short-Circuit Current
4.3. Key Features
- Maximum Power Point Tracking (MPPT)
- Test Record Function
- Over Temperature Protection
- Over Voltage Protection
- Reverse Polarity Protection
- Over Current Protection
- Over Power Protection
- Built-in Flashlight
- 3.2-inch LCD TN Screen
- Type-C Charging
- Built-in Lithium Cell (1250mAh)
- Auto Power Off Function
5. Specifications
| Parameter | Value |
|---|---|
| Model | ET271 |
| Display | 3.2 inches LCD TN (55*57mm) |
| Solar Voltage | 3~90.00V / ±1.5%+5 |
| Solar Current | 0~40.00A / ±1.5%+5 |
| Solar MPPT Power | 0~2000W / ±1%+5 |
| Sampling Point | 200 digit group |
| Data Record | 30 sets |
| Interface | DB9 |
| Protection Features | Over Voltage, Over Current, Reverse Polarity, Over Temperature, Low Battery Detection, Auto Power Off |
| Working Environment Temperature | 0~40°C |
| Working Environment Humidity | 0~30°C: ≤75%, 30~40°C: ≤50% |
| Storage Environment Temperature | -10~50°C |
| Storage Environment Humidity | ≤50% |
| Battery | Built-in 1250mA.H rechargeable lithium battery |
| Power Input | 5V/2A/10W or higher (charger not included) |
| Dimensions | 140mm (H) x 80mm (W) x 30mm (T) |
6. Setup
6.1. Charging the Device
The ET271 comes with a built-in 1250mAh rechargeable lithium battery. Before first use, or when the low battery indicator appears, charge the device using the provided USB Type-C cable and a 5V/2A/10W or higher USB charger (charger not included).
- Connect the USB Type-C cable to the charging port on the ET271.
- Connect the other end of the USB cable to a suitable USB power adapter.
- The charging indicator on the device will show the charging status.
6.2. Connecting Test Clips
The ET271 uses Kelvin clamps for rapid and secure connections to solar panels or modules.
- Ensure the ET271 is powered off before making connections.
- Connect the red Kelvin clamp to the positive (+) terminal of the solar panel/module.
- Connect the black Kelvin clamp to the negative (-) terminal of the solar panel/module.
- Ensure connections are firm and secure to prevent inaccurate readings or disconnections during testing.
7. Operating Instructions
7.1. Powering On/Off
- Press and hold the 'MODE' button to power on the device.
- The device supports an auto power-off function to conserve battery.
7.2. MPPT Test Modes
The ET271 supports both automatic and manual MPPT testing modes.
7.2.1. Automatic MPPT Test
- Ensure the solar panel/module is connected correctly.
- Press the 'TEST' button to initiate an automatic MPPT test.
- The device will automatically scan and determine the maximum power point, displaying Pmax, Vmppt, Imppt, Vopen, and Ishort.
- The test data is automatically recorded after completion.
7.2.2. Manual MPPT Test
- Ensure the solar panel/module is connected correctly.
- Press the 'MODE' button to switch to manual test mode (if available, or follow specific manual mode instructions in the device's on-screen menu).
- Follow the on-screen prompts to perform a manual scan or adjust parameters.
- The device will display the measured values.
7.3. Data Recording and Recall
The ET271 can store up to 30 sets of test data. MPPT test data is automatically recorded after completion and can be viewed even after restarting the device.
- After a test is completed, the data is automatically saved.
- Press the 'RECALL' button to access the stored test records.
- Use the navigation buttons (if present, or 'MODE' button for cycling) to browse through the saved data sets.
7.4. Using the Flashlight
The ET271 includes a built-in flashlight for convenience in low-light environments.
- Locate the flashlight button (refer to the Product Overview diagram).
- Press the button to turn the flashlight on/off.
8. Maintenance
8.1. Cleaning
- Wipe the device with a soft, dry cloth.
- Do not use abrasive cleaners or solvents.
8.2. Storage
- Store the ET271 in the provided storage bag when not in use to protect it from dust and physical damage.
- Store in a cool, dry place with temperatures between -10°C and 50°C and humidity below 50%.
- Avoid prolonged exposure to direct sunlight or extreme temperatures.
8.3. Battery Care
- Recharge the battery regularly, even if the device is not in frequent use, to maintain battery health.
- Avoid completely draining the battery for extended periods.
9. Troubleshooting
If you encounter issues with your ET271, refer to the following common problems and solutions:
- Device does not power on: Ensure the battery is charged. Connect the device to a charger and try again.
- No display/readings: Check if the test clips are connected correctly (red to positive, black to negative). The device has reverse polarity protection and will not display if connections are incorrect.
- "Overvoltage" displayed: The input voltage from the solar panel exceeds 90V. Disconnect immediately and ensure the panel's Voc is within the tester's specified range (3-90V).
- "Overcurrent" displayed: The input current exceeds 40A. Disconnect immediately and ensure the panel's Isc is within the tester's specified range (0-40A).
- "Over temperature" displayed: The device's internal temperature is too high. Power off the device and allow it to cool down in a well-ventilated area before resuming use.
- Inaccurate readings: Ensure test clips are making good contact with the terminals. Clean the terminals if necessary. Verify the solar panel is receiving adequate sunlight for testing.
10. Warranty and Support
For warranty information and technical support, please refer to the documentation provided at the time of purchase or contact your retailer. Keep your purchase receipt as proof of purchase.
