400W 800W Solar Panel Power Supply Multimeter MPPT Tester

Meet the 400W 800W Solar Panel Power Supply Multimeter MPPT Tester, a compact, solar-powered testing companion designed to verify PV panel performance with ease. It measures open-circuit voltage in real time and automatically tracks the maximum power point (MPPT) to optimize panel output without drawing energy from your network. This makes it ideal for PV panel manufacturers, distributors, installers, and enthusiasts who want quick, accurate power diagnostics on the go.

Choose between two models to match your needs: EL400B (0.1–400 W, 0–20 A) and EY800W (5–800 W, 0–35 A), both operating from 12–60 V. The device uses solar panels as its power source, offering an energy-saving approach that keeps testing independent of external electricity. Features include Auto MPPT Detection for automatic interval adjustments, Manual MPPT Detection for targeted MPPT scans, a large backlit LCD for clear readings, and built-in protections (over-voltage, over-temperature, over-current, and over-rated power) for safe operation in diverse environments. With a lightweight, portable 165 × 80 × 30 mm form factor and a CE-certified design, it’s ready for field use and shop floor testing alike.

Benefits & Tips

• Auto MPPT Detection: Press the AUTO MPPT test button and the instrument automatically adjusts test intervals according to current power, refreshing the display (for example, a 100 W panel may refresh every 5 seconds).
• Manual MPPT Detection: Use the manual MPPT test button to scan for the maximum power point and instantly refresh the display for precise tuning.
• Real-time Open-Circuit Voltage: The open-circuit voltage is shown on the large LCD at any time, helping you monitor panel health during setup and testing.

Product specifications

• Model: EL400B / EY800W (optional)
• Voltage range: 12–60 V
• Power range: EL400B 0.1–400 W; EY800W 5–800 W
• Current range: EL400B 0–20 A; EY800W 0–35 A
• Power supply mode: Solar panel power supply
• Display: Large digital LCD with backlight
• Display type: Digital display
• Operating temperature: 0–40 °C
• Origin: Mainland China
• Certifications: CE
• Dimensions: 165 × 80 × 30 mm
• Weight: 470 g
• Battery included: No

Package includes:

• 1 × Solar Panel Multimeter
• 1 × Connecting Cable
• 1 × Alligator Clip Cable
• 1 × EVA Toolkit
• 1 × User Manual

Warnings/Reminders

• Operate within the specified voltage (12–60 V) and power ranges for the selected model (EL400B or EY800W).
• Keep the device away from moisture and extreme temperatures beyond 0–40 °C.
• Ensure correct polarity when connecting cables to avoid incorrect readings or damage.
• This tester uses a solar panel as its power source; do not connect to external AC power sources.

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