Solar module diagnosis system

We optimize the PV power generation efficiency by analyzing accurate and objective data on the causes that lower
the efficiency of the module (hot spot, micro crack, bypass diode et al) through specialized equipment. It is difficult to identify the hot spot,
micro crack et al which lower the efficiency of the module with the naked eye.

We collect and analyze accurate and objective data using specialized equipment.

How it works

The diagnosis is conducted with the reverse current method using the luminescence effect which is a feature of the PV cell’s light-emitting diode.

• Initial specification

• Ambient conditions

< Inspecting the function of the bypass diode of the module having poor access to the string which can
trace the hot spot of the module without lighting (possible at night time)>

1. Diagnosis of faulty bypass diode of the two-modules

2. Diagnosis of a micro crack

3. Diagnosis of cell damage

4. Diagnosis of screen printing damage

PV module cleaner machine

This is a robot system which can clean and diagnose the 1MW-level power plant (panel area: 6,000m2) within 8 hours,
and a set of this system is composed of the main robot and 4 cleaning robots.
It is a practical and highly economical robot which a private person or a maintenance company can use easily by dividing supply and labor

Platform and performance of PV module cleaner machine

• [Lightweight platform] Used as the power source for brush rotation and robot movement
  with the high-pressure water supplied from the main robot or water line

• - Minimizing damage of the panel as battery consumption has been minimized and the robot platform has become lighter
  by removal through a high-pressure water pump and a brush driving motor
  - Ensuring ease on user’s operation through lightweight cleaning/diagnosing robot

• [Module-typed platform] Cleaning module and diagnostic test module of 2-meter basic unit can respond
  to various panel sizes through structuring

• - Capable of responding to a PV panel exceeding 4 meters
  by additionally composing the vertical guide rail-type movement mechanism
  - Maximizing the usability of a single cleaning robot by modularizing the diagnostic test module as a detachable structure
  - Enhancing the cost-effectiveness of the robot by modularizing each function of the parts and utilizing common-used parts (battery pack et al)

• [Movement performance] Using the long-panel movement mechanism
  with a maximum angle of 45° and the length of 50m or longer

• - The Movement mechanism structure capable of recovering irregular panel arrays
  such as a gap and drop between panels and driving even at a panel angle of 45°
  - Capable of long panel movement of 50 meters or more with the hose reeling system of the robot itself

• [Advanced diagnosis and failure prediction system] Mounted with a reliable diagnosis and inspection technology using GPS,
  and visual and auditing sensors

• - Function of self localization using GPS sensor and encoder sensor
  - Precise diagnosis using a high-resolution imaging sensor and a high-sensitivity auditory sensor
  - Detailed detection of cleaning status and fault area through precise analysis of the AI (artificial intelligence) algorithm-based large data
  - Application of technology for history management and failure prediction of a diagnosed part through the time series analysis
  with the diagnosis data acquired in the past

Quick cleaning speed

- Capable of cleaning the panel array of 50 meters or longer at a speed of 720m2 per hour with the platform structure
of moving while cleaning the whole PV panel arrays at once
- Capable of operating continually without needing a separate stand-by time for water supplying or battery charging

High-quality cleaning ability

- Excellent performance in cleaning yellow dust, fine dust, bird’s droppings et al
with high-pressure water spray and control of contact force of the rotary brush

Flexible system response ability

- Capable of applying the robot platform to various panel widths such as 2, 4, 6, or 8 meters - Capable of system operation in a small-scale power plant or large-scale power generation complex of tens of MWs either
by operating just one unit of the cleaning/diagnosis robot
or simultaneously operating multiple sets of the robot group consisting with one main robot and up to 4 cleaning/diagnosis robots

Stability of system operation

- The system is supported by a roller attached to the platform at the upper and lower ends of the panel array and moves while working.
The risk of a panel surface damage or platform fall is removed as the system is not influenced by the panel installation angle or the weather such as rain, wind et al.

Differentiated diagnostic test performance

-Contaminants not removed, cell damage at the upper part of the panel, pattern break, micro crack, hot spot, cable break, and short circuit of a connector et al

*We precisely inspect and detect cell damage on the PV panel, micro crack, pattern break in the panel, micro hot spot et al through
the image processing of video images of up to 1mm resolution and thermal image of up to 2.5mm resolution, and we also precisely receive the sound wave
for a cable break through a microphone voice data analysis, thereby accurately diagnosing a cable or a connector break of more than 2-meter distance