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Case Study: "Outdoor Exposure Measurement System with Remote Monitoring Function for Solar Cells" PDF

In a self-consumption solar power generation system with multiple strings, during the day, one I-V curve tracer will switch between the target modules to measure the I-V curve, and at night, one PV remote monitoring device will evaluate the bypass diode, blocking diode, and insulation resistance.

• Other electronic measuring instruments

Automatically detects the occurrence of "solar cell malfunctions" and "DC ground fault incidents" that lead to fire accidents in solar power generation systems, serving as a safety net!

In solar power generation systems, there is a risk of fire accidents caused by factors such as leakage current and failures of bypass diodes in solar cells. To detect these issues, manual inspection work using devices like megohmmeters and bypass diode testing equipment is necessary. However, this device automatically performs these inspection tasks. It captures changes in conditions that are difficult to detect through monitoring measurement values via power conditioners, significantly contributing to the safe operation of solar power generation systems and the maintenance of power generation capacity. Furthermore, it is an unprecedented remote monitoring device capable of detecting cable theft (disconnection) on the DC side. ◆ Measurement of insulation resistance of solar cell strings (DC ground fault detection and ground fault location identification) ◆ Measurement of bypass routes ◆ Measurement of blocking diodes (reverse current prevention diodes) ◆ Measurement of operating voltage of solar cell strings

• others

High-precision IV curve measurement device. Detailed measurement settings and automatic measurements can be performed without a PC. Ideal for the development and research of solar cells, such as outdoor exposure tests. [Demo unit available for loan◎]

We have adopted an electronic load method to achieve high-performance I-V curve measurement. Based on customer requirements, we will configure a solar cell evaluation system centered around this device. We can also propose systems such as measurement systems in open state and grid-connected measurement systems using power conditioners. Of course, it can also be used for maintenance purposes. ◆ Variable sweep direction: short circuit → open circuit, open circuit → short circuit, etc. ◆ Variable sweep time: 150[ms] to 1000[ms] ◆ I-V curves can be checked on-site using a high-resolution color monitor ◆ Measurement of special solar cells (CPV) from a single unit is possible ◆ Clear graph display through 1024-point measurement * For more details, please download the PDF or feel free to contact us. * Demo units are also available for loan, so please get in touch.

• Testing Equipment and Devices
• Other inspection equipment and devices

I-V curve tracer that measures the generation quadrant and reverse voltage quadrant with electronic load function and reverse voltage application function [Demo unit available for loan◎].

In addition to measuring the power generation quadrant characteristics of solar cells, measuring the reverse voltage quadrant characteristics allows for accurate short-circuit current (Isc) measurements and also enables the measurement of bypass diode characteristics within the solar cells. We will configure a solar cell evaluation system centered around this device to meet customer requirements. We can also propose systems such as measurement systems in an open state and grid-connected measurement systems using power conditioners. ◆ The electronic load and reverse voltage application function allow for I-V curve checks in both the power generation quadrant and the reverse voltage quadrant. ◆ The sweep direction is variable: short-circuit to open-circuit, open-circuit to short-circuit, etc. ◆ The sweep time is variable: 150 [ms] to 1000 [ms]. ◆ I-V curves can be checked on-site using a high-resolution color monitor. ◆ Measurements can be taken from a single special solar cell (CPV). ◆ Clear graph displays are achieved through 1024-point measurements. * For more details, please download the PDF or feel free to contact us. * Demo units are also available for loan, so please get in touch.

• Other electronic measuring instruments

It is a switching device used to measure multiple solar cells with a single measuring instrument during outdoor exposure tests and similar applications.

The connection method and number of channels can be adjusted to fit the system, and it will be delivered as a completely custom-made product. ● Capable of switching between 2-wire and 4-wire high voltage DC, with output to I-V curve tracers and PV analyzers, etc. ● Controlled by I-V curve tracers and PV analyzers, measuring each channel based on the set schedule. ● Can be connected to loads such as PCS and MPPT electronic loads.

• others

The "Mechanical Stitch Method" by Nichinichisui Road Machinery Co., Ltd. is a new technique that allows for the repair of metal cracks without the application of heat. By using special bolts and reinforcement plates, cracks are physically removed, and repairs are made without causing any thermal impact to the base material. Repairs can be carried out in environments where open flames cannot be used. Since no heat is applied, the disassembly of equipment is minimized. ◎ For more details, please contact us. ◎ If a detailed technical explanation is needed, please contact us.

The "Mechanical Stitching Method" by Nichinichisui Road Machinery Co., Ltd. is a new technique that allows for the repair of metal cracks without the application of heat. By using special bolts and reinforcement plates, cracks are physically removed, and repairs are made without causing any thermal impact on the base material. Repairs can be carried out in environments where open flames cannot be used. Since no heat is applied, the disassembly of equipment is minimized. ◎ For more details, please contact us. ◎ If a detailed technical explanation is needed, please contact us.

On November 6th (Thursday) to 7th (Friday), 2025, we held the "Human Body Day 2025" at the NAC Image Technology Akasaka Multi-Purpose Space. We have uploaded videos of the highlights from each company and the presentations that took place on the day to our website. We encourage you to take a look. ---[Report on Human Body Day 2025 is here]------------------- https://info.nacinc.jp/jintaiday2025-report ------------------------------------------------------------------------- On the day of the event, participants were able to experience a wide range of products in a hands-on session format, including motion capture, force plates, eye tracking, and human body analysis software. We received numerous comments from attendees expressing high satisfaction, saying, "It was great to gain various information all at once," which makes us very happy. NAC Image Technology will continue to provide "valuable products to our customers." We hope you will join us for our next event as well.

The date for the "Tokai Area Electrical and Electronic WEB Technology Seminar" for the 2026 fiscal year has been decided. Registration has started, so if you are interested, please apply. Multiple participants from one company are allowed, so please make use of this opportunity to acquire basic knowledge. 【April】Basic Knowledge of Resistors 【May】Technical Course on Capacitors 【June】Basics of Motors and How to Choose the Optimal Driver 【July】Fundamentals of IC Socket and Connector Selection 【September】Basics of Magnets 【October】Failure Phenomena of Chip Resistors and Their Countermeasures 【November】Temperature Protection Design Using Thermal Fuses

NDT Mart & Rental Co., Ltd. began selling its new electromagnetic ultrasonic thickness gauge, 'EMAT WIFI', on January 19, 2026. ◆ Electromagnetic Ultrasonic Thickness Gauge 'EMAT WIFI' The 'EMAT WIFI' is a thickness gauge that uses the electromagnetic ultrasonic (EMAT) method, which does not require a couplant (contact medium). Unlike conventional ultrasonic thickness gauges (UT), there is no need to apply a couplant; thickness measurements can be taken simply by placing the probe on the measurement target, making it ideal for beginners and screening in large-scale sites. It can measure materials with paint, scale, thick linings, and slight surface roughness, significantly reducing the hassle of pre-treatment. Additionally, it is equipped with WiFi communication capabilities, allowing for the confirmation and management of measurement data and waveforms in conjunction with smartphones and tablets. This facilitates smooth sharing of measurement results and data management on-site. It is optimal for measuring wall thickness and conducting corrosion inspections of plant equipment, piping, tanks, and steel structures. It contributes to the efficiency and reliability of thickness measurements in the field of non-destructive testing (NDT), such as maintenance inspections and equipment diagnostics.