This integrated solution for power generation, storage and energy saving for the realization of Carbon-Free Society provided by a comprehensive wiring system manufacture.
We propose custom support both types of selling all electricity for power company (FIT) and self-consumption of solar power generation.
The solar power generation intelligent Monitoring and Control Systems (PVU-Finder®) monitors and controls solar power generation where all electricity is sold to power company .
This system is used in around 2,900 solar power plants (generating capacity of 2.5 GW), mainly large-scale solar power plants throughout Japan. This Monitoring and Control Systems from a comprehensive wiring system manufacturer with over 80 years of experience provides with continuous support for a purchase contract period of 20 years.
Custom design
The system can be flexibly customized for medium-sized to large-scale power generation
Server linking
Extensive experience with linking to overseas servers and servers of other companies
Safety
Redundant configuration of the main devices enables stable monitoring
Reliability
A reliable track record of participating in output control project by power company
Low-cost configuration
DC1500V string monitoring system can be built into connection box
PVU-Finder® Solar Power Generation Remote Monitoring Systems
Detect issues with solar power generation equipment at an early stage!
PVU-Finder is an integrated monitoring system equipped with string monitoring for high-voltage power plants and extra high-voltage power plants.
We offer flexible systems to meet customer demands according to solar power plants. In addition, the system supports output control based on demand of power companies.
Main features
Flexible customization to meet your needs
We provide Monitoring and Control Systems cutomized to your equipment for low-voltage, high-voltage, and extra high-voltage power plants. We offer support for centralized, distributed and multi-string power conditioning systems (PCS).
String monitoring for reduced maintenance costs
Panel output degradation and failures are monitored string by string, abnormalities are checked on the monitor screen, and alert notifications are sent via email. This system can also contribute to the detection of wiring errors during installation and initial panel defects, as well as enhance the efficiency of maintenance with the use of MATAS.
Streamlined system configuration and redundant data logger for stable monitoring
The use of new I/O enables measurement according to the customer’s application with a compact device configuration. The monitoring and control systems are built with redundancy for stable monitoring.
Use of terminal block with a built-in surge protection circuit without external SPD nor a noise suppression circuit
The string measurement unit and SI (RS485) terminal block unit inside the Monitoring and Control Systems are equipped with a surge protection circuit and external noise suppression circuit for lightning resistance equivalent to JIS C 5381-21 category C2.
Support for output control based on the demands of power companies!
This system supports PCS output control of solar power plants using old, new, and specified rules. It can be implemented in solar power plants being newly constructed or existing power plants that are already operating.
Main features
Support for output control based on the demands of power companies
This system has been implemented at power companies in Kyushu, Hokkaido, Tohoku, Hokuriku, Chugoku, Shikoku and Chubu regions, and there are plans to support power companies in Tokyo and Kansai regions as well.
Support for low-voltage, high-voltage, and extra high-voltage solar power plants
We have a track record of implementing this system in solar power plants of all sizes, and CDT communication control, which is essential for real-time control of extra high-voltage power plants, is supported for major manufacturers including Ohkura Electric, Tsuken Electric Ind, and Oi Electric.
Support for a wide range of PCS manufacturers
We support companies including ABB, SMA, Delta Electronics, Yaskawa Electric, TMEIC, Hitachi, Nissin Electric, Sanyo Denki, Huawei, and Sungrow.
Support for output control of solar power plants using specified, new, and old rules (shift to online operations)
With the output control functions, it is possible to control the optimal output values for all solar power plants, remotely control on/off operations, and shift to online operations for solar power plants under old rules, thereby reducing power generation opportunity loss. Real-time output control can also be supported with CDT communication for extra high-voltage solar power plants.
We can provide a remote monitoring system that is suitable for solar power plant equipment updates or when replacing systems from other companies.
At the same time, we can provide PCS output control functions and additional services.
Main features
Extensive experience
Our monitoring system has been installed at more than 2,900 solar power plants across Japan. In terms of output control, we were the only monitoring system manufacturer selected for a demonstration project by power company, and our system is used in many power plant service areas where output control is required.
A variety of monitoring functions
We offer systems to meet diverse needs, including low-voltage to extra high-voltage string monitoring, PCS monitoring, and high-voltage substation monitoring
Support for PCS of various companies including output control
Expanded functions for convenience
Using MATAS® failure prediction software for smart maintenance and AI diagnosis
Integrated monitoring screen for multiple sites
PCS output optimal control in addition to output control support
Solar power generation monitoring systems
String Monitor Unit
String monitoring for reduced maintenance costs
Panel output degradation and failures are monitored string by string, abnormalities are checked on the monitor screen, and monitoring notifications are sent via email. This can also contribute to the detection of wiring errors during installation and initial panel defects, as well as enhance the efficiency of maintenance with the use of MATAS.
Main features
Operates on own power supply (Uses connected PV string for power supply)
Available in PV voltages of 600 to 1000 VDC and 1500 VDC
Can be retrofitted with simple work, and measure up to 24 strings of current with a single unit
RS485 wired connection or wireless connection selectable *Wireless available for up to 1000 V
String current measured with high precision current sensors (measurement range: ±15A)
Diagnose signs of performance degradation of solar power generation equipment
This system assists in effective maintenance by diagnosing signs of performance degradation of solar power generation equipment using data acquired at solar power plants and a proprietary calculation algorithm.
Main features
Added a deviation rate evaluation function to MATAS® analysis to improve judgment accuracy
This helps separate the effects of ambient shadows and dirt on panels from causes of equipment-specific aging defects. It also helps to visualize any variations in string power generation current. (Box plot chart)
Added analysis result display functions using lists and graphs
Visualization using lists and graphs allows for more efficient and pinpointed maintenance.
Added functions for comparing solar radiation and generated power
A function for evaluating the power generation capacity with respect to solar radiation was added to see the improvement effect objectively. A function for evaluating the current contribution ratio was added to evaluate daily string capability.
System outline diagram
Determination of deviation rate and evaluation of current contribution index method
■Deviation rate evaluation
■Evaluation of current contribution index method■Evaluation of current contribution index method
Onamba Co., Ltd. (hereinafter referred to as "the Company") is committed to ensuring that our customers can use our products and services with confidence. To this end, The Company have established this Vulnerability Disclosure Policy to promote countermeasures against vulnerabilities discovered both internally and externally, and to implement robust security measures.
１．Collection of Vulnerability Information
The Company accepts reports regarding vulnerabilities discovered in our products and services through the contact point provided at the following link:
When contacting us, please provide the following information:
・A summary and brief description of the vulnerability.
・The name of the affected product/service or the relevant URL.
・Steps to reproduce vulnerability (including details of specific settings or inputs).
・Any relevant supporting information (screenshots, PoC, tool outputs, etc.).
２．Our Response Policy
The standard workflow for handling vulnerability reports is as follows:
１．Acknowledgment of Receipt
Upon receiving a report, The Company will promptly acknowledge receipt and notify you that an internal investigation has commenced.
２．Investigation and Remediation Process
・The design and development departments for the relevant product or service will investigate the impact of the reported vulnerability.
・The Company will perform an initial assessment to verify the validity and scope of the impact.
・The Company will verify reproducibility and collect detailed information.
・The Company will formulate corrective measures and implement technical fixes.
・The Company will verify the effectiveness of the technical measures implemented.
・The Company will apply the countermeasures to any other related systems or services.
３．Status Updates
The Company will provide periodic updates on the progress of the investigation and the implementation of corrective measures.
３．Disclosure of Vulnerability Information
・The Company will, as necessary, disclose information and progress updates regarding vulnerability responses for its products and services on its official company website.
・The date of disclosure will be determined in consultation with the reporter and the users of the relevant products and services.
４．Legal Protection (Safe Harbor)
The Company considers vulnerability reporting activities conducted in accordance with this policy to be authorized. The Company will not initiate legal action against individuals who submit reports in good faith.
Extension Cables and Solar-Related Products
See here for more information on extension cables, etc. and solar-related products.
