A solar farm that is not continuously monitored can lose between 5 and 25 percent of its annual potential output without anyone noticing. Here are the six most common causes we’ve identified among our customers.
Without close monitoring at the string level, a faulty cell or a blown bypass diode can cause a string to lose 15 to 30 percent of its output for weeks without anyone noticing. Quarterly maintenance visits come too late.
An inverter that shuts down in night mode and doesn't restart in the morning results in the loss of an entire day's production. Without an automatic alert, the fault isn't discovered until the monthly report is reviewed—by which time the losses have already been recorded.
Dirt on the modules reduces output by 3 to 15 percent, depending on the region and season. Without comparing theoretical irradiance to actual output by area, it is impossible to schedule cleanings at the right time.
Does the P50 announced during the financing phase differ from the actual figures? Without a history of reliable data by inverter and by string, it is impossible to determine whether the underperformance is due to the array, weather data, or the initial simulation model.
Each unplanned trip to a remote site costs between €300 and €1,500 in technician time and transportation. Without early detection of anomalies, operators either conduct too many unnecessary preventive inspections or, conversely, respond too late.
Inverters collect internal data, but each brand has its own portal and its own export format. Consolidating data from a multi-brand fleet into a single report is a manual task that takes several hours each month.
The Eziwan gateway connects directly to the inverters and meters in your fleet via Modbus, then transmits the data to the cloud via 4G LTE—without a VPN, without opening any ports, and without an on-premises server.
The Eziwan industrial gateway mounts on a DIN rail in your control cabinet or directly in the central inverter’s equipment room. Power supply: 9–36 V DC. It operates in temperatures ranging from -40°C to +75°C and is designed for outdoor environments (IP40 standard, IP65 optional).
The Eziwan gateway communicates with your inverters via Modbus RTU over an RS-485 bus (up to 247 devices per bus) or via Modbus TCP over an Ethernet network. The SunSpec profile standardizes communication for compatible inverters, ensuring interoperability without the need for manual register configuration.
The built-in 4G LTE Cat.4 modem transmits data to the Eziwan cloud via an encrypted TLS tunnel. No network configuration is required on the client side. If the signal is lost, data is buffered locally (for up to 72 hours) and automatically transmitted once the connection is restored.
The data is sent to the Eziwan cloud platform, which is hosted in France. Access your production dashboards from any browser, set up alerts, view historical data, and export your reports. The REST API enables integration with your ERP, CMMS, or BI system.
From inverter monitoring to ENEDIS export data, including string monitoring and predictive alerts: a comprehensive platform for demanding renewable energy operators.
Centralize monitoring of all your inverters—whether they’re from SMA, Fronius, ABB, Huawei, or SolarEdge—in a single dashboard. Overview of the entire system, real-time status, active alarms, and daily production graphs.
Collection of DC measurements per string (current, voltage, power) via SunSpec-compatible optimizers or inverters. Automatic detection of underperforming strings through statistical comparison with identical strings on the same inverter.
Modbus connection to Linky or Téléinfo RS-485 meters for measuring energy fed into the grid and self-consumption. Automatic calculation of the self-consumption rate, the self-generation rate, and the energy fed into the grid for ENEDIS reports.
Set up alerts for inverter failures, string communication loss, temperature overshoots, and production deviations exceeding a configurable threshold. SMS notifications sent in less than 2 minutes, multi-level escalation, and silent mode during scheduled maintenance.
View daily, monthly, and annual production graphs by inverter, string, or farm. Zoom in on any time range, overlay weather data, and export to CSV for analysis in Excel or Power BI.
Import your PVsyst model or your irradiance weather data and view the difference between theoretical output and measured output in real time. Calculate the Performance Ratio (PR) by inverter and for the entire fleet, with a monthly history.
Automatically generate production reports in the format required by ENEDIS for feed-in declarations and the tracking of power purchase agreements. Consuel export for installations subject to inspection. Schedule automatic monthly exports.
Expose all production data in JSON via the Eziwan REST API (OAuth2). Connect your ERP, CMMS, or BI system without any custom development. Use webhooks to push alarm events to your ticketing tool.
Eziwan collects all the variables needed to monitor and optimize a solar farm, from AC power to 4G network quality signals.
Note: The availability of string-level measurements depends on the inverter model and brand. Not all inverters natively report DC currents by string. Some require power optimizers or junction boxes with built-in monitoring. Our team can audit your installation to determine the achievable level of granularity.
Installations on the roofs of logistics buildings, warehouses, and factories. Specific challenges: difficult roof access, multi-string inverters in the equipment room, and metering for self-consumption. The Eziwan gateway is installed in an electrical cabinet and connected via Modbus RS-485 to the central inverters and the generation meter.
Rural solar farms, often located in remote areas without wired network infrastructure. The 4G LTE connectivity built into the Eziwan gateway is particularly well-suited for this purpose. Each central inverter or string inverter is monitored via Modbus TCP or RS-485, depending on the model.
Agrivoltaic projects combine agricultural production and solar power generation on the same plot of land. The shade structures are often movable or adjustable. The Eziwan monitoring system allows users to correlate solar production data with agricultural data (irrigation, soil sensors) to optimize both activities.
For industrial and service sector customers subject to a power purchase agreement (OA), the accurate measurement of injected energy is a contractual requirement. Eziwan integrates ENEDIS metering and automatically calculates the volumes to be reported, thereby preventing disputes and adjustments during ENEDIS audits.
Photovoltaic monitoring is part of a comprehensive IIoT platform for industry and utilities.
Technical solutions for renewable energy operators, project developers, and engineering firms.
Share a list of your inverters and the total capacity of your fleet. Our team will prepare a customized monitoring plan for you and show you in 30 minutes what you could start monitoring as early as tomorrow. Compatible with your existing fleet—no hardware replacement required.