Every minute, the E-Dust compares the full I-V curves of two identical modules, one kept clean and one left to soil like the plant, and returns the soiling ratio at the maximum power point, as defined in IEC 61724-1.
| Inputs | 2 PV modules, four-wire (clean and soiled) |
|---|---|
| Maximum input | 80 V · 25 A |
| Recommended at STC | up to 65 V · 20 A per module |
| Accuracy | ±0.3 % V and I · ±0.5 % P |
| Resolution | 2.5 mV · 0.3 mA |
| Measurement | one I-V curve per module per minute |
| Temperature | Voc method (IEC 60904-5); 2 × PT1000 optional |
| Communication | Modbus TCP or TCP/IP to PVET · RJ45 |
| Protection | IP67 and IP51 versions |
| Power | 12/24 V DC · 200 mA at 12 V |
| Size and weight | 215 (244) × 150 × 60 mm · 1.0 kg |
Soiling is rarely uniform, and neither is the loss. Sensors that only compare short-circuit current see the light that does not arrive; the E-Dust measures the power that is not produced, which with uneven soiling can be much higher.
It works with two reference modules of the plant's own model: one is kept clean and the other soils like the rest of the array. Every minute it traces the full I-V curve of each one (150 points, four-wire connection) and calculates the soiling ratio, calibrated and temperature-compensated. The results go to the SCADA over Modbus TCP or directly to PVET Data Analytics, which shows daily, monthly and yearly losses and helps decide the best moment to clean.
The smallest, lightest and fastest I-V curve tracer on the market. Up to 200 curves per hour on modules and strings, bifacial included, with every curve translated to standard test conditions (STC) on the spot.
The E-Ref measures the short-circuit current and open-circuit voltage of a reference module of the same type as the plant's, and delivers irradiance and cell temperature to the SCADA by Modbus, with no further conversion. Versions for monofacial and bifacial modules.
Handheld tester for essential safety and commissioning tests on PV systems up to 1500 V DC and 25 A, with I-V curve tracing.
