PV Soiling Monitoring Solution Product Overview

Mission Statement “Provide intelligent systems for the financially responsible and optimal deployment of solar power systems across the globe.

2011 2017Founded Scott, Bryan, and Catlin begin Fracsun. Received initial grant funding for proof of concept and development. Fracsun sensors installed on 14GW+ of PV. Patented United States patent issued for product. ARES soiling sensor and Fracsun portal commercially ready for deployment.

Fracsun at a Glance Fracsun soiling loss sensors deployed in key solar regions across the globe. 850+ Units deployed in 27+ Countries

• Measures on-site soiling loss • PV reference cell based soiling sensor • Automatically cleaned daily • Patented solution utilizing proprietary technology

ARES Soiling Sensor How it works Clean Ref. Cell Spray Nozzle

ARES Soiling Sensor How it works Clean Ref. Cell Spray Nozzle

Features • Matched PV reference cells • Integrated cellular modem (loT) or Modbus RS-485 • Integrated 120° spray nozzle • Threaded inserts for universal mounting • Fast installation, under 1 hour

ARES Soiling Sensor Other Features ● Compatible with innovative cleaning methods

• Compatible with innovative cleaning methods • Easy Visual Scan

• Compatible with innovative cleaning methods • Easy Visual Scan • Universal M12 automation receptacles to simplify wiring

ARES Universal Mounting Kits

Wash Extension • Enables automatic washing of the ARES clean reference cell • Water storage and high-pressure pumping system • Configurable wash schedule and durat

o Use distilled / filtered water o Lasts ~1 year between refills • Solar charged UPS battery system o 20W solar module o Lead-acid Battery o Charge controller • High pressure water pump • Infrared liquid level sensor • Mounting bracket w/ ground spikes

Autonomous Soiling Station

Data Flow and API Fracsun ARES Cellular Tower Fracsun Cloud *Cellular mode preferred Other Database

Data Flow and API Outbound API Intended for downloading data from the Fracsun Cloud to the site DAS asset management software. Intended for uploading raw soiling data from the DAS into the Fracsun Cloud. Primarily used when ARES in cellular mode. Primarily used when ARES is directly connected to the SCADA system via Modbus RS-485.

View soiling data and calculate financially optimal wash schedule based on PPA rate, washing cost, and expected rainfall Daily Soiling Loss Weekly Soiling Rate (%): 3.&4

• PV Reference Module (manually cleaned) • Optical (LED or Image Sensor) • Manually washing is burdensome • Spectral response unmatched to PV performance (calibration issues). • Small sensor area not representative of module soiling and patterns • Poor performance at sites with variable soiling types

Contact Fracsun Inc. 3450 Sacramento Dr. Ste. A San Luis Obispo, CA 93401 Catlin Mattheis CEO 805.674.0070 [email protected] Fracsun Inc. 3450 Sacramento Dr. Ste. A San Luis Obispo, CA 93401 Fracsun Inc. 3450 Sacramento Dr. Ste. A San Luis Obispo, CA 93401 Bryan Fisher COO 805.234.1385 [email protected] Scott Lewis CFO 805.234.1385 [email protected]