PES Solar 1 2021

TALKING POINT Inspired by Mars Atonometrics was founded in Austin, Texas, in 2007, with the mission to provide high-quality test and measurement equipment to the small but growing photovoltaics industry. The company founders came from a long background in test and measurement equipment for the semiconductor industry. The experience of the management team included over 30 years of R&D, product development, sales, marketing, and manufacturing. The company’s first products included light introduced in 2010 and that product was losses of 4 to 7%, with corresponding soaking systems and IV measurement followed by calibrated reference cells for revenue loss in the multibillion-dollar range. systems for PV module manufacturers and cost-effective irradiance measurements. And some locations, such as the Middle East, test labs. These products have been installed can experience soiling losses of 50% or more in factories and labs worldwide. Soiling: the accumulation of dust and other during dust storms. contaminants is a significant concern for This experience in the PV industry led the photovoltaic (PV) solar power plants. Soiling Soiling occurs primarily because airborne company to develop products for affects solar power generation by blocking particulate matter settles onto the surfaces operational PV plants. The company’s first sunlight from getting to the solar panels. It of solar panels and sticks to them. The rate of soiling measurement system was causes worldwide solar industry power soiling accumulation, usually discussed in 152 PES SOLAR

TALKING POINT terms of the daily increase in power loss in farm, or factory on one side of the plant or have plant-specific impacts, instrumentation between cleanings, varies between 0.1 to 1.0 due to prevailing winds. Studies have is needed to measure soiling losses on site. percent per day, depending on the amount reported up to 3% performance variations At operational power plants, ongoing and type of dust in the air, wind speeds, across a single plant due to location-specific measurement of soiling loss is an important humidity, and other conditions. The total soiling rates. component of performance monitoring. At soiling loss continues to grow until a cleaning pre-construction sites, soiling loss or rainfall event occurs. For PV power plant sites without regular rain, measurement is an important part of cleaning strategies need to be developed, resource assessment for future power plant Soiling is a location-specific phenomenon. keeping in mind the costs of cleaning which performance prediction. Not only are there are clear differences in vary significantly by cleaning method and soiling rates between geographic regions, plant location. The decision of how often and There are several methods for measuring but even on the local scale there can be when to clean is an economic one, increases soiling losses at PV plants. Atonometrics, is a significant differences in soiling rates in revenue due to cleaner solar panels should leader in the field and has been providing PV depending on local surroundings. Soiling exceed losses due to soiling. irradiance and soiling measurement systems rates can even vary significantly across a for over 10 years and has over 1,000 systems single PV power plant, perhaps due to a road, Since soiling losses are highly variable and installed in over 30 countries worldwide. The most common PV soiling measurement method is based on the comparison of two PV devices such as solar panels, reference cells, or a combination. One device is regularly cleaned, either automatically or manually, and the other device is allowed to soil naturally like the solar panels at the site. Comparing the soiled device to the clean one yields the impact of soiling loss. These methods require some labor and maintenance costs, either in manually washing a clean reference device or in periodic refilling of a water tank for automated cleaning. All-optical low-maintenance techniques are a recent development in soiling measurement technology. Atonometrics has developed a compact, easy-to-use measurement device called Mars™. This is a camera-based technology that requires no maintenance and no calibration procedures. 2 0.040 0.06 0.036 0.055 0.039 0.05 1 0 Distance (km ) 0.039 Average Soiling Rate (%/day) -1 Wind 0.061 0.028 0.045 0.04 -2 0.025 0.035 -3 0.03 FARM 0.065 -4 -4 -3 -2 -1 0 1 2 3 Distance (km )) Variation of soiling rates measured by 8 soiling sensors, distributed within a utility-scale solar power plant. Multi-year average daily soiling rates in %/day, shown in text and by circle radius in figure, are highest near the edge of the plant immediately down-wind of a farm. Soiling rates could be up to 2x the averages, as shown by the outer circles at each sensor location. 2 WWW.PESSOLAR.COM 153 0.039 1 0 -1 Wind -2 -3 -4 -4

TALKING POINT 1.00Soiling Ratio 0.98Rain (mm ) 0.96 0.94 0.92 0.90 Feb Mar Apr May Jun Jul Aug 10 5 Cleaning 0 Feb Mar Apr May Jun Jul Aug Top: soiling ratio the fraction of actual system power to expected clean-state power, measured by a soiling sensor at a site in California, showing varying soiling losses over time with rain and cleaning and heavy build-up in summer months. Bottom: Rain and cleaning events at the site. It is a completely hands-free operation newer optical technologies, such as Mars™, workshops, and magazines. when installed. enable soiling measurements on a wide In addition, the company has over 20 issued scale worldwide. and filed patents. The name for Mars came from a conversation with technologists at The Along the way, Atonometrics has become the To date, Atonometrics has installed several National Aeronautics and Space recognized technical experts in PV test and thousand products in over 30 countries and 6 Administration (NASA), inspired by the idea measurement technologies. This is continents worldwide. of serving remote locations for which any evidenced by over 30 published technical maintenance, or calibration procedures papers at the industry’s leading conferences, www.atonometrics.com would be difficult. Any sensors eventually deployed to Mars would have to be fully autonomous since maintenance technicians are difficult to find on Mars. So, the Atonometrics’ optical soiling sensor’s name was conceived with future Mars missions in mind. Mars™ was introduced to the market in 2018 and has since been installed in many PV plants worldwide. The low-cost, maintenance-free, and calibration-free aspect of good optical technologies has expanded the market for soiling measurement systems to smaller installations including commercial rooftops. Previously, these installations did not have the budget or on-site personnel to install soiling measurement technologies, but that is changing with the introduction of new techniques. Soiling measurement is becoming increasingly important to optimize PV power plant performance and revenue. The conclusion is that soiling measurement technologies are very cost-effective and 154 PES SOLAR



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ADVERTISERS’ INDEX WORK. EMPOWERED BY THE SUN! Reduce Costs Solis Commercial Reduce CO2 & Industrial PV Inverter Footprint Improve Solis-110K-5G Sustainability Efficient Safe Rest Assured 10 MPPTs, Max. efficiency 98.7%, > 150% DC/AC ratio AFCI protection, proactively reduces fire risk with Kooi Camera High power tracking density 90MPPT/MW Built-in PID recovery for better module performance (optional) Surveillance Compatible with bifacial modules Type I SPD for AC (optional) Keep your site safe from Smart Economic theft and vandalism Night SVG function Power line communication (PLC) (optional) Kooi is the specialist in the field of temporary Intelligent string monitoring. Smart I-V curve scan Support \"Y\" type connection in DC side mobile camera surveillance. With our Remote firmware upgrade with simple operation Supports aluminium wire access to reduce cost solutions, equipped with a siren and a spoken message, we prevent damage on your site. 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Test the new Solar-Log WEB EnerestTM 4 monitoring portal • Intelligent LivEye® analysis software (AI) • Live view and accurate predictions for the next 20 minutes and secure your customers’ yields in the long term. www.solar-log.com • Detection Range up to 200 m • Coverage of up to 10 x 10 km² per system • Mast height of 8.50 m • Solar irradiance map with up to 5 x 5 m² resolution • 150 l fuel tank • Up to 3 months self-sufficient operation Your experts in solar resource assessment. with one tank filling www.cspservices.de | [email protected] Cologne, Germany | Almería, Spain • The location can be changed quickly • Optional: Customer camera | Thermal imaging cetisPV The Innovation Hub for New Energy Solutions module tester line MESSE MÜNCHEN, GERMANY camera | Time-lapse camera High precision Class A+A+A+ RESTART 2021 www.liveye.com measurement systems for PV modules For a renewable, decentralized and digital energy industry LivEye GmbH Europa Allee 56b | D 54343 Föhren • Available for large solar modules Cross-sector solutions for electricity, heat and mobility Phone: +49 6502 4034722 | Hotline: +800 77110888 up to 2600 mm x 1600 mm From the latest insights to current best practice examples Meet 20,000+ energy experts and 800 exhibitors at four parallel exhibitions • Applicable for all kinds of technologies Be Part of the Leading Energy Exhibitions and Conferences at The smarter E Europe including PERC, TOPCon, HJT and thin film • Fast and high precision IV and EL measurement up to 180 modules/h • Lab system with automatic power rating matrix measurement • Future-proof and upgradable due to modular design The Innovation Hub for New Energy Solutions Revolutionary p-PERT Bifacial MESSE MÜNCHEN, GERMANY PV Cell & Module Technology RESTART 2021 p-PERT TECHNOLOGY FINANCIAL KEY FACTS For a renewable, decentralized and digital energy industry § Simple & stable cell structure § 25% cost of energy (LCOE) reduction vs. Cross-sector solutions for electricity, heat and mobility § Controllable Boron Doping, on Boron or Ga Doped monofacial modules. 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SolAround is seeking strategic BIFACIAL PV CONCEPT RENEWABLE ENERGY partners and solar energy players to leverage our technology towards High efficiency + High efficiency = Leading total & Lower Looking for a partner with strong higher solar projects’ revenues by front side (open) rear side system efficiency LCOE sustainable commitments? forming vertical JVs in the US and We have. Europe, manufacturing cells and Front-side Substantial panels, installing systems, and collection reflected & For sustainability in all fields selling electricity. scattered At Stäubli Renewable Energy, we offer you a strong base for your sustainable Rear-side energy success. Our products and services are designed to function reliably and collection flawlessly over the long term. They are completely tailored to your needs, to ensure that you can achieve your renewable energy goals with confidence. Ground reflection Stäubli – Connections for sustainable change (Albedo) www.staubli-renewable-energy.com Israel Headquarters Germany R&D Lab Avishai Drori Dr. Harold Wiener STA_ECS_PV_Poster_210526.indd 1 Lev Academic Center Rudolf-Diesel-Straße 15, CEO Active Chairman 21 HaVaad Haleumi Street D-78467 Konstanz [email protected] [email protected] Jerusalem 9372115 Israel Germany 5/28/2021 10:51:13 AM IBC Solar: 95 Solis: 113 Soltaro: 129 www.ibc-solar.com/commercial www.solisinverters.com www.soltaro.com CSP Services: 103 Solar Log: 117 SNEC: 134 www.cspservices.de www.solar-log.com www.snec.org.cn h.a.l.m.: 107 The Smarter E Europe: 122 EKO: 135 www.halm.de www.thesmartere.de www.eko-eu.com PES Solar: 112 SolAround: 123 Staübli: 144 www.pessolar.com www.sol-around.com www.staubli-renewable- energy.com WWW.PESSOLAR.COM 157

ADVERTISERS’ INDEX FREE TO Have you discovered the solution that outperforms ROAM traditional optimizers? ©2021 Howmet Aerospace Inc. All rights reserved. Systems with SMA ShadeFix optimization deliver: HUCK® RANGE FORCE™ BY MAKITA SimpleMeasure No hose to pull. No power source to fuel. Just untethered joining – even in hard-to-reach places – using a • Greater annual energy production single finger to adjust from zero to 4,500 pounds. Range Force is powered by a standard Makita® 18V lithium • Higher reliability with fewer Building survey battery, so you’re free to roam anywhere around the job site. Contact Howmet Fastening Systems today. Measurement We’re here to set you free. component failures PV layout • Reduced service risk with Uses nosepieces for HuckBolts® Learn more about Huck Documentation and Huck® structural blind rivets products for PV panels and paramount service support up to 1/4” diameter. frames or email sales at Watch the video at 9,15 m [email protected] SMA-America.com/ShadeFix “We recommend SMA to homeowners because SMA’s ShadeFix optimization technology produces more energy on an annual basis than module level optimizers.” Michael Brown, President/CEO Solar-Ray, Inc. www.solar-ray.net HWT_RangeForce PES Solar_0621.indd 1 5/19/21 4:19 PM SimpleMeasure 6,32 m Building survey 6,32 m Measurement PV layout Documentation 9,15 m Complete measurement More details! and survey work digitally on site and speed up your bidding and documentation processes. Layout and install your PV-modules on any type of roof and direcly see the results. ETU Software GmbH | www.etu-software.com/SimpleMeasure Anzeige_PES 106x297.indd 1 05.05.2021 13:16:37 More details! Howmet: 145 SMA: IBC Complete measurement www.hfsindustrial.com www.sma-america.com/ and survey work shadefix digitally on site Campbell Scientific: 151 and speed up www.campbellsci.com/pes211 FIMER: OBC your bidding and www.fimer.com documentation processes. Atonometrics: 155 www.atonometrics.com Layout and install your PV-modules on any type of roof ETU Software GmbH: 158 and direcly see the results. www.etu-software.com/ simplemeasure ETU Software GmbH | www.etu-software.com/SimpleMeasure 158 PES SOLAR

ADVERTISERS’ INDEX Have you discovered the solution that outperforms traditional optimizers? Systems with SMA ShadeFix optimization deliver: • Greater annual energy production • Higher reliability with fewer component failures • Reduced service risk with paramount service support Watch the video at SMA-America.com/ShadeFix “We recommend SMA to homeowners because SMA’s ShadeFix optimization technology produces more energy on an annual basis than module level optimizers.” Michael Brown, President/CEO Solar-Ray, Inc. www.solar-ray.net WWW.PESSOLAR.COM 159