In the summer of 2012, when we started working with Marvin Hamon and Greg Ball on the article “1,000 Vdc Utilization Voltages in Nonresidential PV Applications”, exactly one module manufacturer (MEMC) had publicly announced the release of a listed 1,000 V–rated PV module. Fast-forward 6 months, and over 200 different models of listed 1,000 V PV modules are available from 17 different manufacturers. It does not take a crystal ball to see where this is heading. More 1,000 V–rated products in every equipment class are on the way.
This article is intended to provide a representative snapshot of 1,000 V product availability at press time (February 2013). Since the certification and availability of products listed for 1,000 Vdc systems is changing rapidly, we do not expect this list to be comprehensive. In addition to the module, inverter, combiner and BOS product lines covered here, several manufacturers have initial or additional certification efforts either planned or under way.
While several module manufacturers have announced certification to UL 1703 for systems with maximum voltages of 1,000 Vdc over the last year, more have either quietly achieved this listing or have related testing and certification under way. We reached out to 65 module manufacturers that are active in the North American market for updates on 1,000 Vdc certification efforts, and discovered that roughly 25% of these companies either have listed 1,000 V PV modules or will soon. The following summaries include brief corporate backgrounds and overviews of specific product lines that are listed to UL 1703 for 1,000 V applications.
Integrators should be aware that during our research we identified instances where module specification sheets posted on a given company’s website were not up-to-date regarding 1,000 Vdc listing, even if the certification was complete. If you are planning to develop “in-front-of-the-fence” 1,000 V systems that require components to be listed to relevant UL standards, and you currently have preferred module suppliers that are not covered here, we recommend that you ask for updates through your regular sales channels.
Canadian Solar Founded in 2001 in Ontario, Canada, Canadian Solar is a publicly traded corporation that was listed on the NASDAQ Stock Market in 2006. The firm currently operates in 11 countries, with US sales offices located in San Ramon, California. In July 2012, Canadian Solar received certification to UL 1703 for maximum system voltages of up to 1,000 Vdc on four of its module lines. The certified product lines include UL 1000V CS6P-M (60-cell, mono, 245 W–260 W), UL 1000V CS6P-P (60-cell, poly, 240 W–255 W), UL 1000V MaxPower CS6X-M (72-cell, mono, 295 W–310 W) and UL 1000V MaxPower CS6X-P (72-cell, poly, 290 W–300 W). CSA Group performed testing and certification.
Canadian Solar / 925.866.2700 / canadiansolar.com
Centrosolar America Centrosolar America is headquartered in Scottsdale, Arizona, and its parent company, Centrosolar Group AG, was founded in 2005 in Munich, Germany. The publicly traded company introduced its modules to the US market in 2008 and recently listed its 60-cell polycrystalline E-Series module line to 1,000 Vdc. Intertek performed testing and certification to UL 1703. The 235 W to 265 W 1,000 Vdc– rated modules have a Q2 2013 projected release date.
Centrosolar America / 877.348.2555 / centrosolaramerica.com
Conergy Americas Conergy Group, a German module manufacturer, project developer and equipment wholesaler, was founded in 1998 and is listed on the Frankfurt Stock Exchange. Its US subsidiary was established in 2005 and is headquartered in Denver. CSA Group has tested and listed the company’s PH Series modules to UL 1703 for maximum system voltages of 1,000 Vdc. The 60-cell polycrystalline PH Series modules are available with rated power outputs of 230 W to 255 W. Conergy North America is scheduled to release a new PE Series module line in Q1 2013. Initially the product line will be listed for 600 Vdc applications, but the company plans to have the line listed for 1,000 Vdc applications in early 2013.
Conergy Americas / 888.396.6611 / conergy.us
DelSolar Founded in 2004 at the Hsinchu Science Park in Taiwan, DelSolar is a joint venture of Delta Electronics and the Taiwanese Industrial Technology Research Institute. In September 2012, UL listed four of DelSolar’s module lines for 1,000 Vdc applications: D6C_B3A-WS (60-cell, poly, 230 W– 250 W), D6S_B3A-WSf (60-cell, mono, 250 W–260 W), D6C_B4A-WS (72-cell, poly, 285 W–305 W) and D6S_B4A-WSf (72-cell, mono, 300 W–310 W).
DelSolar / 888.880.8868 / www.delsolarpv.com
ET Solar Headquartered in Pleasanton, California, ET Solar is the US subsidiary of the privately held ET Solar Group, based in Nanjing, China. The company announced the launch of its 60-cell and 72-cell 1,000 Vdc–listed module lines at PV America East. The recently listed modules received certification to UL 1703 for 1,000 Vdc applications in January 2013. Intertek conducted the testing and certification. The relevant module lines include ET-P-WW (60-cell, poly, 225 W–260 W). ET-P-WB (72-cell, poly, 280 W–310 W), ET-P-WWG Anti-glare (72-cell, poly, 270 W–295 W) and ET-P-BBG Antiglare (72-cell, poly, 270 W–290 W, black frame and backsheet).
ET Solar / 925.460.9898 / etsolar.com
First Solar First Solar was founded in 1999 and is headquartered in Tempe, Arizona, with manufacturing facilities in Malaysia and Perrysburg, Ohio. The company launched its IPO in November 2006 and is traded on the NASDAQ Stock Market. For years, First Solar has been deploying its thinfilm CdTe PV laminates in utility-owned 1,000 V, behind-thefence projects. In October 2012, the manufacturer and project developer completed the UL listing of its Series 3 module line for use in systems with a maximum voltage of 1,000 Vdc. The Series 3 product line currently includes five models with power outputs of 82.5 W to 92.5 W.
First Solar / 877.850.3757 / firstsolar.com
JA Solar USA Founded in 2005, JA Solar Holdings is headquartered in Shanghai, China. The vertically integrated cell and module manufacturer was publicly listed on the NASDAQ Stock Market in February 2007. The company’s US subsidiary, JA Solar USA, is headquartered in San Jose, California. JA Solar USA offers an extensive suite of nine module lines that Intertek or TÜV Rheinland NA listed for 1,000 Vdc applications per the UL 1703 standard, including JAM6 (60-cell, mono, 250 W–270 W), JAM6-R (60-cell, mono, 255 W–275 W, full square cells), JAM6-BK (60-cell, mono, 245 W–265 W, black frame and backsheet), JAP6 (60-cell, poly, 235 W–260 W), JAP6-BK (60-cell, poly, 235 W–255 W, black frame and backsheet), JAM5-L (72-cell, mono, 195 W–215 W), JAM5-L-BK (72-cell, mono, 190 W–210 W, black frame and backsheet), JAP6 (72-cell, poly, 280 W–310 W) and JAM6 (72-cell, mono, 290 W–325 W).
JA Solar USA / 408.586.0000 / jasolar.com
MEMC Headquartered in St. Peters, Missouri, and founded in 1959, MEMC Corporation manufactures semiconductors for electronic devices as well as polysilicon, solar cells and modules for PV applications. The company launched its IPO in July 1995 and is traded on the New York Stock Exchange. In 2009 MEMC completed the acquisition of SunEdison, a well-known solar project developer that recently expanded into the residential installation market in the US. In April 2012, MEMC announced CSA listing of its Silvantis P290 module series to UL 1703 for 1,000 Vdc applications. MEMC now has two primary module lines that are certified for systems with maximum voltages of 1,000 Vdc: the 72-cell polycrystalline Silvantis P series with a rated output of 280 W to 305 W and the 72-cell monocrystalline Silvantis M series with a rated output of 305 W to 330 W.
MEMC / 636.474.5000 / memc.com
Motech Americas Motech Americas is the US subsidiary of Motech Industries, a public Taiwanese PV cell and module manufacturer founded in 1981 as a test and measurement equipment manufacturer. The US subsidiary is headquartered in Newark, Delaware, where it manufactures ARRAcompliant monocrystalline and polycrystalline modules. In October 2012, Motech Americas announced that its IM+ Series and XS+ Series modules had achieved certification for use in 1,000 Vdc systems. Intertek performed the related product testing and listing to UL 1703. The relevant models include IM60+ (60-cell, poly, 250 W–260 W), XS60+ (60-cell, mono, 255 W–265 W), IM72+ (72-cell, poly, 300 W–310 W) and XS72+ (72-cell, mono, 310 W–320 W).
Motech Americas / 302.451.7500 / motechsolar.com
Phono Solar USA SUMEC Group, headquartered in Nanjing, China, is the parent company of Phono Solar USA and six additional Phono Solar subsidiaries that operate throughout Europe and Asia. The company conducts all module manufacturing in Nanjing. The US subsidiary is headquartered in The Woodlands, Texas. Intertek tested and listed two of Phono Solar USA’s primary module lines for 1,000 Vdc applications, including Diamond 235-265 (60-cell, poly, 235 W–265 W), Diamond 280-330 (72-cell, poly, 280 W–330 W), Diamond 190-210 (72-cell, mono, 190 W–210 W), Onyx 235-265 (60-cell, poly, 235 W–265 W, black frame and backsheet) and Onyx 235-270 (60-cell, mono, 235 W–270 W, black frame and backsheet).
Phono Solar USA / 281.909.0644 / phonosolarusa.com
REC Americas REC Americas’ parent company, REC Group, is headquartered in Sandvika, Norway, and is traded on the Oslo Stock Exchange. The company produces polysilicon for the solar and electronics industries at two US materials plants located in Moses Lake, Washington, and Butte, Montana. The company’s wafer, cell and module production is located in Tuas, Singapore. REC Americas is headquartered in San Luis Obispo, California. In February 2013, the manufacturer completed the listing of its Peak Energy 72 Series modules to UL 1703 for 1,000 Vdc applications. UL performed the testing and certification process. The 72-cell polycrystalline product line includes five models with rated power outputs of 285 W to 305 W.
REC Group / 877.332.4087 / recgroup.com
Renesola Established in 2005, Renesola is a vertically integrated PV manufacturer that is active from polysilicon production to module assembly. The company has manufacturing facilities spread across three locations in China, with its US headquarters located in San Francisco. The company was listed on the New York Stock Exchange in 2008. In November 2012, UL completed testing and certification of several Renesola module lines for 1,000 Vdc applications including JCS-24/Bbh (60-cell, mono, 250 W–260 W), JCM- 24/Bbh (60-cell, poly, 250 W–260 W) and JCM-24/Abh (72- cell, poly, 300 W–310 W). Listed models with black frames and backsheets are also available.
Renesola / 415.852.7418 / www.renesola.com
SolarWorld SolarWorld’s US subsidiary conducts ingot, wafer, cell and module manufacturing at its corporate headquarters and production facility in Hillsboro, Oregon. All modules produced at the Oregon location meet ARRA domestic content requirements. SolarWorld USA’s parent company, SolarWorld Group, is headquartered in Bonn, Germany. The Group launched its IPO in 1999 and is traded on the Frankfurt Stock Exchange. SolarWorld offers several products within its Sunmodule PV line that have received certification for use in 1,000 Vdc systems per the UL 1703 standard. Listed products include the 60-cell Sunmodule 255 W to 270 W monocrystalline models, as well as the 60-cell 250 W to 260 W Sunmodule Mono Black products. Intertek and/or TÜV Rheinland NA completed testing and listing to the UL standard for 1,000 Vdc applications.
SolarWorld / 855.467.6527 / solarworld-usa.com
Suniva Headquartered in Norcross, Georgia, Suniva is a privately held US manufacturer of monocrystalline and polycrystalline PV cells and modules. The company’s Optimus product lines contain more than 80% domestic content and are ARRA compliant. In January 2013, Suniva announced the listing of the Optimus product models to UL 1703 for 1,000 Vdc applications. These lines include OPT-60-4-100 (60-cell, mono, 255 W– 270 W), OPT-60-4-1B0 (60-cell, mono, 255 W–265 W, black frame and backsheet) and OPT-72-4-100 (72-cell, mono, 300 W–315 W). Intertek performed the testing and certification for these recently listed product lines.
Suniva / 404.477.2700 / suniva.com
Suntech Americas Suntech Power Holdings operates regional headquarters in China, Switzerland and the US. The company entered the North American market in 2004 and was listed on the New York Stock Exchange in 2005. Suntech’s US headquarters is located in San Francisco, with domestic module assembly in Goodyear, Arizona. In August 2012, the manufacturer announced the certification of its Ve-Series modules to UL 1703 for 1,000 Vdc applications. The 72-cell polycrystalline module line includes models with rated power outputs of 290 W to 305 W. CSA conducted the testing and listing on the Ve-Series modules to the UL standard.
Suntech / 866.966.6555 / am.suntech-power.com
Trina Solar Founded in 1997, Trina Solar is a vertically integrated manufacturer of PV ingots, wafers, cells and modules that is headquartered in Changzhou, China. Manufacturing and R&D activities are conducted at the company’s Changzhou campus. Trina Solar was listed on the New York Stock Exchange in 2006 and operates 12 offices worldwide, including its US headquarters in San Jose, California. The manufacturer completed TÜV Rheinland NA testing and certification to UL 1703 for 1,000 Vdc applications in December 2012 for its TSM-PD14 and TSM-PD05 module lines. The 72-cell, polycrystalline TSM-PD14 line is available with power outputs of 285 W to 305 W. The 60-cell, polycrystalline PD05 line will be launched in the near future.
Trina Solar / 800.696.7114 / trinasolar.com
Yingli Green Energy Headquartered in Baoding, China, Yingli operates more than 20 subsidiaries and offices worldwide, including US offices in San Francisco and New York. The company’s manufacturing activities include all aspects of the PV value chain, from polysilicon production to module assembly. Yingli was founded in 1998, launched its IPO in 2007, and is traded on the New York Stock Exchange. In September 2012, the manufacturer announced the listing of its polycrystaline YGE-U 72 Cell Series to UL 1703 for 1,000 V applications. UL completed the testing and certification. The YGE-U 72 Cell Series modules were developed specifically for utility-scale projects and are available with output ratings of 285 W to 305 W.
Yingli Green Energy / 888.686.8820 / yinglisolar.com/us
At least ten inverter manufacturers currently offer 1,000 V inverters that are certified to UL 1741. The majority of these companies announced the release of their listed 1,000 V inverter lines in 2012. Only American Electric Technologies (AETI), GE Energy and Nextronex were earlier to market. While most of the 1,000 V products currently available are intended for utility applications, several companies offer high-capacity inverters that can be interconnected at 480 Vac. Power-One is the only company at press time with listed 1,000 V inverters rated less than 150 kW in capacity. REFUsol plans to release 1,000 V versions of its 3-phase string inverters in 2013. It is reasonable to expect that many other companies plan to release listed 1,000 V inverters in 2013 and in years to come, and that product offerings will become more diversified over time.
Advanced Energy (AE) Headquartered in Fort Collins, Colorado, AE Solar Energy has certified its AE 500NX-1kV inverter to UL 1741. Formerly known as the Solaron 500 kW 1kV, the AE 500NX-1kV is a 500 kW transformerless inverter that uses a 1,000 Vdc single-array configuration. AE also offers integrated 1 MW to 2 MW power stations based on the NX inverter platform. (See photo on p. 42.) A prewired PowerStation NX includes up to four AE 500NX-kW inverters, a medium-voltage transformer, a distribution switchboard, dc subarray combiners and dc disconnects. No additional weatherproofing is required, and a single truck can deliver a power station of up to 2 MW in capacity.
Advanced Energy / 800.446.9167 / solarenergy.advanced-energy.com
AEG Power Solutions Headquartered in the Netherlands, AEG Power Solutions Group is the sole subsidiary of the holding company 3W Power, which is based in Luxembourg and has US offices outside Dallas. In September 2012, AEG announced the certification of its 1,000 V Protect PV.500-UL inverter to UL 1741. TÜV Rheinland NA performed testing and certification. Using an appropriate transformer, the product can be adapted for use at 480 Vac or common medium-voltage levels. A 1 MW turnkey container solution is also available that integrates a pair of ProtectPV.500-UL inverters with disconnects, switchgear and a medium-voltage transformer. While the standard inverter enclosure is indoor rated, an outdoor enclosure system is available as an option.
AEG Power Solutions / 469.229.9604 / aegps.com
AETI Headquartered in Houston, AETI is a publicly traded company specializing in power delivery solutions. It was one of the first companies to test a 1,000 V inverter to UL 1741. In June 2011, the company announced that TÜV Rheinland NA had validated the compliance of AETI’s Integrated Solar Inversion Station (ISIS) to UL 1741. The ISIS solution is available at two capacity levels (1 MW and 1.5 MW) and with two medium-voltage interconnection options (15 kV and 38 kV). When the solar inversion and utility interconnection platforms are supplied together, the entire assembly—inverter, step-up transformer and interconnection switchgear—is witness tested to comply with UL 1741 and ANSI C.37.
AETI / 713.644.8182 / aeti.com
Bonfiglioli With world headquarters in Bologna, Italy, and North American headquarters in Hebron, Kentucky, Bonfiglioli specializes in power transmission and control in industrial, mobile and renewable energy applications. In November 2012, Bonfiglioli announced the certification of its 1,000 V RPS TL-UL inverter series to UL 1741. The RPS TL-UL system is modular and scalable from 367 kW to 1.4 MW. Power modules can be configured in a masterslave configuration to maximize conversion efficiency and extend component life or in a multi-MPPT configuration to accommodate subarrays with different PV technologies or orientations. Both floating and grounded array configurations are supported. The RPS TL-UL enclosure is rated for indoor installations.
Bonfiglioli USA / 859.334.3333 / bonfiglioliusa.com
Eaton Headquartered in Cleveland, Eaton is a global diversified power management company. Eaton’s 1,000 V solar product portfolio includes two large power block inverters for utility-scale applications. A modular design ensures fault tolerance. The Power Xpert Solar 1,500 kW uses three independently isolated 500 kW power trains, whereas the Power Xpert 1,650 kW uses a three-by–550 kW configuration. Critical components are designed for reliability. Power electronics are located in a dust- and water-free environment and liquid cooled. Each inverter can be close-coupled with a step-up transformer in a configuration without skids that results in smaller pad sizes. The enclosure is outdoor rated. A coldweather package, which extends the minimum temperature limit from -20°C to -40°C, is available as an option. Listing to UL 1741 is pending on both products.
Eaton / 855.386.7657 / eaton.com
GE Energy Headquartered in Fairfield, Connecticut, GE is a diversified global conglomerate with four primary business divisions. The company offers its solar solutions through the GE Energy division. In September 2011, the company announced that GE Energy’s 1 MW Brilliance Solar Inverter had received UL 1741 certification, making it one of the first high-capacity, listed 1,000 V inverters. The product is intended for multimegawatt PV projects. The 1 MW Brilliance Solar Inverter has a standard voltage output of 480 Vac and is optimized for direct grid connection via a mediumvoltage transformer. The enclosure is outdoor rated.
GE Energy / ge-energy.com
Ingeteam Headquartered in Zamudio, Spain, Ingeteam specializes in electrical engineering and equipment manufacturing. The company’s US operations are located in Milwaukee. Inverters in the Ingecon Sun PowerMaxter U family are rated for outdoor installation and ETL certified to UL 1741 at 1,000 V. Inverters in this product line range in capacity from 375 kW to 880 kW. The Ingecon Sun PowerMaxter TL U inverter modules are transformerless for direct connection to a medium-voltage transformer. The Ingecon Sun PowerMaxter T U models (375 kW or 500 kW) are sold with a transformer for connection at 480 Vac. Integrated turnkey power stations rated from 750 kW to 1,760 kW are also available.
Ingeteam / 408.524.2929 / ingeteam.com
Nextronex Headquartered in Toledo, Ohio, Nextronex develops and manufactures utility-scale inverter systems. In July 2010, the company announced that its Ray-Max 150 Solar Inverter had been certified to UL 1741 at 1,000 V, making it the first listed 1,000 V inverter available in North America. The Nextronex Ray-Max system is a modular power conversion system in which multiple 150 kW transformerless inverters are distributed alongside a high-current dc bus assembly. Since its inception in 2009, Nextronex has sold more than 20 MW of its Ray-Max solution, 98% of which is wired for 1,000 V operation.
Nextronex Energy Systems / 419.838.7889 / nextronex.com
Power-One Headquartered in Camarillo, California, Power- One is a global power conversion company with a focus on renewable energy applications. The company offers both string and central inverter products that are certified to UL 1741 at 1,000 V. The Aurora Trio is an outdoor-rated transformerless 3-phase string inverter with dual MPPT inputs that is available in two capacity levels, 20 kW and 27.6 kW. The Aurora Trio product line is currently the only 1,000 V–rated string inverter available in North America. The liquid-cooled outdoor-rated Aurora Ultra central inverter line is designed using multiple 390 kW power stages and is available in three different capacity levels: 780 kW, 1,170 kW and 1,560 kW.
Power-One / 805.987.8741 / power-one.com
REFUsol Headquartered in Metzingen, Germany, REFUsol specializes in designing and manufacturing PV inverters. It has North American operations in Fremont, California. The company plans to release a line of 1,000 V 3-phase string inverters certified to UL 1741 in late Q2 2013. Like REFUsol’s current K-UL product line, the 1,000 V models will be available with output power ratings of 12 kW, 16 kW, 20 kW and 23 kW and are designed for a 3-phase 480 Vac interconnection. A 1,000 V–rated 10 kW inverter is also in the works that will interconnect at 208 Vac. The company also plans to release a line of higher-capacity central inverters certified at 1,000 V later this year.
REFUsol / 480.775.7744 / refusol.com
Solectria Renewables Headquartered in Lawrence, Massachusetts, Solectria specializes in manufacturing utility-interactive inverters. The company plans to release a new 1,000 V product line, the SGI XT-1000V Series, with power ratings of 500 kW, 630 kW and 750 kW. Based on Solectria’s existing SMARTGRID inverter series, the new models will be manufactured in the US, certified to UL 1741 and designed for direct coupling with external transformers for commercial or utility-scale applications. The company will also offer turnkey Solar Stations rated for 1 MW, 1.25 MW or 1.5 MW, which will integrate a pair of 1,000 V inverters with a medium-voltage transformer and switchgear on a skid, with or without an additional enclosure.
Solectria Renewables / 978.683.9700 / solren.com
SMA America Headquartered in Niestetal, Germany, SMA is the leading manufacturer of solar inverters worldwide. The company has North American headquarters in Rocklin, California, and in Toronto. In August 2012, SMA announced that the newest inverters in its Sunny Central product line were certified to UL 1741 at 1,000 V. The five models in the UL-listed Sunny Central CP-US product line are nominally rated at 500 kW, 630 kW, 720 kW, 750 kW and 800 kW. If the ambient temperature is under 25°C, these inverters can continuously operate 10% above their nameplate power rating. Sunny Central CP-US inverters can be coupled to any utility grid or 3-phase commercial service via an appropriate external transformer.
SMA America / 916.625.0870 / sma-america.com
Woodward Headquartered in Fort Collins, Colorado, Woodward is a technology provider to the aerospace and energy industries. In 2011, Woodward acquired IDS of Switzerland, a manufacturer of utility-scale inverters for PV and wind power plants. The company currently offers two UL-certified 1,000 V inverters rated at 250 kW and 500 kW, the SOLO 250 and SOLO 500, and expects to release additional models in 2013. Woodward’s central inverters are liquid cooled and utilize a modular powertrain that provides for multiple-MPPT inputs. Outdoorrated inverters are available as an option. The company also offers listed 1,000 V source-circuit combiners.
Woodward / 970.498.3455 / woodward.com
Combiner boxes were some of the first PV products to be certified at 1,000 Vdc to UL standards. In addition to the combiner box manufacturers profiled here, several of the inverter companies mentioned earlier—such as Eaton, Solectria and Woodward—offer listed 1,000 V combiners.
AMtec Solar Recently relocated from Hayward, California, to Pleasanton, California, AMtec Solar is a division of AMtec Industries, which engineers and manufactures custom control panels for a variety of industries. ETL is the Nationally Recognized Testing Laboratory used to certify the company’s 1,000 V–rated solar solutions to UL 1741. They include sourcecircuit combiners and subarray combiners with or without current monitoring and disconnecting features. Listed 1,000 V–rated circuit-breaker recombiners and load-break–rated safety switch cabinets are also available. AMtec Solar’s latest 1,000 V product offering is a bipolar recombiner with optional subarray monitoring.
AMtec Solar / 510.887.2289 / amtecsolar.com
Bentek Solar Based in San Jose, California, Bentek Solar is a designer, integrator and manufacturer of power distribution solutions for the PV industry. The company offers a wide variety of 1,000 V–rated source-circuit and subarray combiner box solutions for commercial and utility-scale projects. In addition to basic combiners, Bentek offers prewired combiners, disconnecting combiners, smart combiners, bipolar combiners, ungrounded combiners, circuit-breaker combiners and even theft-detection combiners. Bentek combiners are available in NEMA 4 steel or NEMA 4X fiberglass enclosures with lockable exterior doors and terminals rated for both aluminum and copper conductors.
Bentek Solar / 866.505.0303 / benteksolar.com
Shoals Technologies Group Headquartered in Portland, Tennessee, Shoals is a provider of BOS solutions for the PV industry. The company offers a variety of predesigned 1,000 V–rated UL 1741 certified source-circuit combiner boxes for commercial and utility applications. Standard features include lockable, nonconductive NEMA 4X enclosures (fiberglass or metal) with finger-safe fuseholders. Optional features include dc disconnects, surge suppressors and wireless monitoring. The company’s SNAPShot Wireless Monitoring system is powered from the dc busbar and operates using a secure self-detecting and self-healing mesh network with a range in excess of 3 miles.
Shoals Technologies Group / 615.451.1400 / shoals.com
SolarBOS Located in Livermore, California, SolarBOS specializes in providing configurable combiner boxes for the PV industry. SolarBOS uses ETL to certify its combiners to UL 1741. In addition to basic 1,000 V–rated source-circuit combiners, the company offers smart-string combiners, disconnect combiners, smart-disconnect combiners and multicombiners (two electrically isolated combiners within a single enclosure). SolarBOS also offers 1,000 V–rated subarray combiners with fuses only or with fuses and a non–load-break–rated disconnect, as well as a line of fuse boxes (with or without disconnecting means) that provide overcurrent protection without combining circuits.
SolarBOS / 925.456.7744 / solarbos.com
SunLink Headquartered in San Rafael, California, SunLink manufactures roof- and ground-mount racking systems, PV combiner boxes and wire management solutions. The company offers two product lines within its HomeRun combiner box family, both of which support 1,000 Vdc designs. The original Home- Run solar combiner box is available in 2,500 standard product configurations. Options include 4–48 poles, integrated disconnect switch, NEMA 3R, 4 or 4X metal or fiberglass enclosures, and string-level monitoring. SunLink’s most recent combiner box offering is the HomeRun LTE, which adds a lower price point, more compact enclosures and a streamlined set of features to the HomeRun line. SunLink works with ETL to certify its combiner boxes to UL 1741.
SunLink / 415.925.9650 / sunlink.com
There is, of course, more to a dc collection system than PV modules, inverters and combiners. If you need 2,000 V– rated conductors for conduit or trench runs between source-circuit and subarray combiners, then traditional electrical suppliers can likely source what you need. If your needs are more esoteric or custom, then your purchasing agent is likely better off contacting companies that specialize in providing BOS components for PV power applications. For example, Bentek Solar, Eaton and Shoals can provide many of the unique 1,000 V–rated components used in high-capacity PV applications between the PV modules and inverters, including PV Wire jumpers and whips, interconnect systems, custom wire harnesses with or without in-line fuseholders, dc disconnects and so forth.
David Brearley / SolarPro magazine / Ashland, OR / solarprofessional.com
Joe Schwartz / SolarPro magazine / Ashland, OR / solarprofessional.com