{"id":14016,"date":"2013-07-08T17:49:06","date_gmt":"2013-07-08T14:49:06","guid":{"rendered":"https:\/\/add-energy.ro\/what-are-the-advantages-of-ac-solar-pv\/"},"modified":"2013-07-08T17:49:06","modified_gmt":"2013-07-08T14:49:06","slug":"what-are-the-advantages-of-ac-solar-pv","status":"publish","type":"post","link":"https:\/\/add-energy.ro\/en\/what-are-the-advantages-of-ac-solar-pv\/","title":{"rendered":"What Are The Advantages Of AC Solar PV ?"},"content":{"rendered":"

\n\t\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Microinverters all but disappeared from the market in the early 2000s, due to their high cost and relatively low efficiency. But over the last five years, rapid advances in semiconductor technology and improvements in efficiency and reliability have made microinverters a viable alternative to central inverters. Today, ACPV systems account for more than 30% of all residential and small commercial (<100kW) installations in the U.S., according to IMS. And their share is expected to continue to grow.<\/span>\n<\/p>\n

\n\t\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 In fact, many industry analysts agree that in the next five to ten years all solar panels will include some form of distributed electronics. These could include DC to DC optimizers, detached microinverters and a new category of AC modules with integrated microinverters.<\/span>\n<\/p>\n

\n\t\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Advantages of ACPV<\/p>\n

\t\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Manufacturers say the advantages of solar microinverters include a simplified design, installation, and most compellingly, improved uptime over other systems as there is no single point of failure in the PV system. System owners easily comprehend the bottom-line benefits of module-level monitoring and maximum power point tracking. It\u2019s actually hard to understand how the rooftop PV industry has grown to the point it is today without system owners having regular awareness of how their own systems are performing.<\/span>\n<\/p>\n

\n\t\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Microinverter monitoring systems help operators keep tabs on an entire portfolio of systems at the module\u2014rather than the system\u2014level. No more time-consuming truck rolls to diagnose a non-functioning array; module-level monitoring pinpoints the performance of every solar microinverter and module. Consumer views of monitoring systems provide PV owners peace of mind that their system is running properly. When presented as part of a module company or installer\u2019s offering, monitoring systems are a nice added value service.<\/span>\n<\/p>\n

\n\t\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Detached Micros vs. AC Module Systems<\/p>\n

\t\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 The category of \u201cACPV systems\u201d includes both detached microinverters and integrated AC modules, reflecting the two ways these systems are wired together in the field:<\/span>\n<\/p>\n

\n\t\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u2022 Detached microinverter systems: Individual solar microinverters and PV modules are installed as a pair (making a DC connection in the field), both units typically within a foot of each other. The assembly is then wired in parallel with other\u00a0assemblies creating an AC branch circuit.<\/p>\n

\t\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u2022 AC module systems: Microinverters are factory-installed onto PV modules and the integrated units are brought to the field as a certified assembly. AC modules are wired in parallel to other AC modules, creating an AC branch circuit.<\/span>\n<\/p>\n

\n\t\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 It\u2019s important for installers to understand the regulatory and practical differences between these two systems. The NFPA 70 National Electrical Code (NEC) defines an AC module as a complete, environmentally protected unit consisting of solar cells, an inverter and other components, exclusive of a tracking system, designed to produce AC power from the sunlight. AC modules must be evaluated by a Nationally Recognized Testing Laboratory (NRTL) using both UL 1741 and UL 1703. Detached solar microinverters are tested to UL 1741, but not UL 1703.<\/span>\n<\/p>\n

\n\t\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u201cCombinations of PV modules and microinverters combined\/assembled in the field or at the dealer or distributor do not meet the intent, definition or requirements associated with true ACPV modules as defined in 690.2 and in 690.6,\u201d wrote John Wiles in his article, \u201cMicroinverters and ACPV Modules are Different Beasts\u201d (IAEI News, May\/June 2012).<\/span>\n<\/p>\n

\n\t\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 There are also differences in the way AC modules are installed vs. detached microinverters. For example, AC modules do not require a separate equipment grounding conductor (EGC) run to the inverter or the frame of the module, because the frame is grounded to the microinverter chassis and bonded to the integrated EGC within the interconnecting cable system. The entire EGC path (including the grounding between inverter and PV module) is evaluated as part of the listing certification by the NRTL.<\/span>\n<\/p>\n

\n\t\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 For more details on the differences between detached microinverters and AC modules, installers and inspectors should consult NEC Article 690, Section 690.6. In addition, SolarTech has published the\u00a0Microinverter and ACPV Module Application Guide.\u00a0To download a copy or provide feedback, visit\u00a0www.solartech.org<\/a>.<\/span>\n<\/p>\n

\n\t\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 By: Nancy Edwards, Marketing Director at SolarBridge Technologies<\/a><\/span>\n<\/p>\n

\n\t\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 source:\u00a0 http:\/\/www.solarpowerworldonline.com<\/span>\n<\/p>\n

\n\t\u00a0\n<\/p>\n

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\n\tFor other informations click to \"Contact-Us\"<\/a><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Microinverters all but disappeared from the market in the early 2000s, due to their high cost and relatively low efficiency. But over the last five years, rapid advances in semiconductor technology and improvements in efficiency and reliability have made microinverters a viable alternative to central inverters. Today, ACPV systems account for more than 30% … Read more<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[33,349,250,31,91,282],"tags":[],"class_list":["post-14016","post","type-post","status-publish","format-standard","hentry","category-informatii-din-presa-internationala","category-international-press","category-news","category-stiri-utile-noutati","category-tipuri-de-energie-regenerabila-solara-termica-fotovoltaica","category-types-of-renewable-energy-solar-thermal-photovoltaic"],"_links":{"self":[{"href":"https:\/\/add-energy.ro\/en\/wp-json\/wp\/v2\/posts\/14016","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/add-energy.ro\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/add-energy.ro\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/add-energy.ro\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/add-energy.ro\/en\/wp-json\/wp\/v2\/comments?post=14016"}],"version-history":[{"count":0,"href":"https:\/\/add-energy.ro\/en\/wp-json\/wp\/v2\/posts\/14016\/revisions"}],"wp:attachment":[{"href":"https:\/\/add-energy.ro\/en\/wp-json\/wp\/v2\/media?parent=14016"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/add-energy.ro\/en\/wp-json\/wp\/v2\/categories?post=14016"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/add-energy.ro\/en\/wp-json\/wp\/v2\/tags?post=14016"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}