{"product_id":"photovoltaic-shading-testbed-for-module-level-national-renewable-energy-laboratory-nr-9781249127499","title":"Photovoltaic Shading Testbed for Module-Level Power Electronics.","description":"This document describes a repeatable test procedure that attempts to simulate shading situations, as would be experienced by typical residential rooftop photovoltaic (PV) systems. This type of shading test is particularly useful to evaluate the impact of different power conversion setups, including microinverters, DC power optimizers and string inverters, on overall system performance. The performance results are weighted based on annual estimates of shade to predict annual performance improvement. A trial run of the test procedure was conducted with a side by side comparison of a string inverter with a microinverter, both operating on identical 8kW solar arrays. Considering three different shade weighting conditions, the microinverter was found to increase production by 3.7% under light shading, 7.8% under moderate shading, and 12.3% under heavy shading, relative to the reference string inverter case. Detail is provided in this document to allow duplication of the test method at different test installations and for different power electronics devices.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eAuthor:\u003c\/b\u003e National Renewable Energy Laboratory (Nr\u003cbr\u003e\u003cb\u003eISBN-10:\u003c\/b\u003e 1249127491\u003cbr\u003e\u003cb\u003eISBN-13:\u003c\/b\u003e 9781249127499\u003cbr\u003e\u003cb\u003ePublisher:\u003c\/b\u003e Bibliogov\u003cbr\u003e\u003cb\u003eLanguage:\u003c\/b\u003e English\u003cbr\u003e\u003cb\u003ePublished:\u003c\/b\u003e 07\/20\/2012\u003cbr\u003e\u003cb\u003ePages:\u003c\/b\u003e 36\u003cbr\u003e\u003cb\u003eFormat:\u003c\/b\u003e Paperback\u003cbr\u003e\u003cb\u003eWeight:\u003c\/b\u003e 0.18lbs\u003cbr\u003e\u003cb\u003eSize:\u003c\/b\u003e 9.69h x 7.44w x 0.07d","brand":"National Renewable Energy Laboratory (Nr","offers":[{"title":"Paperback","offer_id":47611117732095,"sku":"9781249127499","price":15.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/2982\/9887\/files\/img_80a1b8ab-9028-478f-b5e6-791da99e1c2e.jpg?v=1764511842","url":"https:\/\/www.whiterainbookhouse.com\/products\/photovoltaic-shading-testbed-for-module-level-national-renewable-energy-laboratory-nr-9781249127499","provider":"WR Book House","version":"1.0","type":"link"}