Uncovering the beneficiaries: exploring the impact of new distributed solar energy legislation in Brazil

IF 9 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy Pub Date : 2025-05-16 DOI:10.1016/j.renene.2025.123474

Amanda Mendes Ferreira Gomes, Gustavo Xavier de Andrade Pinto, Daniel Odilio dos Santos, Andrigo Filippo Gonçalves Antoniolli, Helena Flavia Naspolini, Ricardo Rüther

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引用次数: 0

Abstract

Photovoltaic (PV) adoption within Brazil's distributed generation (DG) framework has expanded significantly following legislative milestones in 2012, 2015, and 2022, emphasizing the financial and economic effects of net metering. This study analyzes the implications of key regulations (REN 482/2012, Law No. 14,300/2022, and REN 1059/2023) by applying methodologies from the Brazilian Energy Research Company (EPE) to a 2.65 kWp rooftop PV system in southern Brazil. Analysis of 27 utilities demonstrates that consumers operating under Distributed Generation with Net Metering and Grid Compensation (GDII) achieve superior financial performance compared to Full Injection Distributed Generation (GDI) only within specific consumption bands, with advantages observed across nine utilities. Regional disparities are evident, with 66 % of favorable utilities located in the South and Southeast, driven by tariff structures and an 836 % variation in regional rates. Positive net present value (NPV) outcomes for GDII occur between 230 and 310 kWh, with the internal rate of return (IRR) window narrowing to 270–310 kWh. Moreover, higher financial returns are associated with utilities exhibiting lower operational costs, particularly where distribution system charges (TUSDg) and low-voltage maintenance fees (Wire B charges) are minimized. These findings underscore the evolving regulatory landscape's role in promoting equity, sustainability, and PV market expansion.

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发现受益者：探索巴西新的分布式太阳能立法的影响

继2012年、2015年和2022年的立法里程碑之后，巴西分布式发电（DG）框架内的光伏（PV）采用显著扩大，强调了净计量的金融和经济影响。本研究通过应用巴西能源研究公司（EPE）的方法，分析了巴西南部2.65 kWp屋顶光伏系统的关键法规（REN 482/2012，第14,300/2022号法律和REN 1059/2023号法律）的影响。对27家公用事业公司的分析表明，与完全注入分布式发电（GDI）相比，使用净计量和电网补偿（GDII）分布式发电的消费者仅在特定的消费范围内实现了卓越的财务绩效，在9家公用事业公司中都观察到了优势。地区差异很明显，66%的有利公用事业位于南部和东南部，受关税结构的影响，地区费率差异为836%。GDII的正净现值（NPV）结果在230 - 310千瓦时之间，内部收益率（IRR）窗口缩小到270-310千瓦时。此外，较高的财务回报与公用事业公司表现出较低的运营成本有关，特别是在配电系统费用（TUSDg）和低压维护费用（B线费用）最小化的情况下。这些发现强调了不断变化的监管环境在促进公平、可持续性和光伏市场扩张方面的作用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Renewable Energy 工程技术-能源与燃料

CiteScore

18.40

自引率

9.20%

发文量

1955

审稿时长

6.6 months

期刊介绍： Renewable Energy journal is dedicated to advancing knowledge and disseminating insights on various topics and technologies within renewable energy systems and components. Our mission is to support researchers, engineers, economists, manufacturers, NGOs, associations, and societies in staying updated on new developments in their respective fields and applying alternative energy solutions to current practices. As an international, multidisciplinary journal in renewable energy engineering and research, we strive to be a premier peer-reviewed platform and a trusted source of original research and reviews in the field of renewable energy. Join us in our endeavor to drive innovation and progress in sustainable energy solutions.