Batteries are already competitive for consumer energy storage in behind-the-meter applications in several Brazilian states. Marcio Takata, the director of consulting company Greener, Marcio Takata, described this market opportunity during the Greener Business Summit earlier this month in Sao Paulo, Contact online >>
Batteries are already competitive for consumer energy storage in behind-the-meter applications in several Brazilian states. Marcio Takata, the director of consulting company Greener, Marcio Takata, described this market opportunity during the Greener Business Summit earlier this month in Sao Paulo, Brazil.
He presented a case study involving an industrial consumer in the area of Cosern, in the state of Rio Grande do Norte. The difference between the tariff at peak hours and the off-peak tariff is BRL 3.004 ($0.55)/MWh.
According to Greener, such consumers could reduce their annual bills from approximately BRL 273,600 to BRL 173,600. They would achieve 36% savings on the energy tariff by installing a lithium-ion battery with a capacity of 0.6 MW/2.5 MWh.
In the simulation, the consumer would have a reduction of BRL 123,800 in the peak tariff, from BRL 173,400 to BRL 49,600, and an increase of BRL 21,800 in the off-peak tariff, from BRL 103,200 to BRL 124,000. The net savings with storage would therefore be BRL 102,000.
The investment, for a useful life of 15 years, was estimated at BRL 11 million, with an operating cost of BRL 55,000 per year. There is a need for reinvestment in the tenth year of the asset, consisting of 15% of capex, or BRL 1.65 million. The tariff adjustment for the period was 6% per year.
The difference between peak and off-peak tariffs is crucial to the viability of battery storage to manage the load. According to the Greener survey, this difference can range from BRL 354/MWh in the CEA concession area, in the state of Amapá, to BRL 3,971/MWh, in the Equatorial concession area, in the state of Pará. In addition to the distributors in Pará and Rio Grande do Norte, other distributors such as Coelba (BA), Enel RJ and EMS (MS) have peak and off-peak rates with differences above BRL 3,000/MWh.
Battery storage is seen as a way to diversify for companies that already operate in the solar sector. Sao Paulo-based Brasol, for example, is expected to invest in its first storage projects this year.
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O uso de baterias para armazenamento de energia já é competitivo para consumidores em aplicações atrás do medidor, na arbitragem de energia. A oportunidade de mercado foi demonstrada pelo diretor da empresa de inteligência de mercado e consultoria Greener, Marcio Takata, durante o Greener Business Summit, realizado na última semana na Amcham SP.
O estudo de caso apresentado considerou um consumidor do grupo A na área de concessão da Cosern, no Rio Grande do Norte, onde a diferença entre a tarifa no horário de ponta (geralmente de 18h às 20h) e a tarifa fora da ponta é R$ 3.004/MWh.
Esse consumidor poderia reduzir a conta de R$ 273,6 mil para R$ 173,6 mil, uma economia de 36% na tarifa de energia, instalando um sistema de armazenamento em baterias de lítio de 0,6 MW (2,5 MWh).
Na simulação, com o deslocamento de carga, o consumidor teria uma redução de R$ 123,8 mil na tarifa de ponta – de R$ 173,4 mil para R$ 49,6 mil – e um aumento de R$ 21,8 mil na tarifa fora de ponta – de R$ 103,2 mil para R$ 124 mil. A economia líquida com o armazenamento seria, portanto, de R$ 102 mil.
O investimento, para uma vida útil de 15 anos, foi estimado em R$ 11 milhões, com custo de operação de R$ 55 mil ao ano e uma necessidade de reinvestimento, no décimo ano do ativo, de 15% do capex ou R$ 1,65 milhão. O reajuste tarifário considerado para o período foi de 6% ao ano.
A diferença entre a tarifa de ponta e fora de ponta é crucial para a viabilidade do armazenamento em baterias para gerenciar a carga. De acordo com o levantamento da Greener, essa diferença pode variar de R$ 354/MWh, na área de concessão da CEA (Amapá), a R$ 3.971/MWh, na área de concessão da Equatorial, no Pará.
Além das distribuidoras do Pará e do Rio Grande do Norte, as distribuidoras também Coelba (BA), Enel RJ e EMS (MS) têm tarifas ponta e fora ponta com diferenças acima de R$ 3.000/MWh.
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