“The solar energy market is still expanding and needs to be explored. The storage system is here to stay and it is essential to be prepared to take advantage of the opportunities in this market.” This is the analysis of Joaquim Fernandes, business director at Solmais.
During the podcast Solar Talk last Tuesday (6), the executive highlighted that the solar market scenario has evolved significantly in recent years. He also commented that, initially, the solar sector was limited to basic systems, but today, there is a significant change with more advanced technologies.
During the chat, Fernandes commented that one of the benefits of the battery system is the independence that this system brings.
“With the system of storage, you have the freedom to decide how you want to use your energy. For example, my priority may be to use solar energy, but if there is no sun, the priority may be the battery, and, ultimately, you can use the grid or a generator. You gain the possibility of choosing how to use your energy, which is the most important thing”, he said.
“Safety and comfort are essential. In many cases, energy storage has already been an important solution, such as for hospitals and other places where a lack of power is not an option,” he added.
The director also pointed out that the application of batteries in residential systems does not necessarily provide an immediate financial return, but rather comfort and energy security. “In the case of small producers or entrepreneurs — as we mentioned earlier with the example of the milk producer — the scenario is different,” he added.
“Esses consumidores precisam de estabilidade na rede, e, embora haja uma infraestrutura razoável, muitos ainda enfrentam dificuldades com a falta de segurança energética. Hoje, muitos pequenos negócios estão optando por sistemas de grid-zero e armazenamento de energia. Esse tipo de sistema veio para ficar”, afirmou.
Outro ponto destacado pelo diretor de Negócios da Solmais é a redução da tecnologia, que caiu cerca de 50% no último ano. “Há alguns anos, o custo de uma bateria de 5 kWh variava entre R$ 18 e R$ 22 mil. Hoje, uma bateria similar custa entre R$ 8 e R$ 10 mil, tornando o sistema muito mais ível”, comentou.
“For a home with an average consumption of 20 kWh per day, as is the case in many homes in Brazil, a 5 kWh backup system can guarantee a few hours of energy in the event of a power outage, which is a significant gain in comfort,” he explained.
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The director cited the example of the city of São Paulo (SP), which recently suffered blackouts. “Imagine a city like São Paulo, one of the largest in Latin America, where power outages happen frequently, especially in recent years. Being without power, even for a few hours, is an unpleasant experience for anyone,” he added.
Is grid-zero worth it?
O diretor afirmou que a solução de “grid-zero” surgiu para atender clientes com demandas específicas de consumo. “Por exemplo, tínhamos um cliente, como um supermercado, que possuía uma demanda contratada e não desejava aumentá-la. Para resolver isso, oferecemos a solução de grid-zero, instalando um sistema dentro da capacidade da demanda contratada, sem injeção na rede. Essa abordagem ajudou o cliente a manter o controle sobre sua demanda sem necessidade de expansão”, relatou.
“Today, the situation has changed. In many regions, grid capacity is at its limit, and the expansion of grid-connected systems faces barriers,” he added.
In an interview with Canal Solar, a TTS energia, empresa especializada no desenvolvimento de soluções em energias renováveis, compartilhou alguns cases de projetos de grid zero. Em parceria com o Grupo Jacto, a empresa realizou um projeto em Paulópolis (SP), implantando um sistema solar grid zero, que conecta o sistema à rede elétrica sem exportar energia.
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Este projeto conta com 11.350 módulos fotovoltaicos instalados em telhados e carports, além de 43 inversores, com uma potência de 5,54 MWp em CC (corrente contínua) e 4,58 MW em CA (corrente alternada ). O projeto conta com um sistema de controle DEIF, garantindo máxima performance para o cliente. Destacando-se como a maior usina em cobertura do Brasil, com uma potência total instalada de 6,40 MWp.
Outro projeto desenvolvido pela TTS Energia, em em parceria com a Flex LTD, foi um sistema em Sorocaba (SP). A planta possui uma potência instalada de cerca de 1,35 MWp, o projeto utiliza 36 inversores de 20 kW (720 kW no total) e cinco inversores de 110 kW (550 kW total), além de 2.925 módulos fotovoltaicos.
How does an interactive off-grid work?
Outro tópico levantado por Fernandes foi a aplicação de inversor off-grid interativo em sistemas fotovoltaicos. Ele explicou que essa solução interage com a rede apenas como referência, sem injetar energia nela. Ainda de acordo com ele, em caso de falta de energia, o inversor off-grid interativo pode descarregar a bateria nas cargas prioritárias de uma residência ou comércio.
“If you already have an on-grid system installed, you can install an interactive off-grid inverter in one of the phases. Most of these interactive off-grid inverters are single-phase, with 127V or 220V output,” he explained.
“You can connect it to one of these phases and, in parallel, increase the loads. You can also organize the to charge and generate energy for the different phases during the sunny period, using the battery,” he added.
When asked if it is possible to install an interactive system without a solar , Fernandes was categorical. “Yes, it is possible,” he said.
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“You can charge the battery with power from the grid. Some people also prioritize the system so that it charges the battery automatically. In addition, it is possible to use solar energy for this process, or even connect the battery for specific loads as needed,” he said.
“In addition, storage systems offer autonomy, depending on the battery capacity and charging needs. With a solar installed, autonomy is even greater, as the system can capture energy during the day to keep the batteries charged, providing even greater safety and comfort for the consumer,” he explained.
“When we add the solar , we have the possibility of guaranteeing energy until later, enhancing storage and increasing backup time. With the energy generated by the sun, the loads are directly supplied, and if a cloud es and momentarily reduces solar generation, the system automatically adjusts the flow to direct energy from the battery without relying entirely on it when the sun comes out again,” he commented.
Financing
Fernandes ainda explorou durante o Papo Solar, a importância do financiamento na concretização de projetos de energia solar, com ou sem bateria. Fernandes afirma que o mercado está maduro em relação ao financiamento bancário, e os bancos estão prontos para apoiar sistemas com baterias. “Digo isso com confiança, pois já conversei com as principais instituições financeiras do setor solar, e todas estão de acordo. Reconhecem a viabilidade do sistema, a qualidade do produto, sua garantia e durabilidade”, afirmou.
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Also during Papo Solar, Bruno Kikumoto highlighted the latest research carried out by Bloomberg, which states that the majority of residential solar energy systems installed in and Italy already contain batteries.
“This year, we had an experience with some integrators in . We ran a promotional campaign and had the opportunity to meet a German integrator who speaks Portuguese, which was incredible. At his company, 100% of the systems sold already include batteries,” added Fernandes.
O diretor de Negócios da Solmais também afirmou que no mercado alemão, sistemas sem bateria já não são mais vendidos, pois a bateria permite gerenciar o uso da energia e aproveitar horários de tarifas mais baixas na rede. Essa flexibilidade agrega valor e torna o custo das baterias mais viável. “Não vai demorar muito para que esse modelo seja comum em outros lugares. Dado o estado da rede, vamos precisar de uma pulverização de energia controlável, como a energia solar com baterias”, comentou.
“In the United States, for example, I saw VPP (Virtual Power Plant) models, where the owner of a solar system with a battery can dispatch energy to the grid at scheduled times and receive an annual remuneration of around a thousand dollars. This model is advantageous, as it allows the owner to manage his own energy and still obtain financial benefits”, he added.
“This offers impressive flexibility. With the interactive system, the can program the time to dispatch battery power, which is particularly advantageous in more developed markets such as ,” he highlighted.
Finally, Fernandes recommends investing in training and courses, learning about the installation and configuration of storage systems. “This will be essential to keep up with the evolution of the sector. With the market expanding rapidly, this is the ideal time to prepare,” he concluded.
Watch the full episode
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