In the midst of modern life, where people are increasingly concerned about the environment and sustainable development, the Workshop “Green living with solar energy – Sustainable trend for the future” took place in a vibrant and energetic atmosphere. The program was accompanied by Cergy and its partners Delixi Electric, Binh An, Manh Quan Solar, Manh Ha Solar and Ledsun – pioneering enterprises in the field of renewable energy in Vietnam. Connecting space to spread green energy The workshop was held in the cool green space of Ladona Farmstay, bringing an experience close to nature, helping attendees fully feel the spirit of “green living”. Right from the check-in and product experience area, guests were able to directly admire modern solar power solutions, energy lamps, storage systems and hybrid inverters introduced by Cergy and Delixi. Comprehensive solutions for green living At the workshop, Cergy and Delixi introduced the new generation of hybrid inverter systems and smart electricity storage solutions, optimally designed for both households and businesses. These products not only help save costs but also ensure a stable and environmentally friendly power source. Along with that, Manh Quan Solar, NLMT XB and Ledsun bring many lines of solar lights and equipment with long life and outstanding efficiency – meeting the needs of use in both residential areas, industrial zones and rural areas. Cergy – Spreading sustainable values The workshop is a testament to Cergy’s spirit of cooperation and commitment in the journey with partners to develop clean energy. Through the exchanges, Cergy shares practical implementation experiences, technical instructions for installation and operation, helping customers better understand the potential and benefits of solar power. The intimate atmosphere of the exchange session at the end of the program has erased the gap between businesses and users, creating a strong bond based on trust and

The CERGY CR-6KHB 6kWh single-phase hybrid inverter provides the optimal solution for residential and commercial solar power systems with high efficiency, flexible storage capacity and outstanding safety. The product is compactly designed, durably operated and integrated with many smart features, meeting the need for stable and economical electricity use in the green energy era. Powerful Performance The CERGY CR-6KHB supports a maximum PV input of 7.8 kW with a PV-to-AC conversion efficiency of up to 97.3%, minimizing energy loss and maximizing the utilization of solar power. With a charging and discharging current of up to 135A, the inverter ensures effective energy storage and delivers a stable power supply even during peak demand or grid outages. Flexible for Any System The product is compatible with both Lithium-ion and Lead-acid batteries within a voltage range of 40–60V, and can be easily scaled with support for parallel connection of up to 9 units. It also allows integration with generators, smart loads, and AC coupling, offering flexibility for a wide range of applications from households to farms and small industrial facilities. Safety and Durability The CERGY CR-6KHB comes with an IP65 protection rating against dust and water, ensuring reliable operation both indoors and outdoors. Multiple built-in protection features include anti-reverse, overvoltage, overcurrent, short-circuit, and DC/AC surge protection. Its compact, solid all-aluminum housing design makes it easy to transport and install while maintaining long-lasting durability. Smart and Convenient Experience An intuitive color touch LCD display allows users to easily monitor and adjust system settings, while remote monitoring support ensures full system management anytime, anywhere. The advanced intelligent cooling fan system enables stable operation within a wide temperature range from -25℃ to 60℃, guaranteeing long-term performance and efficiency. Wide Applications The CERGY 1-Phase 6kWh Hybrid Inverter is suitable for a wide range of applications such as

Introduction to Cergy Energy Technology Co., Ltd Founded in 2023, Cergy Energy Technology Co., Ltd operates in the solar energy sector in Vietnam. Cergy specializes in the official import and distribution of genuine solar products, including: Solar Inverters Solar Batteries Solar Panels (PV Modules) With the business philosophy “CERGY – Customer First, Then Energy”, we place customers at the center of all activities, committed to delivering stable, high-quality, and safe green energy solutions. Vision and Mission VisionCergy aims to become a reputable, professional, and reliable solar energy company in Vietnam, contributing to the sustainable development of the renewable energy industry. MissionCergy was established to deliver value to customers, partners, and society: For customers: Access to clean, safe, reliable solar products at reasonable costs. For partners: Joint development, maximizing profits, and enhancing business reputation. For society: Contributing to sustainable growth, reducing environmental impact, and promoting the adoption of solar power. Product Portfolio Cergy Energy Technology Co., Ltd proudly brings comprehensive solar energy solutions to the Vietnamese market, meeting the diverse needs of households, businesses, and large-scale projects. APESS 580W Solar Panel The APESS 580W solar panel applies advanced photovoltaic cell technology for high efficiency and outstanding durability. Designed with IP68 waterproof and dustproof protection, the panel ensures stable performance under all weather conditions. With a lifespan of up to 25 years, the APESS 580W is an optimal choice for both residential and industrial projects. Hybrid, Ongrid, and Offgrid Inverters (Single-Phase – Three-Phase) Cergy distributes a full range of hybrid, on-grid, and off-grid inverters from single-phase to three-phase, meeting diverse customer requirements. These products feature smart integration, stable operation, and long-lasting durability. All inverters come with a 7-year official warranty, on-site technical support, and a one-to-one replacement policy in case of manufacturing defects. This is the optimal solution for residential, business, and

Why must rooftop solar systems for self-consumption be registered with EVN? As electricity costs continue to rise and the trend toward green energy grows stronger, investing in solar power systems has become a smart choice for households, businesses, and production facilities. Cergy explains why even rooftop solar systems designed for self-consumption still need to be registered with EVN. Learn the reasons, legal requirements, and insights from experts and the public. According to a new proposal from Vietnam Electricity (EVN), households and organizations that install rooftop solar systems for self-production and self-consumption but fail to register or notify the authorities may face administrative penalties.   How to calculate solar system capacity Why is registration of rooftop solar self-consumption systems required? 1. Ensuring electrical safety and fire protection Notification helps EVN and regulators collect accurate data, provide technical guidance, and monitor installations. This reduces risks such as: Reverse current into the grid, causing system failures. Local overloads, potentially leading to fires or explosions. Systems that fail to meet safety standards. 2. Load management and grid balance A few households may not significantly impact the system. However, if millions of households install without registration, the national grid could face severe fluctuations: Sunny days: reduced grid demand → excess supply. Stormy or rainy days: households rely on the grid again → power shortages. This forces the electricity sector to constantly maintain backup capacity, creating pressure on the system. 3. Data collection and energy policy planning Registration provides the government with accurate statistics, enabling: Rational allocation of renewable energy resources. Environmental management and risk reduction. Long-term policy support for solar power development. Community perspectives Many readers agree that registration is necessary but point out that current procedures remain cumbersome. According to Decree 58/2025, households installing rooftop solar systems for self-consumption must notify: Department of Industry

As electricity costs continue to rise and green energy becomes a popular trend, investing in solar power systems is a smart choice for households, businesses, and production facilities. However, to achieve optimal performance, calculating the correct system capacity is the most important factor. In this article, cergy.vn will guide you through determining the right capacity and choosing solar power equipment suitable for different needs—especially in regions with high solar potential such as Binh Thuan, Nha Trang, Dong Nai, and Tay Ninh.   1. Why is accurate calculation of solar system capacity important? Designing and installing a solar system is not simply about buying equipment and placing it on the roof. To ensure investment efficiency and long-term stability, accurate system capacity calculation is a critical step in the consulting and design process. Here’s why: Meeting actual electricity demandA properly sized system will generate enough electricity to power all household, business, or factory equipment—including high-consumption devices such as air conditioners, compressors, or production lines. Undersized systems force continued reliance on the grid, reducing investment value. Avoiding excess capacity – optimizing initial investmentOversized systems lead to unused electricity during off-peak hours. Without storage batteries or grid feed-in, this surplus is wasted, increasing costs without added economic benefits. Faster return on investment (ROI)A well-designed system, matched to real consumption and local sunlight, shortens the payback period. Typically, optimized systems pay off in 4–6 years and then operate with nearly zero running costs for 20–25 years. Ensuring stable and safe operationMismatched capacity can cause voltage overload, damaging inverters or household wiring. Undersized systems, on the other hand, cannot meet peak demand, especially in hot seasons when cooling and pumping systems work intensively. Adapting to local sunlight conditionsSolar radiation levels vary significantly across Vietnam. A 5kWp system in Binh Thuan may generate 15–20% more electricity than