The core advantages of household storage power supply: low power consumption, ultra-wide input voltage range. WEHO started its deployment in the optical storage industry ten years ago, has been deeply involved in the optical storage industry for more than ten years, and always pays attention to the development trend of the optical storage industry in the global market. With the promotion of domestic “new infrastructure” and the stimulation of overseas demand markets, the construction of the energy storage industry has been accelerated, and household energy storage is on the rise, so the improvement of technology is particularly important. In this regard, WEHO quickly responded based on a complete power supply research and development platform, and developed the DC-DC converters series of household energy storage power supplies to match the development needs of the industry. 1. Ultra-low standby power consumption requirements When the household storage device is in standby mode, the battery will continue to consume power. For civilian scenarios, the standby time is much longer than in industrial scenarios, and power consumption is the focus of users’ attention. Therefore, in order to ensure that the product consumes less power in standby mode and improve the overall battery life, it is necessary to reduce The standby power consumption of the system as a whole is the same for each device in the system. Based on the development of related products in the photovoltaic energy storage industry for many years, WEHO focused on the characteristic requirements of household storage equipment, and carried out targeted design and development of low power consumption performance for the power supply PV75-2YBxxR3, so that its quiescent current is only 1mA when inputting 500V (power consumption 0.5W), which greatly reduces the loss of battery energy in the long-term standby state. 2. Ultra-wide and ultra-high input voltage range The power of energy storage devices is relatively large. The voltage range of battery strings is ultra-wide and ultra-high, and the voltage fluctuation range is large. The primary side power supply directly draws power from the battery strings. It is necessary to convert this high voltage into usable power. , requiring the power module to have an ultra-wide and ultra-high input voltage range. When developing and designing WEHO, it seized the market gap that there was no corresponding product at that time, focused on overcoming the problem of ultra-wide and high input voltage, and created the PV series power supply dedicated to the optical storage industry for the first time. With the continuous reduction of cost and the improvement of power generation efficiency year by year, this series is also constantly optimized and upgraded. The PV75-2YBxxR3 series of household energy storage power supply has reached an ultra-wide and high input voltage range of 80-1000VDC to meet the needs of the industry. 3. 1.6 times higher transient power When there may be switching loads at the back end of household storage equipment, such as contactors, relays, etc., there will be a short-term large-scale inrush current for the power supply, and the system will exceed the power supply power for a short period of time. To prevent power supply damage or The protection function is turned off, causing system failure, requiring high transient power of the front-end power supply. Based on this market demand, WEHO conducts high transient power design by adjusting circuit layout and component selection. The whole series of power supply PV75-2YBxxR3 meets 1.6 times higher transient power, steady state power is 75W, and transient power can reach 120W (duration 3s), to meet the system requirements. 4. UL/EN/IEC certification to meet export needs With the development led by Europe and the United States, the household energy storage track ushered in rapid growth. Since 2021, driven by high electricity prices and energy security demands, global household energy storage demand has ushered in an explosion. Europe and the United States have been the main installed capacity of global household energy storage, accounting for about a quarter of the global market respectively. For domestic household storage manufacturers, whether the products meet the certification of various regions and meet the export demand has become an aspect that must be considered and paid attention to. Before product development, WEHO researches the development trend of the industry in advance, and the relevant requirements based on certification are designed to meet the product development. The power supply PV75-2YBxxR3 series complies with European and American certification standards such as UL1741, EN/IEC62109, meets the export needs of the industry, and relieves equipment manufacturers from worries. 5. High reliability, wide application, long life Household storage equipment runs for a long time, which requires high reliability and applicability of the system; in addition, the equipment is used in residents’ homes, and the photovoltaic system voltage is high, so it is necessary to ensure the safety and reliability of the system. At the same time, for users, the long life of the system is also important. Focus on the center of gravity. WEHO PV75-2YBxxR3 series of household energy storage power supplies provide a 3-year warranty, and the isolation withstand voltage is as high as 4000V, which meets the insulation impulse voltage test; the working temperature range reaches the industrial standard from -40°C to +85°C; at the same time, it has input undervoltage, Various protection functions such as anti-reverse connection protection ensure the safety and reliability of the system. summary
