-
Anonymous users2024-02-07The biggest difference between off-grid solar inverter and interactive UPS is that off-grid solar inverter does not need to rely on mains power and can independently supply power to electrical equipment, while interactive UPS can only rely on mains power and provide temporary emergency power supply to electrical equipment when the mains power fails.
-
Anonymous users2024-02-06The inverter only converts direct current to alternating current alone, and does not include storing electrical energy, which is a function.
UPS is a power-off protection center and is a collection of functions. Strictly speaking, an uninterruptible power supply (or UPS, i.e., uninterruptible power supply) is a device that provides backup AC power for electrical load equipment uninterrupted in the event of power grid abnormalities (such as power outage, undervoltage, interference or surge, "also known as inrush current") to maintain the normal operation of electrical appliances.
Typically, uninterruptible power supplies are used to maintain the uninterrupted operation of critical commercial equipment or precision instruments such as computers (especially servers) or switches, preventing computer data loss, communication network disruption, or loss of control of instruments.
There is still a big difference between the two.
-
Anonymous users2024-02-05The following enterprises specializing in the production of photovoltaic inverters".Easter"Provided:
Grid-connected photovoltaic inverters are mainly divided into three categories: high-frequency transformer type, low-frequency transformer type and transformerless type, and the transformer type is mainly considered from the two levels of safety and efficiency.
The aspects that should be considered when selecting grid-connected PV inverters are:
1) Capacity matching design.
In the design of the grid-connected system, the battery array is required to match the power capacity of the connected inverter
Module nominal power Number of modules in series Number of modules in parallel = Battery array power.
In the capacity design, the maximum input power of the grid-connected inverter should be approximately equal to the power of the battery array, which has realized the maximum utilization of inverter resources.
2) The MPP voltage range matches the battery pack voltage.
According to the output characteristics of the solar cell, there is a maximum power output point of the battery module, and the grid-connected inverter has the function of automatically tracking the maximum power point within the characteristic input voltage range, so the output voltage of the battery array should be within the MPP voltage range of the inverter.
Cell module voltage Number of modules in series = battery array voltage.
The general design idea is that the nominal voltage of the battery array is approximately equal to the median value of the MPP voltage of the grid-connected inverter, so that the best effect of MPPT can be achieved.
3) The maximum input current matches the battery pack current.
The maximum output current of the battery pack array should be less than the maximum input current of the inverter. In order to reduce the DC loss from the module to the inverter, and to prevent overheating or electrical damage to the inverter caused by excessive current, the difference between the maximum input current value of the inverter and the current value of the battery array should be as large as possible.
4) Conversion efficiency.
The efficiency of grid-connected inverters is generally divided into maximum efficiency and European efficiency, and the European efficiency corrected by the weighted coefficient is more scientific. If other conditions are met, the conversion efficiency of the inverter should be as high as possible.
5) Ancillary equipment.
The grid-connected power generation system is a complete system, the inverter is an important component, and the related equipment is mainly the distribution cabinet and monitoring system. The monitoring system of grid-connected power station includes hardware and software, which needs to be tailored according to its own characteristics, and generally large inverter manufacturers have specially developed a set of monitoring system for their own inverters, so in the process of inverter selection, whether the relevant supporting equipment is complete.
Wall-mounted solar energy is still not very popular, due to the fear of high-altitude projectiles smashing glass tubes, vacuum tube heat collection area is limited and other factors, and wall-mounted solar energy is more expensive than ordinary vacuum tubes. So it's hard to promote it in Shanghai. You can choose an air energy water heater, which can generally save about 75% of the electricity bill throughout the year. >>>More
Grid-connected: PV modules pass through a grid-connected inverter. >>>More
A solar street light is a lighting device that uses solar energy to generate electricity, which converts solar energy into electricity through solar panels, and then stores it in batteries for night lighting. The distance between the solar panel and the battery is an important consideration during the design and installation of solar street lights. >>>More
The solar water heating system is a device that collects solar radiation heat to heat water through a collector, and is the most mature technology, the most economically valuable and large-scale application of equipment in the field of solar thermal energy application. Solar water heating systems have many advantages. First of all, it is environmentally friendly and energy-saving, which can reduce environmental pollution and the production of greenhouse gas carbon dioxide compared to the use of fossil fuels to produce hot water. >>>More
The difference between solar street lights and ordinary street lights is mainly reflected in the following aspects: >>>More