The inverter not only has the function of DC to AC conversion, but also has the function of maximizing the performance of solar cells and the function of system fault protection. In summary, there are automatic operation and shutdown functions, maximum power tracking control functions, anti-solitary operation functions (for grid-connected systems), automatic voltage adjustment functions (for grid-connected systems), DC detection functions (for grid-connected systems), and DC grounding detection function (for grid-connected systems).

The following briefly introduces the automatic operation and shutdown functions and the maximum power tracking control function:

1. Automatic operation and shutdown function

After sunrise in the morning, the intensity of solar radiation increases gradually, and the output of solar cells also increases accordingly. When the output power required by the inverter is reached, the inverter starts to run automatically. After starting to run, the 10kw 3 phase off grid hybrid solar inverter will monitor the output of the solar cell components all the time, as long as the output power of the solar cell components is greater than the output power required by the inverter, the inverter will continue to run; it will stop until sunset, even on cloudy and rainy days The inverter also works. When the output of the solar cell module becomes smaller and the output of the inverter is close to 0, the inverter will form a standby state.

2. Maximum power tracking control function

The output of the solar cell module varies with the intensity of solar radiation and the temperature of the solar cell module itself. In addition, because the solar cell module has the characteristic that the voltage decreases with the increase of the current, so there is an optimal operating point that can obtain the maximum power. The intensity of solar radiation is changing, and obviously the best working point is also changing. Relative to these changes, the operating point of the solar cell module is always at the maximum power point, and the system always obtains the maximum power output from the solar cell module. This kind of control is maximum power tracking control. The biggest feature of the inverter used in the solar power generation system is that it includes the function of maximum power point tracking.

The characteristics of photovoltaic inverters are:

1. Higher efficiency. Due to the high price of solar cells at present, in order to maximize the use of solar cells and improve system efficiency, it is necessary to try to improve the efficiency of the inverter.

2. High reliability. At present, the photovoltaic power station system is mainly used in remote areas, and many power stations are unattended and maintained. This requires the inverter to have a reasonable circuit structure, strict component selection, and requires the inverter to have various protection functions, such as input DC Polarity reversal protection, AC output short-circuit protection, over-temperature and overload protection, etc.

3. The input voltage has a wide range of adaptation. Since the terminal voltage of the solar cell changes with the load and the intensity of sunlight, especially when the battery ages, the terminal voltage varies greatly. For example, for a 12V battery, the terminal voltage may vary between 10V-16V, which requires The inverter guarantees normal operation within a large DC input voltage range.

Seven major changes that photovoltaic power generation has brought us

In recent years, the government has developed and utilized renewable resources such as solar energy on a large scale, cultivating the new energy industry as a strategic leading industry for a new round of economic growth, and promoting the construction of new energy projects. So, what opportunities for wealth creation does photovoltaics bring us, and what changes will it bring us? Sunpal will take you to see it together.

wealth creation opportunity
1. Industrial and commercial photovoltaic roofs

Today, a group of qualified industrial and commercial enterprises have installed distributed photovoltaic power generation systems on their roofs. Due to the need to control smog, the country will introduce relevant policies in more cities in the future to allow the installation of photovoltaic new energy systems on the roofs of industrial and commercial facilities and public facilities.

2. Carbon trading starts
Due to the needs of environmental protection, the country may restrict carbon emissions through carbon emission taxes. At this time, clean new energy photovoltaics have become the darling. Individuals or enterprises can join the carbon trading system by installing photovoltaic power plants, and get more by selling green electricity. income.

3. Low-carbon products are more popular
When a product is labeled with a green label for electricity, similar to foods with calories marked, and all products are marked with how much electricity was used to produce the product and how much carbon dioxide is produced, people will choose similar products with less carbon emissions to promote environmental protection.

4. Rural health benefits
The popularization of distributed photovoltaics can play a very good role in environmental protection. When various facilities in rural areas can use photovoltaics, the ecological environment in rural areas will also be greatly improved.

Photovoltaic changes every aspect of life

1. Fashion and beauty become the focus
The solar power system is equipped with beautiful buildings, elegant colors, fashion, and the overall effect is beautiful and atmospheric.

2. Energy saving, environmental protection and smog reduction
Photovoltaic power generation system is a safe, green and sustainable clean energy, which not only saves energy but also reduces carbon dioxide emissions, and the effect of planting trees can be achieved by generating electricity every day.

3. Heat insulation and cooling in summer
The solar cell module absorbs a wide range of spectra and can absorb solar radiation to a large extent, thus playing a good heat insulation effect.