off grid energy storage

off grid solar battery storage

The off-grid solar photovoltaic power generation system off-grid energy storage forms a circuit inside its closed circuit system, which directly converts the received solar radiation energy into electric energy to supply the load through the solar cell bank, and stores the excess energy in the form of chemical energy in the battery after the charging controller. The grid-connected power generation system converts the received solar radiation energy into electric energy through the solar battery and then turns it into high-voltage direct current after high-frequency DC conversion. After the inverter, it outputs sinusoidal AC current with the same frequency and phase as the grid voltage to the power grid.

The scale and application form of solar photovoltaic power generation systems vary, and the scale of the system spans a large range, from 0.3 ~ 2W solar garden lamp to MW solar photovoltaic power station. Its application form is also diverse, in the household, transportation, communication, space, and many other fields can be widely used. Although photovoltaic power generation systems vary in size, their composition structure, and working principle are basically the same. The off-grid solar photovoltaic photovoltaic system consists of solar cell arrays; a Storage battery; a controller; DC/AC converter; Electric load composition.

Off-grid photovoltaic power generation system is also known as an independent photovoltaic power generation system. It can operate independently without relying on the power grid, convert light energy into electric energy, and effectively solve the problems caused by power shortages and power failures. Because the off-grid photovoltaic power generation system is not restricted by the region, it is widely used, as long as there is sunlight can be installed and used, to achieve the “light is electricity”. Off-grid photovoltaic power generation system is very suitable for remote areas without a power grid, and can also be used as emergency power generation equipment in areas with frequent power outages.

off grid energy storage systems composition

Lithium iron phosphate battery: The off-grid system mainly uses lithium iron phosphate battery. The battery capacity is determined according to different loads and different application scenarios.

Photovoltaic panel: it is the core of photovoltaic power generation, its role is to directly convert solar radiation energy into direct current energy supply load or stored it in the battery.

Photovoltaic controller: Because the general monocrystal silicon or polycrystalline silicon photovoltaic panel output for the current source type, can not be directly output to the load and battery, it needs to be converted into a stable voltage or current acceptable to the battery through the photovoltaic controller, to achieve the effective charging of the battery or supply external load. The photovoltaic controller can also realize the function of overflushing and over-discharge protection of the battery bank.

Inverter: If DC output is required, the voltage of the battery can be converted into different DC voltages through this part to adapt to different load devices. If the output is AC, it can be converted into AC 220V(single-phase) or 380V (three-phase) through DC. For family use, AC inverters are generally purchased for this part.

Monitoring system: The main function of this part is to monitor the working parameters and the working state of each part, and provide a man-machine operation interface.

Advantages of off-grid photovoltaic power generation system

The off-grid power generation system converts solar energy into electric energy under the condition of light and uses the solar energy to control the inverter to power the load and charge the battery at the same time. In the absence of light, the battery supplies power to the AC load through the inverter. It is very practical for areas without a power grid or frequent power outages.

Battery capacity of off-grid photovoltaic power generation system

The capacity of lithium iron phosphate battery is determined according to the user’s electricity consumption. In the absence of photovoltaic, the battery provides electric energy to load the system. For important loads, have enough budget and consider the continuous rainy days. For general loads such as solar street lights, select them within 2 to 3 days according to experience or need. For important loads such as communication, navigation, and hospital treatment, select them within 3 to 7 days to ensure the normal operation of the system within a few days.

off grid energy storage Application scenarios

Off-grid photovoltaic power generation systems can be applied in a wide range of fields, and can effectively solve the difficulties caused by power shortages, power failure, and high electricity charges in scenarios.

Home power supply: especially suitable for independent living families, such as urban villas, and rural families. For urban residential areas, living on the top floor of the household or private balcony larger family is also more appropriate;

School power supply: especially suitable for primary and secondary schools and kindergartens, in these places, generally during the day more electricity, and electricity consumption is not large;

Hospital power supply: it can be integrated with the hospital emergency power supply system, which can effectively improve the reliability and economy of the hospital emergency power supply;

Urban community public power supply: can be installed in the public part of the urban community, access to the community’s public power room, as the community’s public power use;

Power supply for office buildings of government departments, enterprises, and institutions: it is centrally installed on the top floor of the office buildings and connected to the low-voltage power distribution cabinet of the buildings as public power.

Remote mountainous areas, no power areas, islands, communication base stations, street lamps, and other applications. As well as RV yacht, street lamp, monitoring power generation system, photovoltaic building integration, photovoltaic water pump irrigation system, wind-wind complementary power generation, and so on.