The 3-5KW household rooftop solar grid connected power generation system is sufficient for military and civilian living in remote areas without electricity, such as plateaus, islands, pastoral areas, border checkpoints, etc., such as lighting, televisions, radio recorders, etc.
The daily sunshine time is calculated as 5 hours, and the average household electricity consumption is only 5 degrees per day. Based on 5 hours of sunshine, it requires an lkw power generation device, which is approximately 30 square meters.
Solar photovoltaic power generation requires comprehensive consideration of various factors. Only after obtaining accurate information can the installation method, minimum power, specifications (the daily effective power generation of solar panels must be greater than the load’s electricity consumption), as well as the capacity, performance, and control method of the battery be determined.
To achieve the best cost-effectiveness of the product. If the estimation of relevant factors is incorrect, it will directly affect the performance and cost of independent photovoltaic power generation systems.
(1) The geographical location of the site.
Including: location, latitude, longitude, altitude, etc.
(2) Meteorological conditions at the installation site.
Including: monthly total solar radiation, direct radiation (or percentage of sunlight), annual average temperature, longest continuous rainy days, maximum wind speed, and special meteorological conditions such as hail and snowfall.
(3) Maximum load capacity.
Including: daily working hours and average power consumption of the load, as well as the time required to work on consecutive rainy days.
(4) Load electrical characteristics
Due to the fact that the output current of the solar cell array is DC, if the load is AC, it needs to be converted by an inverter in order to operate normally.
This increases the energy loss that the solar energy ultimately supplies to the load, resulting in an increase in the required solar panels and an increase in the cost of the solar power supply system.
(5) AC load requirements for power supply
In addition to requiring larger solar panels for AC loads, the requirements for inverters also vary depending on the load. Generally speaking, loads with pure resistance properties, such as electric heating wires, do not have high requirements for inverters and can be replaced by ordinary modified wave inverters.
Television and electric motors have relatively high requirements for power supply, requiring high inverter power and output characteristics. A high-power sine wave inverter is required to ensure that the load can work normally without interference. The cost varies depending on the load requirements.
