The amount of electricity that a 4kW solar system can generate per day is related to the location of the solar system, which is the peak sunshine time, and also to the comprehensive coefficient of the solar system.
You only need to multiply the system size (4kW) by the peak hours of sunlight in your area and the comprehensive efficiency coefficient.
Power generation (Wh)=System size (W) * Peak hours of sunlight (h) * Comprehensive efficiency coefficient (value 75%~85%)
For example, in New York, if the area where the solar system is located has a daily peak sunshine time of 3-3.5 hours, the comprehensive coefficient of the solar system is calculated at 80%. The minimum power generation capacity of the power generation system:
4000W * 3h * 0.8=9600Wh or 9.6kWh
We need to know that the comprehensive efficiency coefficient is a correction coefficient that takes into account various factors, including but not limited to:
1) Correction coefficient for photovoltaic module type;
2) Correction coefficients for inclination and azimuth angles of photovoltaic arrays;
3) Availability of photovoltaic power generation system;
4) Light utilization rate;
5) Inverter efficiency;
6) Loss of collector lines and step-up transformers;
7) Correction coefficient for surface pollution of photovoltaic modules;
8) Correction coefficient for conversion efficiency of photovoltaic modules.
