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What is the relation between area and power of solar panels?

The power per unit area is decided by the power of solar panel itself. For example, if a 1.6x1m solar panel is made of 240W, the average power per square meter is 150W. A 220W solar panel of the same size would average only 137.5W.

As for the generating capacity per unit area, it is not only related to its own power, but also related to geographical location (illumination), installation Angle and other conditions


Household solar panel is the core part of solar power generation system, the role of solar panel is to convert the sun’s light energy into electric energy, output direct current into storage battery. Solar panel is one of the most important components in household solar power generation. Its conversion rate and service life are important factors to determine whether solar cell is useful or not. Module design: designed according to IEC:1215:1993 standard, 36 or 72 polycrystalline silicon solar cells are connected in series to form 12V and 24V modules. The module can be used in various household PHOTOVOLTAIC systems, independent photovoltaic power stations and grid-connected photovoltaic power stations, etc.

Design principles

The design of solar power supply system requires cooperation between users and professional solar technology companies. First of all, users need to provide exact usage requirements, including:

(1) Electricity voltage and power to be solved;

(2) Daily working hours, continuous rainy days guarantee time;

(3) Whether there is backup mains power supply;

(4) Regional and climatic data used in the system;

(5) If it is to supply power to the equipment, it is best to provide the name, specification or technical parameters of the equipment.

Due to the high one-time investment cost of solar power supply, the design should be based on the principle of economic and practical, as far as possible to reduce the investment, while some key components as far as possible to choose high-quality products, in order to prolong the working life of the whole system and improve the reliability of the system, reduce the failure rate.


Factors to consider in the design of domestic solar power generation:

(1) Where is domestic solar power used? Solar radiation in the area;

(2) the load power of the system;

(3) What is the output voltage of the system, DC or AC?

(4) The system needs working hours every day;

(5) How much continuous power supply the system needs in rainy weather without sunlight;

(6) load, pure resistance, capacitive or inductive, starting current size;

(7) The number of system requirements.