small size mono black solar panels 20w30w35w45w all good quality for on-grid or off-grid solar power system can be used for residential or business application on roof or ground.

Drawing
The dimensions of mono solar panels 20w-45w are very close because they are all composed of cut cells. Mono 20w-35w all have a width at 350mm. The increase of the cell’s size as well as the panel’s length (from 410mm to 645mm), lead to the improvement of wattage (from 20w to 45w). There are four mounting holes(7*11mm) at the back of the solar panels.

Small size solar panels are also called customized solar panels which means they are higly customizable, you decide how the solar panels will be as following:

1: Types of solar cells: mono or poly;
2: Number of cells: 1/2 cutted, 1/3 cutted, 1/4 cutted;
3: TPT backsheet: white, black or other;
4: EVA film: white or color;
5: Frame: the length, the width, the thickness, the color;
6: Juction box: IP level(65-68), brand;
7: Cable: the length(null-1meter), the width;
8: Connectors: MC4, anderson, clips;

Benefits:
1: small size solar panels are also called customized solar panels which means the dimensions, the color, the cell’s size, the voltage and almost everything are customizable.
2: when speaking of size and voltage, small size solar panels are more suitable and convenient for residential off-grid solar power system, for example, 5-10v solar light system for garden.
3: Because of the small size, the maintenance (when there is snow or dirt) as well as the installation work of small solar panels are much more easier than large panels.