Trivia about solar panels

How much power does a solar panel generate in a day?

The maximum output (W), which indicates the amount of power generated by a solar panel, is the number that generates the most power under certain conditions. Under actual usage conditions, it does not produce maximum output all day long. In the morning and evening, cloudy days, and rainy days, the amount of power generated will decrease. Therefore, we will design the system with the expectation that the maximum output can be produced for about 3.5 hours with noon in between.

How much power can be generated in one day on a sunny day? In the case of " BSM415PM5-60SB " with a maximum panel output of 415W (without considering system loss etc.) 415w x 3.5 hours (h) ≒ 1,452Wh * The amount of power generated by the solar panel changes depending on the season, weather, installation direction and angle.

Relationship between voltage and current of multiple connected solar panels

■ Relationship between voltage and current when solar panels are connected in parallel

When solar panels of the same standard are connected in parallel,
" Voltage does not change "
"The current increases in proportion to the number of solar panels "
becomes.

" 18V solar panel ⇒ 12V battery "
" 36V solar panel ⇒ 24V battery "
It is used when you do not want to change the voltage on the panel side when charging to .

However, the current will increase in proportion to increasing the number of solar panels of the same standard.
Even if the voltage is low, if the current is high, there is a risk of fire, so be careful.
Consider using a cable suitable for the current to reduce the risk of heat generation and fire.

■ Relationship between voltage and current when solar panels are connected in series

When solar panels of the same standard are connected in series,
"The current does not change "
"The voltage increases in proportion to the number of solar panels "
becomes.

It is used to create the desired voltage, such as when trying to charge a 24V or 36V battery using a "18V" solar panel.

However, the voltage will increase in proportion to increasing the number of solar panels of the same standard.
If the voltage is high, the risk of electric shock increases, so be careful.