Buy a variety of different ranges for different panels and battery charging control for different battery
Solar Charge Controller Buy in many model
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A PWM solar charge controller stands for “Pulse Width Modulation”. These operate by making a connection directly
from the solar array to the battery bank. During bulk charging, when there is a continuous connection from the array
to the battery bank, the array output voltage is ‘pulled down’ to the battery voltage. As the battery charges,
the voltage of the battery rises, so the voltage output of the solar panel rises as well,
using more of the solar power as it charges. As a result, you need to make sure you match the nominal voltage of the solar array
with the voltage of the battery bank. *Note that when we refer to a 12V solar panel, that means a panel that is designed to work with a 12V battery.
The actual voltage of a 12V solar panel, when connected to a load, is close to 18 Vmp (Volts at maximum power).
This is because a higher voltage source is required to charge a battery. If the battery and solar panel both started at the same voltage,
the battery would not charge.
A 12V solar panel can charge a 12V battery. A 24V solar panel or solar array (two 12V panels wired in series)
is needed for a 24V battery bank, and 48V array is needed for 48V bank. If you try to charge a 12V battery with a 24V solar panel,
you will be throwing over half of the panel’s power away. If you try to charge a 24V battery bank with a 12V solar panel, you will be throwing away 100% of the panel’s potential, and may actually drain the battery as well.
A charge controller, or charge regulator is basically a voltage and/or current regulator to keep batteries from overcharging.
It regulates the voltage and current coming from the solar panels going to the battery. Most “12 volt” panels put out about 16 to 20 volts,
so if there is no regulation the batteries will be damaged from overcharging. Most batteries need around 14 to 14.5 volts to get fully charged.
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