Do you know what happens when you directly
connect the existing battery and DC load in
your house to solar panel?
Most of the people don't understand the importance
of a solar charge controller.
Hence, either they install a local solar charge
controller or they directly connect solar
panels to the battery.
If you connect a 12V DC load and 12V battery
to a 12V solar panel, you might think what's
the point of a solar charge controller?
A 12V solar panel can have a maximum voltage
of 17.5V or more.
If you charge your batteries with a high voltage
of solar panel, then your battery will start
to overcharge.
Due to constant overcharging, the internal
temperature of the battery will increase.
Due to this, the water in the battery starts
to dry up and after sometime, the batteries
are completely damaged.
Not just this, the 12 V DC load like DC fan,
LED bulb or DC TV that are connected to the
solar panel, due to high or low voltage, can
get damaged easily.
Now we will talk about the damage due to connecting
solar panels directly to the battery.
In the night time, the voltage of the batteries
installed in off grid system becomes more
than solar panels.
Remember voltage always flows from higher
potential to lower potential.
Therefore, in this condition the voltage from
the batteries flows in the reverse direction
to the solar panel.
Due to this the charged battery starts to
discharge.
Solar charge controller stops this reverses
flow and ensures that the voltage flows in
one direction.
This means that voltage should flow from solar
panels to the battery.
Solar charge controller protects your battery
and DC load from these problems.
A solar charge controller efficiently charges
your battery with a constant voltage and constant
current.
Due to this the battery life increases.
Along with this, DC load also runs safely.
