Abstract:
Sun is an abundant source of energy and this solar energy can be harnessed successfully
using solar photovoltaic cells and photovoltaic e ect to convert solar energy into electri-
cal energy. But the conversion e ciency of a normal PV cell is low. One of the main
reason for this is that the output of PV cell is dependent directly on the light intensity
and with the position of the sun in the sky changing continuously from time to time; the
absorption e ciency of an immobile solar panel would be signi cantly less at certain time
of the day and year; for the solar photovoltaic cells are maximum productive when they
are perpendicular to the sun and less productive otherwise. So to maximize the energy
generation and improve the e ciency; solar trackers come into play. This paper presents
the design and construction of an inexpensive active solar tracking system for tracking
the movement of the sun so as to get maximum power from the solar panels as they
follow the sun. It uses Light Dependent Resistors to sense the position of the sun which
is communicated to a Arduino Uno microcontroller which then commands a set of two
servo- motors to re-orient the panel in order to stay perpendicular to the sun rays. The
design was constructed successfully and tested using Lab View to determine the improve-
ments in e ciency. Evaluation results show that the new system performs 13.4percent
better than the immobile solar PV system. Solar energy with solar tracking, will become
possible to generate more energy since the solar panel depend on sun.Light Dependent
Resistor(LDRs) are used for sunlight detection. To solve the electricity problem we uses
solar and battery to save power which provide the user the availability of electricity. Here
we are focusing on less power consumption and more performance device.
