DIY 100W Solar Panel: How to Make Homemade Solar Panels from Scratch – Part 1

how to make a homemade solar panel this
is the first in three videos of a solar DIY project everything you should know
to build a 100 watt solar panel at home in order to charge a 12-volt battery
with solar energy a solar panel with 18 volts is required so to build a solar
panel capable of charging a 12-volt battery you will need 2 millimeters of
tabbing wire and another of 5 millimeters solder wire is a must have a
flux pen strapping tape also known as short tape regular tape a solder arm
between 60 and 80 watts and multimeter one that conveyor of both voltage and
current silicon paste preferably crystalline with UV protection epoxy
resin the best and easie way to do it yourself to encapsulate the back of a
solar panel this epoxy resins have excellent adhesion to glass and acrylic
plastic and ethoxy hardener here the measure is two to one ratio and of
course last but not least the solar cells here is up to you you can purchase
preet absolu cells they have tabbing wire already attached it will cost a bit
more but will saves you a lot of time and work in video description below you
find links to everything you need to start building your solar panel let's
get started the first set we have to take is to measure the length of the
tabbing wire between two cells grab two cells and join them close to each other
like this two or three millimeters between them is enough with one cell
face up is the negative side and face down is the positive side measure the
length of the tab wire along both cells the job here now is to measure and cut
the tabbing wire for all 36 cells for your solar panel
to make this task less tedious cut the tabbing wire to one row of nine cells at
a time and after that you can start cell during the tabbing wire on the negative
side of each cell to do this first pass along each conduct line the
flux pen this will prevent beading of the solder Arum and also helps the cell
to flow cleanly position the tab wire on the cell and start soldiering from top
to bottom in a continuous movement soldiering is not so hard you get it
right very fast but get prepared for a couple hours of work so this type of 6×6
polycrystalline cells usually has three connecting bus lines we have to weld 36
cells on the negative side first where next it must be welded on the positive
side that is the back of each cell creating a string of 18 volts the needed
current to charge a 12 volt battery one of the best and strongest materials to
use in a solar panel is tempered glass three millimeters are more than enough
for strength and durability being also the ideal surface to start cell during
your solar cells start by giving a good cleaning now with a clean surface we can start
put things together but first let's again see how a solar panel works the
first cell in this row is the negative side of the solar panel that will be
welded to the negative bass wire becaming this way the negative pole of
the solar panel and continuing with the next three strings of cells all welded
together from front to back of each other making this way a total of 36
cells of 18 volts another thing to note is that solar
cells are very fragile for this reason and almost guarantee you will break one
or more cells even if it is a very small crack you can use regular tape and
repair it easily now that you know how a solar panel works it's time to connect
all cells together to make this task much easier here are some tips you can
use to do this correctly it is convenient to use a type off
tweezers or even a way to hold the wire in the correct place to weld Here I am
using a scissor which works very well another useful tip is to use normal tape
to hold the cells in place in this way they remain aligned helping you to weld
more easily and quickly and if the tabing wire is a bit long simply cut off
the loose ends when you finish the job now with all cells tab together it's
time to clean again the glass surface now with the glass clean it's time to
position and secure the cells in place by measuring the string of cells closest
to the edge of the glass we find the margin on all sides of the panel then
with all cells in place we need to keep each string of cells tightly attached to
the glass first with normal tape and next with short tape now pass the short eight from top to
bottom between each string of cells and at the same time it is convenient to
double check for any broken cells even if there is a slight crack the cause
affair is the encapsulation will pass through it and the epoxy resin will
eventually yellow over time now with all cells secure in place let's
proceed by cell during the string of cells into the bus wire start by cutting
a five millimeter wide tabbing wire to the width size of the two middle cell
strings and secure the bus wire with regular tape cut the loose ends of the cell tabbing
wire and you're ready to solder the two middle rows together here I will weld
the tab wire from the positive side of the cell to the bass wire which will
then weld to the negative side of next string of cells eASIC as you will see
right away now is to do the same for the other two row of cells on the top of the
panel and then it ends with this two bus wires which show the positive and the
negative poles and after this with a string of 36 cells
connected to the positive and negative bass wire we have to test if we have a
promising solar panel with the panel facing the Sun measure the voltage with
a multimeter and make sure that it produces at least more than 18 volts
here I tested on a spring morning keep in mind that solar panels always lose
tension in the hottest hours depending your region you should get about 18
point six volts during the peak Sun hours now back to the office we going to
proceed by soldering two copper wires to the poles of the panel here you can
choose to use the 5 millimeter bass wire 2 also to be connected to the junction
box in the bottom middle of the panel did I choose a pair of copper wires does
the same job and I am not using a bypass diode because I will use a PWM charge
controller which protects the solar panel and the battery from reverse
current and overcharging respectfully among other useful features watch the
next video where we continue with this extraordinaire solar panel see you there you

You May Also Like