how to make a homemade solar panel thisis the first in three videos of a solar diy project everything you should knowto build a 100 watt solar panel at home in order to charge a 12-volt batterywith solar energy a solar panel with 18 volts is required so to build a solarpanel capable of charging a 12-volt battery you will need 2 millimeters oftabbing wire and another of 5
Tesla Solar Panel, millimeters solder wire is a must have aflux pen strapping tape also known as short tape regular tape a solder armbetween 60 and 80 watts and multimeter one that conveyor of both voltage andcurrent silicon paste preferably crystalline with uv protection epoxyresin the best and easie way to do it
yourself to encapsulate the back of asolar panel this epoxy resins have excellent adhesion to glass and acrylicplastic and ethoxy hardener here the measure is two to one ratio and ofcourse last but not least the solar cells here is up to you you can purchasepreet absolu cells they have tabbing wire already attached it will cost a bitmore but will saves you a lot of time and work in video description below youfind links to everything you need to start building your solar panel let'sget started the first set we have to take is to measure the length of thetabbing wire between two cells grab two cells and join them close to each otherlike this two or three millimeters
between them is enough with one cellface up is the negative side and face down is the positive side measure thelength of the tab wire along both cells the job here now is to measure and cutthe tabbing wire for all 36 cells for your solar panelto make this task less tedious cut the tabbing wire to one row of nine cells ata time and after that you can start cell during the tabbing wire on the negativeside of each cell to do this first pass along each conduct line theflux pen this will prevent beading of the solder arum and also helps the cellto flow cleanly position the tab wire on the cell and start soldiering from topto bottom in a continuous movement
soldiering is not so hard you get itright very fast but get prepared for a couple hours of work so this type of 6x6polycrystalline cells usually has three connecting bus lines we have to weld 36cells on the negative side first where next it must be welded on the positiveside that is the back of each cell creating a string of 18 volts the neededcurrent to charge a 12 volt battery one of the best and strongest materials touse in a solar panel is tempered glass three millimeters are more than enoughfor strength and durability being also the ideal surface to start cell duringyour solar cells start by giving a good cleaning
now with a clean surface we can startput things together but first let's again see how a solar panel works thefirst cell in this row is the negative side of the solar panel that will bewelded to the negative bass wire becaming this way the negative pole ofthe solar panel and continuing with the next three strings of cells all weldedtogether from front to back of each other making this way a total of 36cells of 18 volts another thing to note is that solarcells are very fragile for this reason and almost guarantee you will break oneor more cells even if it is a very small crack you can use regular tape andrepair it easily now that you know how a
solar panel works it's time to connectall cells together to make this task much easier here are some tips you canuse to do this correctly it is convenient to use a type offtweezers or even a way to hold the wire in the correct place to weld here i amusing a scissor which works very well another useful tip is to use normal tapeto hold the cells in place in this way they remain aligned helping you to weldmore easily and quickly and if the tabing wire is a bit long simply cut offthe loose ends when you finish the job now with all cells tab together it'stime to clean again the glass surface now with the glass clean it's time toposition and secure the cells in place
by measuring the string of cells closestto the edge of the glass we find the margin on all sides of the panel thenwith all cells in place we need to keep each string of cells tightly attached tothe glass first with normal tape and next with short tape now pass the short eight from top tobottom between each string of cells and at the same time it is convenient todouble check for any broken cells even if there is a slight crack the causeaffair is the encapsulation will pass through it and the epoxy resin willeventually yellow over time now with all cells secure in place let'sproceed by cell during the string of
cells into the bus wire start by cuttinga five millimeter wide tabbing wire to the width size of the two middle cellstrings and secure the bus wire with regular tape cut the loose ends of the cell tabbingwire and you're ready to solder the two middle rows together here i will weldthe tab wire from the positive side of the cell to the bass wire which willthen weld to the negative side of next string of cells easic as you will seeright away now is to do the same for the other two row of cells on the top of thepanel and then it ends with this two bus wires which show the positive and thenegative poles
and after this with a string of 36 cellsconnected to the positive and negative bass wire we have to test if we have apromising solar panel with the panel facing the sun measure the voltage witha multimeter and make sure that it produces at least more than 18 voltshere i tested on a spring morning keep in mind that solar panels always losetension in the hottest hours depending your region you should get about 18point six volts during the peak sun hours now back to the office we going toproceed by soldering two copper wires to the poles of the panel here you canchoose to use the 5 millimeter bass wire 2 also to be connected to the junctionbox in the bottom middle of the panel
did i choose a pair of copper wires doesthe same job and i am not using a bypass diode because i will use a pwm chargecontroller which protects the solar panel and the battery from reversecurrent and overcharging respectfully among other useful features watch thenext video where we continue with this extraordinaire solar panel see you there you
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