Picture of How to Solder Solar Cells Together
As the title says this instructable demonstrates how to solder individual solar cells together in preparation for building a solar panel. 

First i need to give a few disclaimers:

1. Soldering irons are hot and will burn you if you are not careful. If you do not know how to solder you will need to learn how to first before attempting this project.  
2. You need to have and understanding of basic electricity before attempting to work with solar panels. If you do not have this understanding have some one help you that does.
3. Tab wire and solar cells have sharp edges, they can cut you, be careful. 

Now that the warnings are out of the way lets look at the items you will need.  In the 2 pictures the items have a description of what each item is, but hear is also a list:

1.Soldering iron
2. Soldering iron stand
3. 3mm tabbing wire- pre solder coated
4. 5mm tabbing wire- pre solder coated
5. scissors 
6. ruler
7. holding tool
8. solder pen
9. solder paste- only used to tin the solder iron
10. solder wire- only used to tin the solder iron
11. solar cells
12. electrical tape - not pictured

I have seen various tutorials online about soldering solar cells, but this was well written and easy to follow!


is it possible to solder the tab and the solar cells with a smd hot air gun?

jjaan1 year ago


drcad2 years ago
Nice Kale,
I am quite happy that you are the first that has given a good explanation why get to 36 cells. I have readed lots of smoke on 32 to 40 cells grids arrangements, with comments of heating circuits.
Since you are in the Electronic community, have you experimented underload that your circuit would be more efficient with a 38 cells. i.e. 38 cells = 18v x 63% eff. will give a clean 11.9V underload (multimeter reading will boost this value by 37%).

Enjoy your testings, I am up to making a wave generator instead of purchasing one ($$$$), I will post my gadget when completed.

skoster2 years ago
where can I get quality solar cells? plz reply.
kalefranklin (author)  skoster2 years ago
i get all of mine off ebay, its the only place i know that i can get parts at a reasonable price. the only problem is it takes a few weeks to get them because they come from china.
do you have any ebay site links that I could browse for prices? I'm not sure what to search for? 1x6 solar cells unbroken?
kalefranklin (author)  skoster2 years ago
I just type in "solar cells" and start looking at what is available. do some price comparing. i always buy untabbed cells because they are cheaper, but sometimes there are cells that are short tabbed or full tabbed available. those will save you soldering time, if they were soldered correctly from the person you are getting them from.
pfred22 years ago
Do you have any pictures of your second jig being used? The milled slot piece of black iron pipe chucked into a drill. I don't think I am quite following what you are doing with just the text description.

I have a whole bunch of solar cells out of dead garden path lights that I am thinking about trying to make a panel out of.
kalefranklin (author)  pfred22 years ago
i added several new pictures, i hope this makes it much more clear how to use the pipe jig that i was showing/ talking about.

if you are going to use the garden path light cells you will not be using them the same way i have shown in this instructable. my recommendation for these cells that are already encapsulated is to take them out on a good sunny day and get the voltage reading from each one. then you need to wire in series to the point of about 18 volts (on a multimeter) for a 12 volt system. it would take several (possibly 100's) of those small cells to make a decent amount of power, but it will produce some power. i have a few of these also that i was playing with last summer.
Thanks for the extra photos. They help a lot making sense of the text for me. I'm curious if you couldn't use a plain piece of pipe and just cut along the top with a straight edge and a razor blade? Sure it would be tough on the blade edge, but sometimes you have to do what you can do. Might help to paste a strip of paper or gray cardboard up there or something? Not everyone has a milling machine they can slot pipe with. I mean I do, but I realize most don't.

The electronics in those garden lights must be pretty good because they can sort of charge up 1.5 volt AA batteries. Otherwise a dozen would get 18 volts. I guess I'm just going to have to walk through lots of folks yards at night to gather up that many! ha ha just kidding.