Picture of Solar charger
In this step-by-step guide i'm about to teach you how to design and build a simple solar charger.

What you'll need:

1) Solar panel.
2) Adjustable Boost Converter Charger Module.
3) Electrical Wires.
4) USB female cable.
5) A box.
6) Recommended  - portable USB charger, a cord, led. 
7) Soldering Tin.
8) Duct tape.


1) Plier.
2) Soldering iron.
3) Hot glue gun.
4) A knife.
5) Tweezers.
6) Voltmeter.
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Step 1: Attaching wires to the panel

Picture of Attaching wires to the panel
Solder electrical wires to the solar panel (Red to +, black to -).
Cover it with the duct tape. 

Step 2: Adjusting

Picture of Adjusting
Connect a power source to the charger module and a voltmeter to the output of it. Now adjust the module to 5v output.
connect the panel to the module (to the input).

Step 3: Connecting USB

Picture of Connecting USB
Cut the USB cable and then solder the + cable to the + output in the module and the - cable to the - output. 

Step 4:

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Mark on the top of the box the size of the solar panel.
Cut near the borders that you've marked so the hole is a bit smaller than the panel.

Step 5:

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Use hot glue to glue the panel to the hole.
Now glue the other parts to the bottom of the box so they wont move, in the side make a hole as big as the USB cable.

* I recommend gluing the USB output well so sand and dirt wont come in.

**If you had cotton wool in the box i recommend putting it between the panel and the bottom it will also help preventing the parts moving.

Step 6: Finished!!

Picture of Finished!!
Now you can test your charger.
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jsf8412 days ago
Okay, so come to find out, one of my connections was loose, and is now properly soldered. Now, when outside and taking measurements, the output voltage is almost exactly that of the input voltage. When adjusting the potentiometer, it appears as though it will never reach the 5V on the output terminals. I will here a clicking noise signaling it cannot increase the resistance any longer. Should i just put a small rated resistor across the output of it to try and bring the voltage down? Any other suggestions? Thanks
jsf84 made it!13 days ago
When adjusting the boost converter, i could only get 5V DC output when the power source was between 2.6V and 5.2V. Outside, the voltmeter reads about 9V DC while in the sun and readings taken off the input side. However, the output side going to the female USB port reads in the low millivolts while out in the sun. From this point, how do i get the proper 5V output so i can charge cellular phones with 9V sun supply when the booster only increases voltage? Thanks
jsf84 made it!13 days ago
When i was testing the boost adjuster coverter using a power supply, i could only get the output of the piece to be 5VDC with the voltages of the power source being between 2.6V and 5.2V. The suns rays bring the input voltage on the boost adjuster to be around 9V DC. This brings my output voltage to the millivolt range, what should i do to get the proper 5V DC output when out in the sun? Thanks
DragonWOF22 days ago

How much does this cost?

crashzoom (author)  DragonWOF22 days ago
this was a long time ago but it was pretty cheap.. I think the panel costs a few dollars.
DeezzNutts1 month ago
Did u made a video on YouTube or somthing ..
crashzoom (author)  DeezzNutts1 month ago
Not yet but I'm now making videos for the instructables I can.

its because i need all the help i can get :)

crashzoom (author)  DeezzNutts1 month ago
You can ask anything you want

Thank u so much i was wondering is there any stores that sale charger module cause i am doing this solar power charger for a science fair project and i have everything that i need besides that and i need it by Friday :\

crashzoom (author)  DeezzNutts1 month ago
You're welcome, I think.. search for arduino stores, electronic stores might have it but arduino ones are your best chance I think.

thank you :) i was wondering do u have kik or something ?cause i found the part but i well be needing help and i hardly get on here

crashzoom (author)  DeezzNutts1 month ago
What Is kik?
Its Like facebook
crashzoom (author)  DeezzNutts1 month ago
nope, but I have Facebook
Add me Arely Montesinos
I have an alice in wonderland cover photo
crashzoom (author)  DeezzNutts1 month ago
crashzoom (author)  DeezzNutts1 month ago
And good luck with the fair.
crashzoom (author)  ilyas.ouchane83 months ago
On ebay, deal extreme or arduino stores maybe
ragyarko made it!3 months ago
it.really good
gridarmorfix12 months ago
I would recommend using a dc to dc step up module eBay item number 321333677611 this will allow smartphone charging. because the solar panel is only a few hundred milliamps I would also recommend charging the phone in the off state as your phone may not charge at all if it's on. my phone pulls .94 amps while charging, that's 940 milliamps.
crashzoom (author)  gridarmorfix5 months ago
Tnx great advice
Mr_Rep10 months ago

so i have a 4 AA battery holder, and a 7.2V NiMh RC heli battery. which would be more feffective with the use of a 6V solar cell?

crashzoom (author)  Mr_Rep5 months ago
I believe that the 4AA holder cause it has the same voltage
97737769018 months ago
can i use 5.5 volts solar cell
crashzoom (author)  97737769015 months ago
of course you will only need to adjust the output to 5 volts
otmpp7 months ago
where can I get a solar panel in the UK anyone
crashzoom (author)  otmpp6 months ago
order one from eBay
SparkySolar8 months ago

Thank you for your Instructable

Nice job.


crashzoom (author)  SparkySolar6 months ago
thank you :-)
SparkySolar8 months ago

Thank you for your Instructable

Nice job.


edservice1 year ago

Could you please provide a part # and source for the solar panel

crashzoom (author)  edservice1 year ago
billbillt1 year ago

great project...well done...

crashzoom (author)  billbillt1 year ago

Tnx :)

Whats the name of that adjustable boost module? I have a dc-dc buck converter but it does not boost voltage.
crashzoom (author)  gravityisweak1 year ago

crashzoom (author)  crashzoom1 year ago

That's the one i bought

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