DIY Solar Panel QC 3.0 15w




One of the biggest problem today about the solar panels is the part after the solar cells, so the converter/ regulator. I wanted to write that for have the best performance with the solar cells for a smartphone / battery.

What do you need:

Total Cost (with 3 Solar Panels) = 26.50€

If you don't have wires & soldering parts:

I choose to use a Cigarette Lighter Socket + QC Charger because at the moment we can't find QC 3.0 modules, we find them only in the Car chargers.

So lets go

Teacher Notes

Teachers! Did you use this instructable in your classroom?
Add a Teacher Note to share how you incorporated it into your lesson.

Step 1: Create Holes, It's Just for Attach the 3 Solar Panels

Step 2: Solder the Panels

Solder the panel, for increase the voltage like here, we have to connect like that:

(-) panel1 (+) ------ (-) panel2 (+) ----- (-) panel3 (+) if you want to increase only the current you have to connect the (-) with the (-) and the (+) with the (+). But voltage will stay at 5v so the QC 3.0 will not work.

Step 3: Solder the (-) and (+) to the Cigarette Socket.

Step 4: Test It !

I use the new Xiaomi 20 000mAh power bank 2 (QC 3.0) with a low capacity (2/4 charing bar).

Around 10W !
When i made that picture the sun started to drew low, it was 20h14 and the panels were not super clean there was a little of dust on them. 20h14 is bad for the solar power, so it's a really good result! You can add more power by adding a solar panel in parrallele for exemple so you will need 6 panels (because we have to add a second panel for the 3 or the parrallel system will not works). But the QC is limited to 1.5A at 12v so it's overpowered.

Original from my Blog

Edit: during 1 day, i stuck the panels to a window(inside) and during the day(from 10am to 6pm) it recharged the Xiaomi battery around 65%, it's around 50Wh so 13,5 Ah.



    • Indoor Lighting Contest

      Indoor Lighting Contest
    • Make It Fly Challenge

      Make It Fly Challenge
    • Growing Beyond Earth Maker Contest

      Growing Beyond Earth Maker Contest

    2 Discussions