Your opinions on my solar charge controller design, Improvements???

Thread Starter

RIKRIK

Joined Oct 11, 2019
146
Hi I am currently wanting to make some solar powered lights. I could buy a charge controller for a sla battery, Cheap enough but id like something I can fix. Doesn't have to be top spec just has to charge a battery.

Edit :Just realised a silly mistake. Using a 12.1v zener in the voltage regulator makes more sense then a 12v relay. Also would be more efficient. Durrr me

Iv come up with this design. Before ordering the bits. Does anyone see any issues with the design. I am only using a 25w panel.
SIMPLESOLAR.png
The bottom bit is me switching from 13.4v to 13.5v. The slope is about 10ms.

Kind regards Rick
 
Last edited:

LowQCab

Joined Nov 6, 2012
1,308
There is no need to turn anything "On" or "Off".
Just replace the Laptop Power Brick in this Circuit with your Solar-Panel.

If You want to add more Panels,
just put this same Circuit on the Output of each Panel,
then You can parallel as many as you'd like, and they will all play nice together.
.
.
.
2-Amp Battery Charger FLAT .png
 
Last edited:
Top