Kerry Wong shows how to make a simple solar trickle charger:
On a few occasions my car struggled to start when I returned from my business trip and I had to charge the battery manually later on by hooking up a charger, which was quite inconvenient. So I decided to make a simple solar trickle charger that can be left inside the vehicle and charge the battery while the car is parked.
More details on Kerry Wong’s blog.
Check out the video after the break.