I wanted to share an exciting project I’ve been working on to integrate solar power into my SmartThings setup. After experiencing issues with door sensors failing in extreme cold (-35°C), I decided to explore a more reliable and eco-friendly solution. Here’s what I did: I removed the original lithium batteries from my Fibaro door sensors and connected them to a 5V solar panel with a built-in blocking diode. This setup ensures the sensors stay powered even during long, cold winters. The process involved soldering the battery terminals to the sensor’s internal contacts and securing everything in an outdoor-rated enclosure. I also added an on/off switch for easy maintenance. One of the best parts about this project is the cost-effectiveness—around $8 per sensor. Plus, it eliminates the need for frequent battery replacements, reducing waste and saving money in the long run. I’d love to hear if anyone else has tried similar setups or has tips for improving this system. It’s been running flawlessly since July 2019, and I’m thrilled with the results! 