Ghurd used to power his Christmas lights with a small wind or solar project. It is nice when you can use something you built in a pinch. Where I am at we also do not often have power outages. I got up one morning to find my computer not working. The lights were on as they switch to solar when there is power automatically. It took me a bit longer than it should have to realize that the mains power was actually out. It did not stay off long enough for me to rig a cord for the computer and monitor to the inverter though. I use DPDT relays to switch stuff and I was concerned that the computer might not like the power blip when it switched, so I did not have its circuit switch to solar like the lights and some other stuff. I like your little panel. I made some similar, got condensation in them when left out, so I switched to encapsulating them. I have a small vacuum oven, so the last panel I made - a few years back now - was an EVA, Tedlar sandwich, ended up with some air bubbles in it from when baked under vacuum, but that does not seem to impact it when left out. I like that construction method and suspect that one will last a long time even with all of its imperfections. Incidentally, I find that my BMS's let my 18650's charge a bit higher than I would like and discharge quite a bit lower. I have taken to adding LVD's to my powered circuits separate from the BMS to prevent over discharge. On my larger setup with these type batteries, I can use the charge controller to limit the overall voltage, though the BMS is the only cell level protection. So far so good, but my learning with Lithium Ion is still a work in progress. Rich