Sunnytech® 1pc 3w 12v 250ma Mini Solar Panel Module Solar System Epoxy Cell Charger DIY B047

小型ながら、弱い太陽光でも結構発電する。

Works perfect to power a 12v fan for the black waste vent on my camper during the hot summer months.

No issues so far. I'm using this with a charging circuit for a 18650 battery for a data collecting application. It's doing the job, but even in full Florida sun, I'm not hitting the advertised output. There could be a host of reasons for this (including operator error). I've picked up cheaper panels from eBay with similar output, but was hoping that the slight premium meant higher output.

These are DIRT cheap 3W panels. I've gotten a handful of themn over the last year or so. Typically I hook up two in parallel to a USB buck converter for making a little phone/powerbank charger, and they work great for that. One panel is more than enough to power little microcontroller applications/low energy demand stuff. Lots of fun DIY projects to be had with this, I'm hoping Sunnytech makes more of this model available. (I just bought another 7, but there's only a few left in stock as of this writing). If you're reading this though, Sunnytech, you'd make me reeeeal happy if you made a single panel that was 12V 6W. Would definitely make 3D printed enclosures easier. :P

I get over 12V, but in November, all afternoon, I didn't get more than 180+mA. I may have to get another to make this work. But it is nice and thin, removable plastic covering, probably expoxy coating which means it will "fuzz over" over time, like older car headlights. I guess either replace 'em, or try to polish 'em back up.