this post was submitted on 19 Sep 2025
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Ive had a number of these devices. And the number 1 thing that fails is the battery. It might also be where I am at. We have 110+F days that cause spicy pillows or failures after a year or so.

So I was wondering, is there a way to make a "daytime only" node that turns on where theres enough sunlight to power the thing, and then turns off where there is not enough sunlight?

I figure I could just get a 5V solar panel and hook it up directly to one of the nodes. I'm just nervous that it will under voltage the device over the long run if that makes sense.

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[–] czardestructo@lemmy.world 2 points 1 week ago

So, I design battery packs for a living. 115F ambient operating conditions are doable assuming you dont add solar loading. Can you paint your enclosures white? Or cover them? A high quality 18650 will operate fine up to 50C especially with a very light load and a low charging current. Do you have more details on your setup, chipset and average load?