I'm only half kidding. I'm a bit of a prepper and I have lots of powerbanks and devices that charge from USB but besides idling my truck I really had no other way to charge any of them in case of a long-term power outage which seemed a bit of an oversight on my part.
Not like this solves the issue. 30 watts (under ideal conditions) isn't much but it's a start.
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Also don't charge devices directly from solar power because voltage changes drastically due to sun movement and clouds. Better load a power bank and use that to charge the other devices as power banks are much more resilient to changing voltages.
Unless your power bank has a built in charge controller, this should also include your power bank. At its core, a power bank is nothing more than a big ass lithium ion (or maybe potassium ion, if it's newer) battery, just like the one in any other device.
Potassium ion?
You're saying I can ditch the lemons and power my potato with bananas?
You're better off using the bananas as nuclear fuel. I hear they're radioactive
Indeed. They're all the rage in China right now (I AM NOT A TANKIE). Some are predicting they're the "next generation" of battery technology.
https://en.wikipedia.org/wiki/Potassium-ion_battery
Errr I am pretty sure those are currently only in use in prototyping and research, did you mean a different battery technology?
Yeah, I think I meant Sodium-ion
That makes more sense. I'm still skeptical. Sodium ion is being sold as safer than lithium ion, but I just read a paper that shows its still worse than LFP. time will tell