On Sun, Apr 6, 2025 at 11:55 AM Mike Hammett via NANOG <nanog@lists.nanog.org> wrote:
I've gone asking, but haven't really gotten anywhere. The best technical solution was from some electronics parts nerds that was basically to build my own small rectifier and battery system. Great. I can achieve high efficiencies with small loads, letting me have say 4 or 8 hours of battery. However, I've got a science project, not something I can deploy at a customer.
If you're willing to consider a *small* science project: Buy a quality UPS in the 300VA range Make a hole in the battery compartment and extend the leads outside (minor soldering work and you can make it look professional with some heat shrink tubing). Connect an external battery that's 2-3 times the capacity. It'll charge real slow, but the charger likely has the capacity to charge the larger battery and that'll give you the desired run time. And if you make the effort to be neat about it, it should be customer deployable. Otherwise, buy a 1000VA UPS that supports external battery modules, buy as many battery modules as it takes for the runtime you want and don't sweat the efficiency. Or if you're dealing with wall wart equipment only, you could try some of these: https://www.amazon.com/s?k=12v+ups Regards, Bill Herrin -- William Herrin bill@herrin.us https://bill.herrin.us/