andre
New member
- Joined
- Sep 28, 2024
- Messages
- 13
In my area there's an energy crisis and we are having 4 hour power outages 2x a day… this of course is inconvenient for the most part, as I would usually be able to work on my laptop by tethering to my phone... except... Cell service collapses as everyone switches to mobile internet.
My ISP still works though. I put a step down converter on a 6S 21Ah battery (yes, it's big as a brick), but it’s difficult having to switch the cables on the router manually 4 times a day since the router and modem are not in my apartment.
I would like to build a UPS with more available 18650 batteries, I'm thinking in a 3S2P configuration.
Off the shelf UPS's are expensive and stupid for routers, especially because they convert 12v DC to 110v AC just to convert it back to 12v DC again...
Requirements are:
Fast switching (no brownouts of router/modem)
Stable output voltage of 12V @3A
Anywhere between 4-8 units of 18650 batteries.
Automatic charging when power available.
110v input with power outage sensing.
My ISP still works though. I put a step down converter on a 6S 21Ah battery (yes, it's big as a brick), but it’s difficult having to switch the cables on the router manually 4 times a day since the router and modem are not in my apartment.
I would like to build a UPS with more available 18650 batteries, I'm thinking in a 3S2P configuration.
Off the shelf UPS's are expensive and stupid for routers, especially because they convert 12v DC to 110v AC just to convert it back to 12v DC again...
Requirements are:
Fast switching (no brownouts of router/modem)
Stable output voltage of 12V @3A
Anywhere between 4-8 units of 18650 batteries.
Automatic charging when power available.
110v input with power outage sensing.