Peter posted this on December 4, 2021
I’d make short posts of things I tinker with (I do that a lot on weekends).
I have an internet router at home which goes off immediately the power goes off.
The interruptions annoy me so I decided to figure a way to have it on for 24hrs.
I first tried connecting the router directly to the output ports on the controller but it didn’t power on so testing with a multimeter, I realized it’s not a steady 12v and the router needs 12v. Nothing more, nothing less.
I decided to research how to get a 12v supply from the charge controller and stumbled on this DC-DC converter (LMS 317) which cost next to nothing and someone had in my city.
I sent a dispatch rider to get it (about 45 mins) then when it arrived, got some wire (always have a lot lying around) and wired the output to the router and the input to the solar controller.
Router now stays on for 24 hours.
1 less thing to think of.
Ps. I noticed the converter acts up when the batteries are full ( > 14v) so I believe it works within a really small range.
I’m ordering a proper buck converter with a wider voltage range as I’d be converting my solar system to 24v in a few days anyway.