I don’t have a rubber duck. 🦆
You could make a container for the VPN and have the torrents route through that. Instead of having the whole system go through the VPN. You can then also make the VPN a dependency of the torrent container to prevent it from leaking torrent traffic out of your standard internet connection.
I know there is a Spotify endpoint that you can run on a pi. And I did see a project to make one a Chromecast target. Bit that didn’t work for me.
Those will not be UPSs they will be power banks. Most Powerbanks are lithium. Lithium requires careful monitoring if it is constantly float charged. And they fail catastrophically when over charged.
A reverse proxy is a service that takes incoming traffic on an IP address and port. It reads the URL the connection came into and passes it to the service it is configured for.
Example: A server runs Plex. There is a DNS entry plex.myhome.nework that points to the IP of that server. Nginx listens on port 80 and 443. If a client connects to port 80 using plex.myhome.network nginx will pass it to Plex. If it comes in on 443 nginx will still pass it to Plex but it will also provide the configured SSL cert to the client connecting to Plex.
If the server is also running jellyfin and DNS is setup for jellyfin.myhome.network with the same IP. The user connects to jellyfin.myhome.network on port 80 Nginx instead passes it to jellyfin.
So from our example you can see that we have both jellyfin and Plex using the same IP address and port 80.
The UPS has to cycle the battery for its health. This takes power. The 20W will be the recharge.
There is nothing you can do about that. If you DIY your own, without putting battery healthcare. It will fail when you actually need it. And sometimes catastrophically.
A UPS will have a load. It’s got to keep the battery healthy.
They are intended to keep a more vital system up. Generally a NAS is the backup target. And you’d keep the computer is it the target for on the UPS. Maybe the NAS too.
You can probably get away with a desktop UPS. But the power draw is always going to be a factor. The NAS is designed to stay on all the time. So is low power draw.
If you’re using torrents you aren’t only downloading…