Thanks for the input, Robert. It sounds like my thinking was on track. With using the Sonos software, once I share a link to it from my phone, my computer, or any other devices connected on the network through wifi, it makes all those files available for any other network device to play.
I can't imagine that using an inverter to power the Sonos speaker and a router would be a very high draw. The Sonos PLAY:3 speaker draws a maximum of 2A, and no doubt the router draws way less.
Of course, to access any of the millions of songs online, I would have to have access to the internet.
2017 Escape 5.0 TA (someday soon, I hope
2015 Ford F150 Lariat 3.5L EcoBoost
2009 Escape 19 (previous)
“Most folks are about as happy as they make up their minds to be.” — Abraham Lincoln