Find the main box containing all the circuit breakers and fuses. On the Forester version of your unit it is on the small inward facing panel below the refrigerator. There should be 10 15 amp fuses there and on is labeled Outside TV.
The Forester models use a Progressive Industries power control center so the Sunseeker may be different (WFCO) but similar.
2018 Forester 3051S (aka Clyde)
2015 Wrangler Toad (aka Bonnie)
At some point during every day you suddenly realize nothing else productive is going to happen the rest of that day. For me, it usually occurs around 9 am.