We gave my step-son one for his birthday last year.
He loves it. Was on sale at Cabela's for about $120. He has a cabin that was his father's in the Adirondack's with no power. Uses it there. Uses it on his boat out of Fort Lauderdale. Does dry camping on islands in the northern keys.
Charges his phone, his iPad just fine. Don't remember the model number.
DW got me this for Christmas
Poweradd which charges by solar, and has a battery to hold 23,000mAh.
During the ice storm last week, we dug it out and it powered the phones to recharge, and the MiFi.
I think it's a great item to have - for one because it can be used when away from the vehicle. Portability is a big plus and a lot of people need that.
Certainly wouldn't even attempt to use it or a similar solar device to power anything in the trailer / TV.
For that you need real solar power - and that's a completely different subject/ discussion.