You can get a basic solar kit on amazon, like this:

https://www.amazon.com/UOYOTT-Battery-Charger-Controller-Caravan/dp/B08CR1Q2GZ/ref=sr_1_25?dchild=1&keywords=solar+kit&qid=1598408118&sr=8-25

And hook it up to a battery and container like these:

https://www.amazon.com/Universal-Power-Group-Minnkota-trolling/dp/B0042QGWSC/ref=sr_1_6?crid=7932G60TDZEX&dchild=1&keywords=trolling+motor+battery&qid=1598408215&sprefix=trolling+%2Caps%2C210&sr=8-6

https://www.amazon.com/MinnKota-Trolling-Motor-Power-Center/dp/B001PTHKMG/ref=sr_1_5?dchild=1&keywords=trolling+motor+battery+box&qid=1598408233&sr=8-5

I bought items similar to these and hooked it up myself as a backup for my car and for when I go camping. I installed it last November and haven't charged it since - its been running on solar the whole time! Whats more, I also use the power from the solar station to create my own wifi network (among other things). If you are buying solar panels on amazon, be sure that you get the monocrystalline panels and not the polycrystalline ones - mono exhibits better efficiency characteristics.