It looks like you may need a "battery generator" basically a very large power bank with (200+ wh) with a built in inverter - something like this:

https://www.amazon.com/Anker-Portable-Generator-Station-Outdoor/dp/B09FF46FQ9

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I would check each device you have that you want on the battery and figure power consumption for a 24 hour period, to be sure you get something big enough to power your stuff.

Quick napkin math: the router will be on 24 hours a day (probably around 12v @ 2 amps) as will the security camera (a wyze v3 eats 5v at 400ma) - assuming you are only running these two devices (and not running lights, fans, charging your phone, etc) - - keeping both of those units up and running would consume around 625 watts per day - you'd need a larger battery pack - ideally 800wh or more - and a large enough solar panel/array to fully recharge the battery pack during the day - if wanting something ready to go, maybe something like this:https://www.amazon.com/Generark-Solar-Generator-Homes-1000W-2000W/dp/B08LQZGKGF or https://www.amazon.com/Anker-A1780-Power-Storage/dp/B0BX64LGFT/