I've looked into this a little bit and as far as actual surveillance cameras I could not find anything with a decent sized battery or solar panel for continuous

I've looked into this a little bit and as far as actual surveillance cameras I could not find anything with a decent sized battery or solar panel for continuous video. In my case a middle of the road compromise was to use solar+battery game hunting cameras, sometimes referred to as trail cameras. They can use both lithium non rechargeable batteries and have a built in rechargeable battery connecting to a small solar panel. They are configurable to do short videos of movement and/or pictures and work in low light. That met my needs. Some of them have bluetooth/wifi for monitoring from a short distance but I have never tried using that feature. If you look for these on Amazon, use care. Some of the sellers are paying people for 5 star reviews.