The Reolink Argus 2 (wireless/solar option) cannot record continually it is only small 10sec or so captures and even then it half the time is too late to capture anything, the solar side was poor esp. at rear of house not in direct sun but bright daylight.
You are ideally going to need to have one wire for power even on a WIFI cam so many will say just get an IP cam that uses POE but then you need an injector to connect to your router.
KAMI have two wireless outdoor cam that run on batteries and, I like the bigger model witch has colour night vision, but so far it cannot record continually either but they do mention that "may" be added in future but then the rechargeable battery will drop from 3-6months so far less unless they bring out a proper working solar add on for it.