Construction Site Security

For a customer we are designing a camera surveillance system which we will be mount a light towers. the current design is based on 4 hikvision DS-2CD2142 camera's, 2 Redwall SIP4010 5 detectors for detection. the whole system will be powerd by solar panels. now I am looking for industrial POE switches which will power the camera's and the detectors. so any suggestions for these using low power. also looking for a NVR which will send a message when an intruder is detected, and for local storage.

As the system is being powered by solar panels it would be easy if the hardware (switch as well as NVR is powered by 12V)

I am looking for suggestions for hardware or maybe someone who already has designed a system which has been tested and is working great.

many thanks and a Bon anja Nobo (happy new year)

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