These cameras need neither mains power nor Wi-Fi: a solar panel keeps the battery charged and a 4G SIM sends video to your phone. That makes them a good fit for farms, remote land, building sites and chalets. Models include EZVIZ CB8, HB8 and CB90 solar cameras, the EB8 Pro 4G kit, IMOU AOV and Titan Z, and a Hikvision solar 4G pan-tilt camera.

Tip: plan your data package, since live viewing uses more data than motion clips.