<p>Farms, construction sites, shop fronts under construction and remote storage yards often have no mains power and no internet line. Two kinds of camera are built for these places.</p> <h2>Solar cameras</h2> <p>A solar camera uses a solar panel and a rechargeable battery, so it needs no power cable. For reliable results, place the panel where it gets several hours of direct sunlight every day and keep it clean.</p> <h2>4G SIM cameras</h2> <p>A 4G camera has a SIM card slot and sends video over the mobile network, so it needs no WiFi or broadband. You need a data plan and good mobile coverage at the spot, and it is worth checking signal strength before you fix the camera in place.</p> <h2>Using them together</h2> <p>Many remote installations combine both: a solar-powered 4G camera works anywhere the sun and the mobile network reach. Record to a memory card in the camera so footage is kept even if the signal drops for a while.</p>