Is this your sole power source? If so you probably need to use a solar calculator to work out what you need, but irequirements can be surprising if running 24/7 on battery.
..and for that you need to know the actual consumption of your camera ie voltage plus power ie. amperage, (so you can calculate wattage - W=VA), or alternatively if stated the watts. Note here Watts is usually Watts per hour unless stated otherwise. Please note here this should probably be the peak consumption as the camera may use more power at night if running lighting or IR.
Here's one calculator. There are many out there.
Renogy UK brings 3 distinct solar panel calculators to help you estimate your power project requirements.
uk.renogy.com