Simply put, it depends. To ensure your security cameras will function continuously during a disaster, such as a power outage, you must first identify the type of camera system you're operating. Thoroughly research your system and be on the lookout for problematic areas. Some have mistakenly assumed a wireless system does not need direct power however, this could not be farther from the truth. A wireless system not only needs power but it also needs network access, another function requiring power. If your security camera system was installed by professionals, you may be pleasantly surprised to find out disaster planning was included the design process and you are well prepared for an outage. If you've determined your system is not fully operational during an outage, you may need to implement a power solution.
Some of these solutions include things like remote battery backup support, solar panels, or even generators, all of which provide power to key components. Implementing these solutions may prove challenging and are oftentimes best left to the professionals. If you choose to consult with a professional security camera company, be sure they provide planning options for both short and long-term outages. Doing so will allow you to develop a comprehensive power and/or network access solution to maintain security during an outage. Once you've implemented a solution, be sure to schedule regular checkups. An easy way to check your systems backup power is to flip the breaker to off. Testing the integrity of your backup power supply annually is strongly encouraged to ensure your security system is functioning properly and has the "power" it needs to do the job.