Battery backup pumps are not essential when it comes to sump pump installation
. Many people want to avoid the extra costs associated with the backup system. However, in the event that power does go out, your sump pump will be rendered useless. This can happen often in storms and floods, which the pump system is designed to combat.
Although the battery backup pumps are optional, they are therefore highly recommended, and are actually a pretty crucial piece of equipment for protection against extreme elements. You can consider the backup pump to be a kind of insurance policy. The initial costs may be more, but if or when power shuts down the system will pay for itself by providing protection, and avoiding further work that flood damages could cause.