Sump Pump Installation: Having a sump pump installed in your basement can help you avoid water problems. If you're planning to install a new sump pump, you may need a permit. Even a small amount of water sitting on the ground can cause major problems in your home. The main purpose of a battery backup sump pump is to provide extra protection against water damage. Some systems even have an alarm, which can warn the homeowner if the sump pump is not getting enough power. This prevents flooding in the basement and your crawlspace. If the primary pump fails, a battery backup sump pump will help remove the remaining water. This will minimize the possibility of malfunctions.