During a power outage, a battery backup will operate the pump for hours at a time, protecting your home. Having your pump serviced regularly can extend its lifespan and protect your home from flooding. Sump Pump Repair: Having a working sump pump is a luxury you should not take for granted. It is also important to have a backup power source to avoid failure. You should check the pump regularly to ensure it is in working order. However, even the best sump pump in the world is not going to help if it is not installed properly. The main purpose of a battery backup sump pump is to provide extra protection against water damage. For example, the type of pump you choose and how it is installed will affect the final price. When you do, make sure it's installed properly. The cost to install a sump pump depends on many factors.