How Do You Design A Sump Pump Battery Backup System?
• Here are the instructions for building the battery backup system. The instructions listed below are for a ½ HP sump pump. Do not connect any sump pump larger than ½ HP to this battery backup system. • Assemble all the parts as shown in the diagram. Connect the AC relay, DC to AC inverter, ½ HP sump pump, and marine battery together – according to the manufactures documentation or schematics. (NOTE: For safety reasons, secure the relay and wire connections in a water tight plastic enclosure. Also, make sure ALL parts of this system are protected against any water splashing in the sump pump area.) • Connect the 6ft electrical AC power cord to the relay as shown in the diagram. That’s where the 110VAC (electrical outlet) connects to the relay. You’ll see later that this power cord will plug into your electrical wall outlet. • This step is extremely important. Triple check your connections before you apply any AC electrical power to your battery backup system. • If you connected the DC t
