Dual vs Backup Sump Pump

Most customers, looking for a backup system, purchase a sump pump. Why?

NexPump Ai5600 Intelligent Sump Pump System For only a slight difference in cost, you can upgrade to dual high capacity pump operation in both primary and backup modes.
Greater pumping capacity in 12 volt operation (4000 gph vs 2000)
Dual backup system in 12 volt operation
24/7/365 monitoring of both pumps – not just the backup pump
Elimination of all mechanical floats for greater reliability