VEVOR Sump Pump Battery Bundle, 2000W, Backup System with 100 Ah LiFePO4 Battery, Auto Switches to Inverter for Sump Pump, Pure Sine Wave, LCD Display, for Basement Protection Emergency Power Outage

No, this system is not waterproof. If this answer does not resolve your current issue, please contact us again for assistance.

It means that the inverter output must not be connected to the mains power at the same time. The two power sources must remain electrically isolated to prevent damage or electrical hazards. This system is designed to automatically switch the sump pump to battery/inverter power during a power outage.

This depends on the battery size. For example, a 100AH ​​battery would provide approximately 1280W * 12.8A / 120V = 0.97H, which is roughly one hour. A 200AH battery would provide double that.