Glentronics Inc BW-27AGM Agm Backup Sump Pump Battery

Product Description

The GLENTRONICS INC BW-27AGM is a maintenance-free AGM (Absorbent Glass Mat) battery designed for battery backup sump pump systems. Completely sealed construction eliminates the need to add battery fluid or distilled water, reducing service calls and owner maintenance between pump activations. Weighing 51 pounds, this is a full-size standby battery built to sustain extended intermittent pump operation during power outages. It is installed by plumbing contractors, HVAC technicians, or experienced service pros working on basement water management systems.

This battery is intended for residential basement sump pump backup applications where grid power loss creates flood risk. The sealed AGM design suits installations in finished basements or confined utility areas where venting a flooded lead-acid cell is impractical. When connected in parallel using jumper cables, two BW-27AGM units can extend total backup runtime across multi-day outage events. Parallel jumper cables are required for dual-battery configurations and are sold separately.

Key Features

• Maintenance-free AGM construction — no fluid or distilled water additions required
• Completely sealed housing suitable for enclosed or finished basement installations
• Supports intermittent sump pump operation for extended multi-day periods
• Parallel-compatible — connect two batteries to increase total backup runtime
• 51-pound full-size standby battery for high-capacity backup reserve

Compatibility

Compatible with most Basement Watchdog systems including the Basement Watchdog Emergency BWE, Basement Watchdog Combination DFK961, Basement Watchdog Special+ BWSP+, and Basement Watchdog Big Combination Sump Pump System BW4000 with Special+ Backup Controller.

Installation Notes

Installation should be performed by a qualified plumbing or HVAC technician familiar with low-voltage DC standby power systems. Disconnect the backup pump controller from its power source before connecting or disconnecting the battery. Verify terminal polarity before making connections to avoid damage to the controller or battery. When configuring a dual-battery parallel setup, use appropriately rated parallel jumper cables rated for the system current draw — jumper cables are not included with this unit.

Technical Specifications

• Battery Type: AGM (Absorbent Glass Mat), Maintenance Free
• Construction: Completely Sealed
• Weight: 51 pounds
• Package Quantity: 1
• Unit of Measure: EA

Standard Information

• Brand: GLENTRONICS INC
• Manufacturer Part Number: BW-27AGM