Brand: EnerSys

EnerSys PowerSafe DU Battery

Name: EnerSys PowerSafe DU Battery – Datasheet & Price Quote
Brand: EnerSys

Description

Overview

EnerSys PowerSafe DU is a flooded lead-acid reserve power battery built on a flat-plate, lead-calcium grid alloy platform, designed for the long float-service life demanded by telecommunications network power and central-office switching applications. Offered in 4 to 8-cell configurations with capacity from 310 to 780 Ah at the 8-hour rate, it delivers a rated design life of up to 20 years in float service at 77°F ambient, giving network operators a dependable, low-maintenance backup platform for critical infrastructure, and it remains one of the most widely specified reserve batteries in telecom plant engineering.

With fast quotation turnaround and technical support, Seven Star LLC proudly supplies the EnerSys PowerSafe DU battery to telecom operators, data center engineers, and utility power teams across Oman and the wider GCC. Facilities in the Sultanate of Oman and neighboring Gulf markets can source EnerSys stored energy products through Seven Star LLC with manufacturer documentation and local technical support.

Operating Principle

The PowerSafe DU cell stores electrical energy through a reversible chemical reaction between lead dioxide and sponge lead plates immersed in a dilute sulfuric acid electrolyte. Its flat-plate, lead-calcium grid alloy construction is specifically formulated to minimize grid corrosion and water loss during extended float charging, the normal standby state in which a telecom rectifier keeps the battery topped up while it waits to support the load during a utility outage. This low-maintenance chemistry is what allows PowerSafe DU cells to achieve a 20-year design float life rather than the 5 to 10-year life typical of general-purpose flooded batteries.

A patented Slide-Lock post seal allows the internal plates to expand and contract naturally with charge/discharge cycling and thermal changes without stressing the terminal seal, while a tongue-and-groove jar-to-cover seal keeps the cell leak-free over decades of service. In practical terms, this means the EnerSys PowerSafe DU can be trusted to deliver its full rated capacity instantly during a power interruption, even after years of continuous float charging with minimal maintenance intervention.

Engineering Design of the EnerSys PowerSafe DU

Physically, the EnerSys PowerSafe DU cell is housed in a transparent, UL94 V-0 flame-retardant polystyrene or SAN jar that lets maintenance staff visually check electrolyte level and plate condition without opening the cell. Dual-hole terminal posts allow individual cell voltage and connection monitoring, a feature telecom maintenance teams rely on to catch a weakening cell before it drags down an entire string’s performance. Cells are supplied individually or pre-racked into 4 to 8-cell strings to match a site’s nominal DC bus voltage, typically 24V, 48V, or 130V telecom plant standards.

The battery’s NEBS Level 3 certification for systems under 80V nominal voltage reflects compliance with the seismic, thermal, and fire-safety criteria telecom central offices require, and its Slide-Lock post seal and tongue-and-groove case design are engineered specifically to survive the vibration and handling stresses of installation in a working switching center without any loss of seal integrity.

Key Features

The PowerSafe DU combines proven flooded lead-acid chemistry with construction details aimed squarely at telecom reserve power duty:

Flat-plate, lead-calcium grid alloy construction optimized for long float-service life.
Design life of up to 20 years in float service at 77°F (25°C) ambient temperature.
Capacity range of 310 to 780 Ah at the 8-hour rate, available in 4 to 8-cell configurations.
Slide-Lock post seal design that accommodates natural plate growth without seal stress.
Tongue-and-groove jar-to-cover seal for long-term leak-free reliability.
Dual-hole terminal posts enabling individual cell voltage and condition monitoring.
UL94 V-0 flame-retardant transparent housing for visual electrolyte and plate inspection.
NEBS Level 3 certified for telecom central-office systems under 80V nominal voltage.

Industrial Applications

The PowerSafe DU is deployed primarily in network telecommunication facilities, including central offices, mobile switching centers, and passive optical LAN cabinets, where a proven, long-life flooded battery reduces the frequency of costly string replacements. Its individual cell monitoring capability and transparent jar construction also make it a preferred choice for utility substation control rooms and other installations where maintenance staff need to visually confirm cell health between scheduled service visits.

With engineering support in Muscat, Seven Star LLC supplies and supports the EnerSys PowerSafe DU battery across Oman’s expanding telecom and data infrastructure base, including exchange and switching facilities serving the Sohar and Salalah economic zones and the greater Muscat area. Regional network operators benefit from a reserve power platform with a track record in demanding Gulf ambient conditions, backed by genuine EnerSys product and a local genuine support channel.

Technical Specifications

Key parameters for the EnerSys PowerSafe DU reserve power battery:

Parameter	Specification
Model	PowerSafe DU
Chemistry	Flooded lead-acid, lead-calcium grid alloy
Cell configuration	4 to 8 cells per string
Capacity range	310–780 Ah (8-hour rate, 1.75V/cell, 77°F)
Design life	Up to 20 years float service at 77°F ambient
Case material	UL94 V-0 flame-retardant transparent housing
Terminal design	Dual-hole posts for individual cell monitoring
Certification	NEBS Level 3 (systems under 80V nominal)
Application	Telecom central offices, switching centers, PON cabinets

Request a Quote for EnerSys PowerSafe DU Battery

Telecom operators and facility engineers in Oman and the GCC can request a formal quotation for the EnerSys PowerSafe DU battery directly from Seven Star LLC, including current lead time, full technical datasheets, and string-sizing support for new or replacement installations. Backed by manufacturer datasheet documentation, Seven Star LLC’s power systems division is available to advise on cell selection, rack configuration, and float-charging setup — contact our technical sales team today to begin your PowerSafe DU project.

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About brand

Substations, telecom shelters and UPS rooms rely on battery strings that sit on float charge for years and must deliver on the day the mains fails. EnerSys, based in Reading, USA, builds industrial batteries and chargers for exactly this duty, and PowerSafe is its stationary battery brand. Seven Star LLC sources and supplies EnerSys PowerSafe reserve power batteries for industrial and utility users in Oman and the GCC.

EnerSys PowerSafe ranges listed

Three PowerSafe ranges appear here. PowerSafe OPzV cells are 2 V gel batteries with tubular positive plates, listed from 215 to 3170 Ah. PowerSafe SBS EON is a VRLA range using thin plate pure lead technology, listed from 62 to 3900 Ah. PowerSafe DU is the third range listed. Across the PowerSafe brand the manufacturer offers AGM, gel, flooded and thin plate pure lead designs, in front-terminal, top-terminal and DIN sizes.

Ordering EnerSys batteries: what we need

A battery inquiry needs more than a brand name. Send the cell or monobloc type printed on the label, the nominal voltage and capacity, and the number of cells in the string. Add the system voltage, the required backup time and load if the string is being resized, the terminal layout, and the rack or cabinet dimensions. A photo of the label and of the existing layout removes most doubt.

Browse EnerSys products by category: UPS and Batteries.

Frequently Asked Questions

What makes the EnerSys PowerSafe DU suited for telecom reserve power?

Its flat-plate, lead-calcium grid alloy chemistry is engineered to minimize corrosion and water loss during continuous float charging, giving the PowerSafe DU a rated design life of up to 20 years at 77 degrees F ambient.

Does the PowerSafe DU reduce maintenance and downtime compared to other flooded batteries?

Yes. Its transparent UL94 V-0 jar allows visual electrolyte checks without opening the cell, and dual-hole terminals allow individual cell voltage monitoring, catching a weak cell before it affects the whole string.

What capacities and cell configurations does the PowerSafe DU come in?

The PowerSafe DU is available in 4 to 8-cell configurations with capacities from 310 to 780 Ah at the 8-hour rate, matching common 24V, 48V, and 130V telecom DC plant voltages.

Can PowerSafe DU strings integrate with existing telecom rectifier and monitoring systems?

Yes. PowerSafe DU cells are compatible with standard telecom float-charging rectifier plants and their dual-hole terminals support third-party battery monitoring systems for string-level and cell-level visibility.

Is Seven Star LLC an experienced supply partner for EnerSys products?

Yes, Seven Star LLC is an experienced supplier of EnerSys stored energy products in Oman and the GCC, supplying genuine PowerSafe batteries with manufacturer backing and local technical support.

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