12 / 24 / 48Vdc 500W DC UPS / Battery Charger – NSR Series

12 / 24 / 48Vdc 500W DC UPS / Battery Charger - NSR Series
12 / 24 / 48Vdc 500W DC UPS / Battery Charger - NSR Series - Image 2
12 / 24 / 48Vdc 500W DC UPS / Battery Charger - NSR Series - Image 3
12 / 24 / 48Vdc 500W DC UPS / Battery Charger - NSR Series - Image 4
12 / 24 / 48Vdc 500W DC UPS / Battery Charger - NSR Series - Image 5
12 / 24 / 48Vdc 500W DC UPS / Battery Charger - NSR Series - Image 6

12 / 24 / 48Vdc 500W DC UPS / Battery Charger – NSR Series

  • No-break transfer between mains and battery to load
  • Available with 12Vdc, 24Vdc or 48Vdc nominal output
  • Programmable temperature-compensated charging
  • Deep discharge and battery protection features
  • RS-485 MODBUS RTU standard; optional Ethernet/SNMP
More Information...
SKU: NSR500U
Brand: Helios Power Solutions

From: AUD $1,491.00(From: AUD $1,640.10 inc GST)

Note: Australian GST only applies to orders delivered within Australia. International orders are exclusive of GST. 

Volume discounts are automatically applied when added to the cart.
QuantityDiscountPer Unit Price
1-4 0% AUD $1,491.00
5-9 3% AUD $1,446.27
10+ 5% AUD $1,416.45
Volume discounts are automatically applied when added to the cart.
QuantityDiscountPer Unit Price
1-4 0% AUD $1,776.00
5-9 3% AUD $1,722.72
10+ 5% AUD $1,687.20
Volume discounts are automatically applied when added to the cart.
QuantityDiscountPer Unit Price
1-4 0% AUD $1,491.00
5-9 3% AUD $1,446.27
10+ 5% AUD $1,416.45
Volume discounts are automatically applied when added to the cart.
QuantityDiscountPer Unit Price
1-4 0% AUD $1,776.00
5-9 3% AUD $1,722.72
10+ 5% AUD $1,687.20
Volume discounts are automatically applied when added to the cart.
QuantityDiscountPer Unit Price
1-4 0% AUD $1,491.00
5-9 3% AUD $1,446.27
10+ 5% AUD $1,416.45
Volume discounts are automatically applied when added to the cart.
QuantityDiscountPer Unit Price
1-4 0% AUD $1,776.00
5-9 3% AUD $1,722.72
10+ 5% AUD $1,687.20
Volume discounts are automatically applied when added to the cart.
QuantityDiscountPer Unit Price
1-4 0% AUD $1,491.00
5-9 3% AUD $1,446.27
10+ 5% AUD $1,416.45
Volume discounts are automatically applied when added to the cart.
QuantityDiscountPer Unit Price
1-4 0% AUD $1,776.00
5-9 3% AUD $1,722.72
10+ 5% AUD $1,687.20
Volume discounts are automatically applied when added to the cart.
QuantityDiscountPer Unit Price
1-4 0% AUD $1,491.00
5-9 3% AUD $1,446.27
10+ 5% AUD $1,416.45
Volume discounts are automatically applied when added to the cart.
QuantityDiscountPer Unit Price
1-4 0% AUD $1,776.00
5-9 3% AUD $1,722.72
10+ 5% AUD $1,687.20

Description

NSR500U – 500W DC UPS / Battery Charger (12, 24, or 48Vdc)

The Helios NSR500U is a compact, high-efficiency 500W DC UPS and battery charger available in 12Vdc, 24Vdc, or 48Vdc models. Designed for fixed industrial and infrastructure installations that require uninterrupted DC power and intelligent battery management, the NSR500U ensures seamless no-break power transfer between mains and battery. Typical applications include SCADA networks, telecommunications systems, industrial automation, security equipment, and utility substations.

Part of the next-generation NSR Series, this model combines proven reliability with advanced monitoring, protection, and flexible connectivity. It features programmable temperature-compensated charging, deep discharge protection, low-voltage disconnect (LVD), and electronic circuit breaker (ECB) protection—maximising battery service life and system uptime in critical environments.

The NSR500U is compatible with sealed lead-acid (SLA), AGM, Gel, and Lithium-ion batteries, providing versatility for both established and modern installations. It operates across a wide input range (90–264Vac) and delivers up to 90% conversion efficiency, reducing losses and operating costs. Dual-fan cooling and an IP20-rated chassis ensure reliable performance in harsh environments.

For monitoring and integration, all NSR500U models include RS-485 MODBUS RTU. Optional versions add Ethernet/SNMP with web-based configuration, data logging, and remote diagnostics. Local LEDs and programmable alarm relays provide clear status information, while open communication protocols support seamless integration with SCADA, PLC, and telemetry systems.

The NSR500U is offered with M8 stud terminals as standard, while Phoenix connectors are also available on 24Vdc and 48Vdc models. Combined with its communication options, this makes the NSR500U one of the most flexible and dependable DC UPS solutions in its class.

The NSR Series is engineered and built in Australia, trusted worldwide for critical DC power systems.

Features and Benefits

  • Wide input range (90–264Vac) supports global deployment
  • No-break transfer between mains and battery to load
  • Up to 90% power efficiency reduces heat and energy loss
  • Programmable temperature-compensated charging for extended battery life
  • Deep discharge protection, battery circuit integrity tests, and low-voltage disconnect (LVD)
  • Compatible with SLA, AGM, Gel, and Lithium-ion batteries
  • M8 terminals on all models; Phoenix connectors also available on 24Vdc / 48Vdc models
  • Standard RS-485 MODBUS RTU interface; optional Ethernet/SNMP card with web interface
  • LED indicators, alarm relays and fault signalling for system integration

Key Applications

  • SCADA, automation and process control
  • Telecommunications and network power backup
  • Railway signalling and fixed transport infrastructure
  • Security, surveillance and remote critical equipment
  • Utility and substation DC infrastructure support

Safety Features

  • Input fuse protection, varistor, and surge suppression
  • Battery circuit protection via electronic circuit breaker (ECB)
  • Overcurrent protection, short circuit limiting and overvoltage protection
  • Ingress / chassis protection: IP20 rated enclosure
  • Isolation ratings (I/P–O/P, I/P–FG, O/P–FG) consistent with industrial safety standards

Additional information

Weight4 kg
Dimensions304 × 225 × 70 mm
Output Power (Range)

Output Voltage (Nominal)

, ,

Output Terminals

M8 Studs, Phoenix Terminals

Communications

,

Battery Types

Sealed Lead Acid, AGM, Gel, Lithium-Ion

Specifications

Specification Summary – NSR500U

ParameterSpecification
Power Rating500W
Nominal Output Voltages12Vdc, 24Vdc, or 48Vdc (configurable by model)
Output Current12Vdc: ~41A
24Vdc: ~20.8A
48Vdc: ~10.4A
Input Voltage Range90–264Vac
EfficiencyUp to 90%
Transfer ModeNo-break transfer between mains and battery
Battery CompatibilitySealed Lead Acid (SLA), AGM, Gel, Lithium-ion
Protection FeaturesElectronic circuit breaker (ECB), low-voltage disconnect (LVD), deep discharge protection, surge suppression, overcurrent, short circuit, overvoltage
Operating Temperature–10°C to +50°C
CoolingDual-fan cooling
CommunicationsRS-485 MODBUS RTU standard; optional Ethernet/SNMP card with web server and data logging
Indicators & AlarmsLED status indicators, alarm relays, fault signalling
TerminalsM8 studs (all models)
Phoenix connectors (24Vdc / 48Vdc only)
Ingress ProtectionIP20
IsolationI/P–O/P: 3kVac
I/P–FG: 2kVac
O/P–FG: 500Vac
Dimensions (L × W × H)277 × 156 × 69 mm
Weight2.5 kg

This specification summary may contain errors. Please refer to the product datasheet for full specifications.

Range Summary

NSR500U Series Range Summary

SKUNominal VoltageOutput CurrentPower RatingTerminalsCommunications
NSR500U12S12Vdc~41A500WM8 studsRS-485 MODBUS RTU
NSR500U12SC12Vdc~41A500WM8 studsRS-485 MODBUS RTU + Ethernet/SNMP
NSR500U24S24Vdc~20.8A500WM8 studsRS-485 MODBUS RTU
NSR500U24SC24Vdc~20.8A500WM8 studsRS-485 MODBUS RTU + Ethernet/SNMP
NSR500U24T24Vdc~20.8A500WPhoenix connectorsRS-485 MODBUS RTU
NSR500U24TC24Vdc~20.8A500WPhoenix connectorsRS-485 MODBUS RTU + Ethernet/SNMP
NSR500U48S48Vdc~10.4A500WM8 studsRS-485 MODBUS RTU
NSR500U48SC48Vdc~10.4A500WM8 studsRS-485 MODBUS RTU + Ethernet/SNMP
NSR500U48T48Vdc~10.4A500WPhoenix connectorsRS-485 MODBUS RTU
NSR500U48TC48Vdc~10.4A500WPhoenix connectorsRS-485 MODBUS RTU + Ethernet/SNMP

This summary table may contain errors. Please refer to the product datasheet for full specifications.

Available stock shown is updated live from our warehouse, with stock ready to dispatch. In the unlikely event something has gone wrong, our team will get in touch.

Australian GST applies only to Australian customers. If you’re shipping outside of Australia, GST will automatically be removed at checkout.

Note: other taxes and duties may apply on import to other countries.

Orders for in-stock items are shipped by the next business day, often earlier. We use TNT for orders within Australia, and DHL for international shipping. Delivery times will vary based on destination.

Yes! All shipments (within Australia and international) are tracked. Tracking information will be emailed to you. If you don’t receive the email, please contact our team.

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Helios Power Solutions

Welcome to our Australian online store, with select products ready to ship worldwide. 

If you’re looking for our full range of distributed products, as well as custom solutions, please head over to the Helios Power Solutions Main Site.

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