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The Riello Sentinel Pro 2 is a powerhouse of protection, but when you need to bridge long power gaps, we offer the dedicated BTC SP2 battery extension packs. At Comms Express, our range covers everything from 36V packs for the SP2 1000 to high-voltage 72V packs for the 2200 and 3000 models. With capacities ranging from 7Ah to a massive 40Ah, these external battery cabinets give you the flexibility to build a backup system that lasts for hours, not just minutes. Keep your critical servers running through any storm with our fast delivery and expert advice

The Riello BTC SP2 36V BB A3 Sentinel Pro2 7Ah Battery Extension Pack is designed to extend the runtime of your UPS system, providing dependable backup power when it matters most. Built for seamless integration with the SP2 1000, it ensures continuity for critical equipment during outages or unstable power conditions.
Key Features of Riello BTC SP2 36V BB A3
Compatible with Riello Sentinel Pro2 SP2 1000 UPS systems
36V battery configuration for reliable extended runtime
7Ah capacity for consistent backup performance
Plug-and-play design for easy installation
Durable construction for long-term use
Optimised for critical power applications
Extended Runtime Capability
This battery extension pack significantly increases the runtime of your connected UPS, allowing systems to remain operational for longer during power disruptions. Ideal for environments where downtime is not an option.
Seamless System Integration
Designed specifically for use with the Sentinel Pro2 SP2 1000, this extension pack integrates effortlessly with existing setups, ensuring a stable and efficient power management solution without complicated configuration.
Reliable Power Delivery
With its 36V configuration and 7Ah capacity, the unit provides consistent and dependable energy output, supporting sensitive electronics and preventing unexpected shutdowns or data loss.
Simple Installation Process
The plug-and-play design allows for quick deployment, reducing setup time and making it easy to expand your UPS runtime without the need for specialist tools or technical expertise.
Built for Demanding Environments
Constructed with durability in mind, the battery pack is suitable for professional and commercial settings, ensuring it can withstand regular use while maintaining performance.
Ideal for Critical Applications
Perfect for IT infrastructure, network equipment, and other essential systems, this extension pack helps maintain uptime and operational stability during power interruptions.

The Riello BTC SP2 36V BB M1 Sentinel Pro2 14Ah Battery Extension Pack is engineered to deliver extended backup performance for critical power systems. Designed for use with the SP2 1000, it enhances runtime capacity, ensuring essential equipment remains powered during outages or unstable supply conditions.
Key Features of Riello BTC SP2 36V BB M1
Purpose-built for Riello Sentinel Pro2 SP2 1000 UPS systems
36V battery setup for stable and efficient energy delivery
14Ah capacity for extended runtime compared to standard packs
Quick and straightforward installation with plug-and-play design
Robust build quality for long-term reliability
Ideal for critical systems requiring prolonged uptime
Enhanced Runtime Performance
With a higher 14Ah capacity, this battery extension pack delivers longer backup durations, making it well-suited for environments where maintaining power continuity is essential.
Designed for Seamless Compatibility
Fully compatible with the Sentinel Pro2 SP2 1000, this unit integrates smoothly into existing UPS configurations, ensuring efficient operation without additional setup complexity.
Consistent Power Output
The 36V configuration supports stable and reliable energy flow, protecting sensitive devices from sudden shutdowns and helping to maintain operational integrity.
Effortless Installation
Its plug-and-play format allows for quick deployment, enabling users to expand their UPS system runtime with minimal effort and no specialist tools required.
Durable and Dependable Design
Constructed for demanding environments, the battery pack is built to withstand continuous use while maintaining consistent performance over time.
Suitable for Critical Infrastructure
Ideal for supporting IT systems, networking equipment, and other essential applications, this extension pack helps minimise downtime and ensures continuity during power disruptions.

The Riello BTC SP2 36V BB B1-1 Sentinel Pro2 40Ah Battery Extension Pack is built to deliver maximum runtime support for high-demand power environments. Designed for compatibility with SP2 and SD2 1000 systems, it provides a substantial increase in backup duration, helping maintain continuity during extended outages.
Key Features of Riello BTC SP2 36V BB B1-1
Compatible with Riello Sentinel Pro2 SP2 and Sentinel Dual SD2 1000 UPS systems
High-capacity 40Ah battery for extended backup runtime
36V configuration for stable and efficient power delivery
Plug-and-play installation for quick system expansion
Engineered for demanding and critical environments
Supports prolonged uptime for essential equipment
Maximum Runtime Extension
With a powerful 40Ah capacity, this battery pack is designed to significantly extend UPS runtime, making it ideal for situations where longer backup duration is required.
Dual System Compatibility
Supporting both Sentinel Pro2 SP2 and Sentinel Dual SD2 1000 models, this unit offers flexible integration across multiple UPS setups, ensuring broader usability.
Stable and Efficient Power Output
The 36V battery configuration ensures consistent energy delivery, helping protect connected systems from interruptions, data loss, or hardware stress during power events.
Quick Installation and Expansion
Designed with ease of use in mind, the plug-and-play format allows for fast deployment, enabling users to expand runtime capacity without complex installation procedures.
Heavy-Duty Construction
Built to perform in demanding environments, the unit features a robust design that supports continuous operation and long-term reliability.
Ideal for Extended Backup Needs
Perfect for critical infrastructure such as servers, network systems, and essential electronics, this extension pack ensures systems remain operational during prolonged power outages.

The Riello BTC SP2 72V BB A3 Sentinel Pro2 7Ah Battery Extension Pack is designed to extend the backup capabilities of higher-capacity UPS systems. Built for use with SP2 2200 and 3000 models, it provides reliable runtime support to help maintain operation during power interruptions.
Key Features of Riello BTC SP2 72V BB A3
Compatible with Riello Sentinel Pro2 SP2 2200 and 3000 UPS systems
72V battery configuration for higher power applications
7Ah capacity for dependable runtime extension
Plug-and-play design for simple installation
Durable construction for consistent long-term use
Supports critical systems during power disruptions
Optimised for Higher Capacity UPS Systems
Specifically designed for SP2 2200 and 3000 models, this extension pack ensures compatibility with more demanding UPS setups, delivering reliable backup support where it is needed most.
Extended Runtime Support
The additional battery capacity allows connected systems to remain powered for longer periods, helping to reduce downtime during unexpected outages.
Stable 72V Power Configuration
The 72V setup provides consistent and efficient power delivery, ensuring connected equipment operates smoothly and safely during backup conditions.
Quick and Simple Installation
With its plug-and-play design, the battery pack can be installed quickly, allowing users to expand runtime capacity without complex setup or delays.
Durable for Continuous Operation
Built to withstand ongoing use in professional environments, the unit offers reliable performance and longevity under regular demand.
Supports Critical Infrastructure
Ideal for servers, networking equipment, and other essential systems, this extension pack helps ensure operational continuity during power disruptions.

The Riello BTC SP2 72V BB M1 Sentinel Pro2 14Ah Battery Extension Pack is built to enhance the runtime of higher-capacity UPS systems, delivering reliable backup power for extended periods. Designed for use with SP2 2200 and 3000 models, it ensures essential systems remain operational during power disruptions.
Key Features of Riello BTC SP2 72V BB M1
Compatible with Riello Sentinel Pro2 SP2 2200 and 3000 UPS systems
72V configuration for higher power demands
14Ah battery capacity for extended runtime performance
Plug-and-play design for quick and easy installation
Durable construction for long-term reliability
Ideal for critical and high-load environments
Extended Backup Duration
With a 14Ah capacity, this battery extension pack provides longer runtime compared to standard units, making it suitable for environments where extended power continuity is essential.
Designed for High-Capacity Systems
Engineered specifically for SP2 2200 and 3000 UPS models, this unit integrates seamlessly into higher-load setups, ensuring stable and efficient operation.
Consistent 72V Power Output
The 72V configuration supports reliable energy delivery, helping to protect sensitive equipment from interruptions, shutdowns, or data loss during power outages.
Fast and Simple Installation
The plug-and-play format allows for quick setup, enabling users to expand their UPS runtime without complex installation or additional configuration.
Built for Demanding Environments
Constructed with durability in mind, the battery pack is suitable for continuous operation in professional settings where reliability is critical.
Supports Critical Equipment
Ideal for servers, networking hardware, and essential systems, this extension pack helps maintain uptime and operational stability during extended power interruptions.

The Riello BTC SP2 72V BB B1-1 Sentinel Pro2 40Ah Battery Extension Pack is designed to deliver maximum runtime support for high-capacity UPS systems. With its high-capacity configuration, it provides extended backup power to keep critical equipment running during prolonged outages.
Key Features of Riello BTC SP2 72V BB B1-1
Compatible with Riello Sentinel Pro2 UPS systems requiring 72V extension packs
High-capacity 40Ah battery for maximum runtime extension
72V configuration for efficient high-load power delivery
Plug-and-play design for straightforward installation
Robust construction for demanding environments
Ideal for critical infrastructure and extended backup needs
Maximum Runtime Performance
With a powerful 40Ah capacity, this extension pack is built to provide substantial runtime increases, making it suitable for applications that require extended backup duration.
Optimised for High-Load UPS Systems
Designed for use with 72V Sentinel Pro2 systems, this battery pack ensures compatibility with higher-capacity UPS units, supporting stable and efficient performance under load.
Stable and Efficient Power Delivery
The 72V configuration enables consistent energy output, helping to protect connected systems from interruptions, shutdowns, and potential data loss during power events.
Simple Installation and Expansion
The plug-and-play design allows for quick and easy integration, enabling users to expand their UPS runtime without complex setup or specialist tools.
Durable Build Quality
Engineered for reliability, the battery pack is constructed to withstand continuous use in professional and commercial environments.
Ideal for Extended Backup Applications
Perfect for supporting servers, networking equipment, and other critical systems, this extension pack ensures continued operation during longer power outages.