Best Battery Backup for NAS Drives
NAS drives are the backbone of your digital storage—whether you’re running a Synology, QNAP, Asustor, or TerraMaster system. But without battery backup, a sudden outage can corrupt data, trigger RAID rebuilds, and cause downtime that disrupts your workflow. A reliable UPS keeps your NAS powered long enough to shut down gracefully, preserving file integrity and avoiding costly damage. This guide highlights UPS units optimized for NAS protection, with clean power delivery, USB monitoring support, and enough runtime to handle safe shutdowns.
Below is our top pick for most NAS setups, followed by four additional options that excel in different environments. Each recommendation includes specs, pros and cons, and real-world review insights to help you choose the right backup for your storage system.
🔋 CyberPower CP1500PFCLCD – Best Overall UPS for NAS
The CyberPower CP1500PFCLCD is a pure sine wave UPS with 1500VA of capacity, ideal for protecting NAS drives from sudden outages. It supports USB monitoring, which allows most NAS systems to detect battery status and initiate automatic shutdowns. The LCD screen shows load and runtime, and the unit runs quiet enough for office or home environments.
Key Specs
- Capacity: 1500VA / 1000W
- Waveform: Pure sine wave
- Features: USB monitoring, LCD screen, AVR
- Best for: 2–8 bay NAS systems with RAID
Pros
- Pure sine wave output protects sensitive electronics
- USB monitoring enables graceful NAS shutdown
- Strong runtime for multi-drive setups
- Trusted CyberPower reliability
Cons
- Heavier than basic UPS units
- Higher price point
Customer Review Highlights
Users consistently praise this unit for powering Synology and QNAP NAS systems during outages. Many mention successful integration with DSM and QTS software for automatic shutdowns. Several note that it prevented RAID rebuilds after power loss.
View CyberPower CP1500PFCLCD on Amazon
More Great Battery Backups for NAS Drives
NAS drives vary in size and power draw. The options below cover everything from single-bay home setups to multi-bay business arrays.
📦 APC BX1500M UPS
The APC BX1500M is a line-interactive UPS with sine wave output and 1500VA capacity. It’s a strong choice for NAS systems with multiple drives or attached peripherals. USB monitoring is supported for automatic shutdown.
Specs
- 1500VA / 900W
- Sine wave output
- LCD screen, AVR, USB port
Pros
- Reliable power for multi-drive NAS setups
- Works with Synology and QNAP shutdown protocols
- Good runtime and visibility
Cons
- Bulkier than entry-level units
- LCD may be dim in bright rooms
🔋 CyberPower CP850AVRLCD
The CyberPower CP850AVRLCD is a compact UPS with 850VA capacity, ideal for single or dual-bay NAS drives. It supports USB monitoring and includes AVR to smooth voltage fluctuations.
Specs
- 850VA / 510W
- Simulated sine wave
- LCD screen, AVR, USB port
Pros
- Great fit for small NAS setups
- Quiet operation
- Affordable and reliable
Cons
- Simulated sine wave may not suit sensitive gear
- Limited runtime for larger NAS systems
🧠 Amazon Basics UPS 600VA
The Amazon Basics 600VA UPS is a budget-friendly option for protecting a single-bay NAS or modem + NAS combo. It’s simple, compact, and provides enough runtime for graceful shutdowns.
Specs
- 600VA / 360W
- Standby topology
- LED indicators
Pros
- Very affordable
- Good for basic NAS protection
- Small footprint
Cons
- No LCD screen
- No USB monitoring
💼 CyberPower CP1000PFCLCD
The CyberPower CP1000PFCLCD is a pure sine wave UPS with 1000VA capacity, ideal for prosumer NAS setups with 4–6 bays. It supports USB monitoring and includes AVR for voltage stability.
Specs
- 1000VA / 600W
- Pure sine wave
- LCD screen, AVR, USB port
Pros
- Clean power for sensitive NAS drives
- USB monitoring for graceful shutdown
- Compact tower design
Cons
- Higher cost than simulated sine wave units
- Heavier than basic models