NAS Power Consumption Australia (2026): Running Costs, Efficiency and What to Buy

A NAS running 24/7 in Australia can have very different electricity use depending on the model, drive count and power settings. To estimate the running cost, multiply power in kilowatts by operating hours and your electricity rate, or use the Power Calculator. Use the relevant idle, active and hibernation wattage for your workload.

Why NAS Power Consumption Matters in Australia

Australian electricity prices vary by retailer, tariff and location. Because a NAS may run continuously, use the usage rate from your current bill rather than a generic state rate. Enter that rate and the NAS wattage in the Power Calculator to estimate the running cost for your setup.

Electricity costs for NAS devices are often overlooked at purchase time. Buyers focus on the hardware price tag, then realise the ongoing cost compounds over the 5-8 year life of a typical NAS. Choosing a more efficient model or enabling spin-down settings can reduce ongoing consumption.

For solar households, the calculation changes. If your NAS runs during daylight hours, it may consume solar generation that would otherwise be exported. Compare the feed-in tariff and import tariff shown on your current plan. Time-of-use tariffs also matter, so scheduling backup jobs and major file transfers during a cheaper period can reduce their running cost.

NAS Idle vs Active Power: What the Numbers Actually Mean

NAS power consumption is measured in watts (W) and reported at two key states: idle (drives spun up but no read/write activity) and active (drives under read/write load). Vendors also report a hibernation or sleep figure when all drives have spun down. These three figures are what you need to estimate real-world running costs.

The NAS enclosure itself, including its CPU, RAM, network interface and fans, accounts for a significant portion of idle draw. For a Synology DS225+, the enclosure alone draws roughly 4-5W. Each hard drive adds another 3-6W when spun up and 0.5-1.5W when spun down. SSDs have distinct active, idle and device-sleep power states. Their exact consumption depends on the drive and whether the NAS supports the relevant low-power state.

The distinction between idle and active power matters for time-of-use billing. If your NAS is idle 90% of the time, which is typical for a home media server or personal backup device, the idle figure is what drives your annual bill. If you run Plex 24/7 or have a surveillance NAS with 8 cameras constantly recording, active power consumption is more relevant.

Wattage by NAS Model

See the model-specific states and units in the table below.

The DS225+ is a 2-bay NAS using an Intel Celeron J4125 x86 processor. The DS925+ and TS-464 both use more powerful processors. The DS925+ and TS-464 have higher published access or typical-operation figures than the DS225+, although the exact comparison depends on each vendor's test configuration. For users who do not need transcoding or heavy compute, the ARM-based 2-bay models are the most cost-efficient long-term option.

Annual Electricity Cost by AU State

Australian electricity rates vary by state, retailer and plan. Use the usage rate from your current bill and the applicable NAS power state in the Power Calculator. For mixed workloads, calculate each power state separately using the time spent in that state.

How the idle figures are worked out. Synology and QNAP publish two power states only: access, and HDD hibernation with the drives parked. Neither vendor publishes a figure for the state most home NAS owners actually sit in, which is idle with the drives still spinning. So the idle column above is our own estimate, not a vendor number, and it is built like this: take the vendor's published hibernation figure, then add back what the drives draw once they spin up, roughly 3.5W per drive (a spinning drive pulls 3-6W against 0.5-1.5W parked). The result lines up with the rest of the article. Synology rates the DS225+ at 6.08W hibernating, and an enclosure drawing 4-5W plus two parked drives lands in the same place. Treat the active figures as published specifications and the idle figures as a reasoned estimate.

Hard Drive Power Draw: HDD vs SSD in a NAS

The drives inside a NAS often contribute more to total power consumption than the NAS enclosure itself. A 4-bay NAS with four 8TB HDDs draws approximately 18-24W from the drives alone when active. Replace those with four 4TB SSDs and the drive contribution drops, as the table below shows. The enclosure power stays the same. The difference is entirely in the storage media.

For NAS use cases dominated by idle time, such as personal backup, media storage and time capsule replacement, HDDs with spin-down configured are often cheaper to run long-term than SSDs, because HDDs drop to 0.5-1W per drive when hibernating. SSDs have no spinning media, but supported models can enter low-power idle and device-sleep states; exact consumption depends on the SSD and NAS implementation. Over a 5-year period with typical home use (3-4 hours of actual activity per day, 20 hours idle), the electricity cost difference is negligible. SSDs are silent and resistant to mechanical shock, but write endurance must be compared using the ratings and warranty conditions of the exact SSD and HDD models under consideration.

The numbers make a compelling case for SSD in small NAS deployments where cost per TB is acceptable. A 2-bay NAS with two 4TB SSDs draws very little when idle. Comparable to a 2-bay HDD NAS with drives in hibernation. The trade-off is price: 4TB NAS SSDs cost considerably more than NAS hard drives; the Seagate IronWolf 4TB has a market price of about $352 and the WD Red Plus 4TB about $359. For pure home backup use, the SSD running cost saving rarely justifies the upfront premium. For a write-heavy workload like 24/7 surveillance recording, SSDs earn their keep through write endurance, not just power savings. For a deep dive on drive selection see Best NAS Hard Drives Australia.

Power Management: Spin-Down, Scheduled Sleep and Wake-on-LAN

The biggest lever for reducing NAS running costs is power management configuration. Most NAS devices from Synology, QNAP and Asustor support three key features:

• HDD spin-down: Configures drives to park and spin down after a period of inactivity (typically 10-30 minutes). Reduces drive power draw from 3-5W per drive to 0.4-0.8W per drive. Synology calls this HDD Hibernation in DSM; QNAP calls it HDD Standby in QTS. Enable in DSM under Control Panel > Hardware and Power > HDD Hibernation.
• Scheduled sleep / deep sleep: Powers down the NAS entirely on a schedule. Useful for NAS devices that are only accessed during business hours or overnight backup windows. Power use during HDD hibernation, system sleep or scheduled shutdown is model-specific; use the exact state and figure documented by the manufacturer. Set a wake schedule 10 minutes before your backup job to ensure drives are spun up when needed.
• Wake-on-LAN (WoL): Allows the NAS to be woken remotely from a sleep state with a network packet. WoL requires the NAS to support it (most Synology and QNAP models do) and your router or switch to allow magic packet broadcasts. Useful for accessing a sleep-scheduled NAS on demand without leaving it running 24/7.

Spin-down and scheduled shutdown can reduce consumption when the NAS is unused, but the result depends on the model, schedule and time actually spent in each low-power state.

2-Bay vs 4-Bay vs 8-Bay: Running Cost Comparison

Bay count is a strong predictor of NAS power consumption. More bays can mean more drives, more drive power draw, larger fans and a more powerful CPU platform.

Adding bays and drives generally increases power consumption. For home users who do not need 8 bays of capacity, using higher-capacity drives can avoid adding unnecessary bays.

WD Red Plus vs Seagate IronWolf: Power Draw Side by Side

WD Red Plus and Seagate IronWolf are the two dominant NAS-class HDD lines in Australia. Both are designed for 24/7 operation, use CMR recording (not SMR), and carry 3-year warranties. Their power consumption is comparable. The differences are small enough that drive selection should be based on compatibility, price and availability rather than wattage alone.

The Seagate IronWolf 4TB has a market price of about $352. The WD Red Plus 4TB has a market price of about $336. The WD Red Plus 8TB has a market price of about $594. Both lines are stocked by Scorptec, PLE and other major Australian retailers. Choose whichever is cheaper or in stock at the time of purchase.

The WD Red Pro and Seagate IronWolf Pro lines carry 5-year warranties and current models are rated for workloads up to 550TB/year. They draw slightly more power (6-8W active vs 5-6W for standard). The Pro lines are worth considering for NAS devices that see heavy daily write activity. That includes surveillance, frequent large backup jobs or business file servers. For typical home use, the standard lines are appropriate and more cost-effective.

UPS Sizing for Your NAS

An Uninterruptible Power Supply (UPS) protects a NAS from power outages and brownouts. For NAS specifically, a UPS serves two purposes: keeping the NAS running through brief outages, and providing a clean shutdown signal so the NAS can close open files safely before power is lost. A UPS reduces the risk of corruption from abrupt power loss by providing temporary power and, when supported and configured correctly, initiating a clean shutdown.

Sizing a UPS requires knowing the total load in watts and the runtime you need. For home NAS use, 5-10 minutes of runtime is typically sufficient to ride through brief outages or allow a clean shutdown. Business NAS deployments may want 15-30 minutes. UPS capacity is measured in VA (volt-amperes) and watts. A home NAS with four HDDs is a small load for a 650VA/360W UPS; read the runtime at your NAS’s wattage off the UPS maker’s runtime chart. For an 8-bay NAS with 6 or more drives, which draws considerably more, step up to a 1000VA/600W UPS.

Synology DSM and QNAP QTS support several UPS connection modes, including model-dependent USB and network options; verify the NAS, UPS and connection mode in the vendor documentation. For a compatible USB setup, connect the UPS and configure a supported shutdown or standby trigger using the options available for your NAS, UPS and connection mode, then test the behaviour safely. Selected APC, Eaton and CyberPower models appear on NAS compatibility lists; verify the exact UPS and NAS model before purchase. Check the UPS manufacturer's compatibility list before purchasing. Synology publishes a compatibility list on their support site.

Time-of-Use Tariffs and Solar: Reducing Your NAS Running Cost

For Australian households on time-of-use (TOU) electricity tariffs, the cost of running a NAS varies significantly by time of day. Time-of-use prices and windows vary by retailer and plan, even within the Ausgrid network; use the tariff shown on your current electricity plan. Scheduling movable workloads in a cheaper tariff window can reduce the incremental cost of those workloads; the saving depends on the plan's rates and the NAS's additional power draw during the job.

For solar households, schedule movable NAS workloads during periods of surplus generation. Compare the feed-in tariff and import tariff shown on your current plan, then use the Power Calculator with the applicable rate. Media encoding, full backup jobs and cloud sync can be aligned with solar generation where the workload allows it.

Synology's DSM task scheduler allows you to configure backup jobs to run at specific hours. QNAP's QTS has a similar scheduler under Backup Station. Set large backup jobs to run during off-peak or solar window hours. For surveillance NAS deployments where drives must run 24/7, time-of-use scheduling does not help. The load is constant by nature.

Which NAS Has the Lowest Running Cost for Home Use?

For home users who want low electricity consumption, 2-bay NAS devices are strong candidates, whether they run ARM or low-power x86. It is worth correcting a common assumption here: the Synology DS225+ is an Intel Celeron J4125, not an ARM machine. Synology rates it at 6.08W during HDD hibernation and 16.98W during access.

The Intel-based DS425+ has lower published power figures than the AMD-based DS925+. Choose between the DS425+ and DS925+ based on the applications you will run: the DS925+ offers stronger general-purpose CPU and memory capabilities, while the DS425+'s Intel J4125 includes Quick Sync hardware. Verify support in the specific media application. Its x86 CPU earns its electricity cost only when under load. For the full picture on which model suits which use case, see the Best NAS Australia guide.

The QNAP TS-233 is worth noting for pure power efficiency. QNAP rates the TS-233 at 3.43 W in disk standby and 10.81 W in typical operation with drives fully populated. See the comparison table above for its current Australian price, which moves with retailer promotions. QNAP's QTS software is more feature-rich but also more complex than Synology DSM, which can be a consideration for first-time NAS users.

Power consumption varies by hardware and configuration. Some old desktop PCs draw substantially more than a purpose-built NAS, while efficient mini PCs can idle below many multi-bay NAS models. For broader context on the NAS value proposition, see our guide to NAS vs Cloud Storage Australia and What Is a NAS?

Power Consumption for Business NAS: What Changes

Business NAS deployments have different power consumption profiles from home NAS. Key differences:

• Higher drive counts: Business NAS typically runs 4-12 bays, all populated. Drive count is the dominant cost factor. Synology rates the DS1525+ at 44.56 watts during access, while QNAP rates the TS-664 at 44.02 W in typical operation with drives fully populated.
• 24/7 active duty: Unlike home NAS where drives spend most time in hibernation, a business NAS serving 5-20 users has drives spinning continuously. Budget for active-state power, not idle.
• Redundant power supplies: Higher-end rackmount NAS (RS1221RP+, TS-832PXU-RP) include dual power supplies. Redundant-power configurations can affect efficiency, but the additional draw is model- and load-dependent; use the chassis manufacturer's measured power data.
• Business electricity tariffs: Use the usage rate from the business electricity bill when calculating NAS running costs.

The Synology DS1525+ has 5 drive bays and is rated at 44.56 watts during access. The QNAP TS-664 has 6 drive bays and is rated at 44.02 W in typical operation with drives fully populated. Use your electricity rate to calculate running cost. The DS1525+ has a market price of about $1,719. For business deployments, purchasing from a specialist reseller rather than a consumer-focused retailer gives you access to genuine pre-sales guidance and a better warranty support pathway.

Further Reading

Power consumption is one factor in choosing the right NAS setup. For the full picture, these guides cover the decisions that surround a NAS purchase:

• Best NAS Australia 2026. Model recommendations across all use cases and budgets
• Synology NAS Australia. Full Synology ecosystem guide including model lineup and DSM features
• Synology vs QNAP. Head-to-head comparison of the two dominant brands
• NAS Remote Access and VPN Australia. Configure access to your NAS from outside your network
• Where to Buy a NAS in Australia. Retailer guide, price comparison tips, and ACL advice
• NAS vs Cloud Storage Australia. Total cost of ownership comparison including power costs
• 3-2-1 Backup Strategy. Protect your data with a proper backup architecture
• NAS RAID Explained. How RAID works, which level to choose, and what it protects against
• Best NAS Hard Drives Australia. IronWolf vs WD Red and other NAS-rated drive options
• What Is a NAS?. Start here if you are new to NAS

Use our free NAS vs Repurposed PC Cost Comparison to compare the cost of running an old PC as a NAS against buying a NAS.

Related reading: our Docker container power cost guide, our true cost of 10TB cloud storage, and our cloud egress fees in Australia.

Related reading: our NAS vs cloud 5-year cost comparison and our how long cloud backup takes on NBN.

Related reading: our NAS heat management for Australian summers.

See also: our complete Synology NAS Australia guide.

See also: our complete QNAP NAS Australia guide.

Related reading: our NAS vs cloud 5-year cost comparison.

Related reading: our NAS vs cloud 5-year cost comparison.

Related reading: our NAS vs cloud 5-year cost comparison.

How much does a NAS cost to run per year in Australia?

There is no single annual figure because the result depends on the NAS, drives, power state, schedule and electricity tariff. Synology rates the DS425+ at 6.10W during HDD hibernation and 28.25W during access. Enter the applicable wattage and the usage rate from your bill in the Power Calculator.

Does enabling HDD spin-down actually save money?

Yes, meaningfully so. A 4TB NAS HDD draws 3-5W when spun up and only 0.4-0.8W when parked and spun down. In a 4-bay NAS, configuring spin-down after 20 minutes of inactivity can save 10-16W during the 18-20 hours per day the NAS is typically idle. The trade-off is a 5-15 second delay when waking drives. Acceptable for most home use cases. Not suitable for surveillance NAS or constant-write workloads.

Is it cheaper to run a NAS with SSDs or HDDs?

It depends on your use pattern. SSDs draw 0.5-2W per drive versus 3-5W for HDDs when spun up, so SSDs use less drive power in this comparison. However, 4TB NAS SSDs cost considerably more than NAS hard drives; the Seagate IronWolf 4TB has a market price of about $352 and the WD Red Plus 4TB about $359. The four-drive upfront difference is not calculated because the SSD model is not specified. The electricity saving does not justify the price premium for most home users over a 5-year period. SSDs are worth it for write-heavy workloads, silent operation, or environments where reliability under vibration matters.

What size UPS do I need for my NAS?

Choose a UPS whose VA and watt ratings safely exceed the maximum connected load, then use the exact UPS model's manufacturer runtime chart or calculator to confirm the required runtime. Add your router and switch to the same UPS so network access is maintained during the outage. Use the NTKIT UPS Runtime Estimator to calculate your specific scenario.

How do WD Red Plus and Seagate IronWolf compare on power consumption?

WD Red Plus and Seagate IronWolf draw nearly identical power at equivalent capacities. The WD Red Plus 4TB WD40EFPX uses the read/write, idle and standby figures shown in the table above. Choose whichever is better priced or more readily available. Power consumption should not be a deciding factor between these two drives.

Does a NAS use more power with more hard drives installed?

Yes. Hard drives are the dominant power consumer in most NAS configurations. Each additional NAS HDD adds 3-6W active and 0.4-0.8W in standby. A fully populated 4-bay NAS draws roughly 12-20W more than the same NAS with no drives installed. This is why 8-bay NAS devices cost significantly more to run than 2-bay devices even with comparable CPUs. The drives account for most of the difference. For users who do not need 4 bays of capacity, a fully populated 2-bay NAS with high-capacity drives is more power-efficient than a partially filled 4-bay.

What is the most power-efficient NAS for home use in Australia?

Low-power 2-bay NAS devices offer low running consumption, and that includes low-power x86 models, not only ARM ones. Synology rates the DS225+, which is an Intel Celeron J4125 machine rather than an ARM one, at 6.08W during HDD hibernation and 16.98W during access. The QNAP TS-233 is an ARM model in the same efficiency class. Avoid additional bays unless you need their capacity.

Can I reduce NAS running costs with solar power?

Yes. For solar households, movable NAS workloads can be scheduled during periods of surplus generation so they use energy that might otherwise be exported. Scheduled backup jobs, media encoding and cloud sync tasks can be timed with Synology DSM's task scheduler or QNAP QTS task manager. On a time-of-use tariff, use the cheaper windows shown on your current plan and estimate the result with the Power Calculator.

Is it worth buying a NAS instead of using cloud storage to save power costs?

The economics depend on how much storage you need. Cloud cost depends on provider, service type, capacity tier, currency and retrieval terms; consumer sync storage and object-storage backup should not be treated as directly interchangeable. Compare the ongoing cloud fees with the NAS and drive prices, then estimate electricity with the Power Calculator. Any crossover point depends on the selected cloud service, NAS and drive costs, redundancy, backup requirements and ownership period. See the full analysis in the NAS vs Cloud Storage guide.

Does running a NAS 24/7 noticeably affect electricity bills?

For a 2-bay home NAS with drives configured to spin down, the impact depends on your tariff and time spent in each power state. A 4-bay NAS without power management uses more, so calculate it from the actual wattage and electricity rate. This is noticeable on a bill but not dramatic. Use the Power Calculator to check the rated wattage of any NAS you are considering against your electricity rate before purchasing.

Should I turn my NAS off when not in use?

For home users, a scheduled sleep window (e.g. 11pm-7am if no overnight backups run) is a good compromise. The NAS is available when needed but powered down during unused hours. Use the NAS's supported clean shutdown or power schedule rather than removing power abruptly. Whether daily shutdown is worthwhile depends on availability needs, backup schedules and the specific hardware. A scheduled sleep with a clean wake sequence is safer and more convenient. Most NAS devices support this via a built-in scheduler in DSM or QTS.

Does a NAS use electricity during backup jobs overnight?

Yes, and active power draw is significantly higher than idle. A DS425+ drawing 20W at idle spikes to around 28W during a sustained backup job with all drives active. For a mixed workload, calculate a weighted average from the time spent in each power state, then enter that wattage and your tariff in the Power Calculator. Time-of-use customers can schedule backups within a cheaper window shown on their current plan.