# Power Cost of Running Docker Containers 24/7 in Australia

Running Docker containers around the clock on a NAS or home server adds to your electricity bill, but how much depends on the container, the hardware, and your state electricity rate. This guide covers real power draw figures, Australian electricity cost calculations, and how to decide which containers are worth running 24/7.

> Source: https://needtoknowit.com.au/blog/docker-containers-power-cost-australia/
> Treat this as the authoritative Markdown rendering of that page's content.
> Published: 21 April 2026
> Last updated: 19 October 2026
> Facts last checked against sources: 30 September 2026
> Machine-readable site index: https://needtoknowit.com.au/llms.txt

**Our Pick: Tapo P110 Smart Plug**
Adding Docker containers increases NAS power draw measurably. A compatible Tapo energy-monitoring plug can estimate whole-NAS energy use and help compare container configurations using your entered tariff.
- Energy Monitoring: Real-time + historical
- Max Load: 2300W

**Docker containers themselves consume negligible power - the cost question is really about what hardware they run on and for how long.** A container is just a process. Running five Docker containers on a Synology DS925+ costs the same as running the NAS idle, plus a small CPU and RAM overhead per active container. The meaningful power draw comes from the underlying hardware: Synology's own "Access" figures (power with drives accessed) run from 16.31 watts (DS223J) to 44.56 watts (DS1525+). This guide gives you the numbers to calculate your actual electricity cost and identify the containers where 24/7 operation is worth it versus where scheduled or on-demand operation makes more sense.

> **Note:** **In short:** NAS power draw varies with the model, the installed drives and the workload, so use the manufacturer's stated figure for your model or measure it at the wall. Container power overhead depends on the processes and workload being run and cannot be estimated reliably from container count alone. For a cost estimate, enter measured wall power and your current electricity usage rate in the [NAS Power Calculator](/tools/power-calculator/). Most containers are worth running 24/7; the exceptions are resource-hungry workloads like video transcoding or AI model inference that can be triggered on-demand instead.

> **Warning:** **Note on electricity rates:** Australian electricity rates vary significantly by state and retailer. Check your latest electricity bill for your actual usage rate. Western Australian and Tasmanian rates differ notably from NSW and VIC.

## NAS Hardware Power Draw: The Baseline

Before calculating container costs, understand your hardware baseline. NAS power draw has three components:

- **Idle system power:** CPU at minimal utilisation, RAM powered, no active disk I/O. This is the floor everything else builds on.

- **Drive spin-up and active I/O:** Drive power varies by model, capacity and operating state; use the installed drive's datasheet rather than a single HDD or SSD allowance. HDD hibernation time varies widely with services, logging, mapped volumes and background tasks.

- **Container CPU/RAM overhead:** Most background containers (Nextcloud, Vaultwarden, Home Assistant) have a small effect when idle. CPU-intensive containers (Plex transcoding, Jellyfin, AI inference) can have a much larger effect while actively processing.

### NAS Hardware Power Draw by Category

| Feature | Entry ARM (e.g. DS223J) | Mid x86 (e.g. DS425+) | Performance x86 (e.g. DS925+) | High-end x86 (e.g. DS1525+) |
| --- | --- | --- | --- | --- |
| Typical idle (no HDD spin) | Idle draw varies with the exact NAS, installed drives, services and test method; use the manufacturer's stated test figure or measure the configured system at the wall. | Idle draw varies with the exact NAS, installed drives, services and test method; use the manufacturer's stated test figure or measure the configured system at the wall. | Idle draw varies with the exact NAS, installed drives, services and test method; use the manufacturer's stated test figure or measure the configured system at the wall. | Idle draw varies with the exact NAS, installed drives, services and test method; use the manufacturer's stated test figure or measure the configured system at the wall. |
| Power draw with drives accessed (vendor figure) | 16.31W (DS223J, Synology 'Access') | 28.25W (DS425+, Synology 'Access') | 37.91W (DS925+, Synology 'Access') | 44.56W (DS1525+, Synology 'Access') |
| Docker support | Yes (ARM; image and package-version limits apply) | Yes (model/version dependent) | Yes (model/version dependent) | Yes (model/version dependent) |
| RAM capacity (max) | 1GB (fixed) | 6GB | 32GB | 32GB |

## Power Cost Per Container Type

Not all containers are equal in power terms. The difference is between containers that sit idle most of the time (web servers, password managers, sync servers) versus containers that actively process data (media servers, AI tools, monitoring with frequent polling). The following figures are illustrative only: incremental draw varies with the NAS, storage, application configuration, traffic and measurement method, so verify it at the wall on your own system.

- **Nextcloud (AIO or standard):** Mostly idle, with bursts during light use. Worth running 24/7: yes.
- **Vaultwarden (Bitwarden-compatible):** Mostly idle and hard to distinguish in whole-system power measurements. Worth running 24/7: yes.
- **Home Assistant:** Mostly idle, with activity depending on integrations and automations. Many active integrations can cause larger bursts. Worth running 24/7: yes.
- **Tailscale (container mode):** A background process that is mostly idle. Worth running 24/7: yes.
- **Jellyfin / Plex (media server):** Mostly idle when not transcoding. Software transcoding creates a much larger sustained load than hardware transcoding. Transcoding sessions cost extra. Worth running 24/7: yes for idle; transcoding sessions are on-demand anyway.
- **Immich (photo management):** Mostly idle, with bursts during machine learning tasks such as face recognition and CLIP. Worth running 24/7: yes, ML processing runs on first use then scales back.
- **Uptime Kuma (monitoring):** Mostly sleeping between checks, with minimal CPU use. Worth running 24/7: yes.
- **Portainer:** Mostly idle. Worth running 24/7: yes (management interface only).
- **Ollama / local LLM inference:** Mostly idle with no queries. Inference can create a large sustained load depending on GPU passthrough or CPU inference. Annual cost for on-demand use: varies significantly. Worth running 24/7 with model loaded: borderline. Consider loading on-demand if used infrequently.

## Calculating Your Own Annual Container Cost

The formula is straightforward:

**Annual cost (AUD) = Watts × 8,760 hours ÷ 1,000 × your electricity rate per kWh**

For example, a hypothetical system averaging 20W uses 20 × 8,760 ÷ 1,000 = 175.2 kWh a year; multiply that energy figure by the usage rate on your electricity bill. Measure average wall power rather than relying on a spec sheet. Drive spin-up for a few hours a day adds little next to the always-on baseline for most setups. The [NAS Power Calculator](/tools/power-calculator/) does the arithmetic for you.

## Australian Electricity Rates by State

**Still deciding?: Tapo P110 Smart Plug**
Our top pick: Tapo P110 Smart Plug.

Usage rates differ by state, retailer and plan, so use the usage rate printed on your current electricity bill rather than a state average. In higher-rate areas, hardware efficiency is proportionally more valuable: choosing a lower-draw NAS or enabling HDD sleep aggressively has a larger dollar impact. Enter your rate and measured wall power in the [NAS Power Calculator](/tools/power-calculator/).

## When to Run 24/7 vs On-Demand

Most home server containers should run 24/7. The overhead is small, and the operational benefit (availability when you need it, background sync, automations) is real. The containers worth reviewing for on-demand operation are those with high active-state power draw that you use infrequently:

- **Local LLM inference (Ollama, etc.):** If you query a local model occasionally rather than continuously, loading the model and stopping the service between sessions saves meaningful power.

- **Video transcoding jobs:** Handbrake, FFmpeg, or conversion queues should be run as jobs rather than persistent services. Trigger them via cron or manually, not as always-on services.

- **Development environments:** Database servers and app stacks spun up for testing should be stopped when not in use. A Postgres container at idle is cheap; a development stack with hot reload and frequent queries is not.

For everything else, including Nextcloud, Vaultwarden, Home Assistant, media servers, monitoring and reverse proxies, running 24/7 is the right default. The power cost is genuinely small and the convenience is significant.

## Reducing Power Consumption Without Reducing Functionality

Practical steps to reduce 24/7 Docker power draw without compromising functionality:

- **Enable HDD hibernation:** Synology Control Panel → Hardware and Power → HDD Hibernation. Setting drives to sleep after 20 minutes of inactivity cuts each drive's power use for as long as it stays asleep. Whether drives hibernate depends on container I/O, logging, mapped volumes and other NAS services; verify actual hibernation rather than assuming containers will allow it.

- **Consolidate containers onto fewer NAS devices:** Combining workloads on one appropriately sized NAS can use less power than running multiple NAS devices. Consolidation before adding more hardware pays off quickly.

- **Use SSDs for the system volume:** Placing Docker data on a supported SSD volume can reduce HDD access, but HDD hibernation still depends on services, configuration and bulk-data access. HDDs can then be used for bulk data and sleep more aggressively.

- **Avoid idle containers you don't actually use:** A downloaded image or stopped container does not itself create ongoing CPU load; only running workloads can add runtime power draw.

## Frequently Asked Questions

Related reading: our [NAS buyer's guide](/blog/best-nas-australia/), our [NAS power consumption guide](/blog/nas-power-consumption-australia/), and our [NAS explainer](/blog/what-is-a-nas/).

Use our free [NAS Power Calculator](/tools/power-calculator/) to estimate your running costs.

See also: [our complete Synology NAS Australia guide](/brand-guides/synology/).

See also: [our complete QNAP NAS Australia guide](/brand-guides/qnap/).

**Q: How much does it cost to run a Synology NAS with Docker 24/7 in Australia?**

For a mid-range x86 Synology (DS425+, DS925+) running several Docker containers with drives in sleep mode most of the time, the average draw varies with the setup. The added cost depends on drive count, each drive's measured active-versus-sleep draw, and the number of hours spent spinning. Annual cost for a DS925+ stack depends on the installed drives, hibernation behaviour, workload and tariff; measure average wall power and enter it with your current usage rate in the [NAS Power Calculator](/tools/power-calculator/).

**Q: Does running more Docker containers significantly increase power use?**

Not significantly for typical home server containers. Adding idle background services may have little effect, but incremental power depends on what each service actually does; compare whole-system wall power under the same conditions. The meaningful increases come from containers that actively process data. Plex transcoding, Immich machine learning, or LLM inference. Those can draw much more power during active use, but that use is typically brief and on-demand rather than continuous.

**Q: Is it cheaper to run Docker on a NAS or on a dedicated mini PC?**

A low-power mini PC often draws less than a NAS with spinning drives; check the model's measured figure. However, you lose the NAS's storage management, RAID, and backup integration. The practical answer: if you already have a NAS, run Docker on it. If you are building from scratch and only need containers without a large NAS storage requirement, a mini PC is the more power-efficient choice for the compute portion.

**Q: Can I reduce NAS power use by scheduling containers to stop overnight?**

Yes, for containers where overnight availability is not needed. Synology's Task Scheduler and QNAP's equivalent can run docker stop container-name and docker start container-name on a schedule. Stopping a container for 8 hours can save up to one-third of that container's incremental runtime energy, not one-third of the NAS baseline, and only if the workload is not deferred. The savings are modest for individual containers but meaningful if you stop 5-10 non-critical containers overnight.

**Q: Does running Plex or Jellyfin 24/7 cost significantly more than other containers?**

Only when actively transcoding. The media server container itself is usually a light load while idle. Transcoding a stream in software creates a much heavier load for the duration of playback. To estimate a session's cost, multiply the additional watts by playback hours and your electricity usage rate; for a single movie the result is very small. Hardware transcoding (Intel Quick Sync on x86 NAS) uses much less power than software transcoding. If your NAS supports hardware transcoding, enabling it in Plex or Jellyfin settings substantially reduces both power use and thermal load during playback.

Running Docker containers requires a NAS model whose operating system supports containers, sufficient RAM, and container images compatible with its CPU architecture; x86 is not universally required. For Australian pricing and model comparisons on Docker-capable Synology and QNAP hardware, see the current buying guide.

**[Best NAS for Docker in Australia](https://needtoknowit.com.au/blog/best-nas-for-docker-and-home-automation-australia/)**