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Raspberry Pi 5 (4GB or 8GB)
The fastest Raspberry Pi yet, perfect for running Home Assistant with plenty of headroom for add-ons and future growth.
Check Price on AmazonWhy Pi 5 for Home Assistant?
The Raspberry Pi 5 launched in late 2023 and immediately became the most capable Pi ever made. With a new quad-core Cortex-A76 CPU (roughly 2–3× faster than the Pi 4's Cortex-A72), PCIe 2.0 connectivity for NVMe SSDs, and improved power delivery, it's a significant generational leap — and it makes an excellent Home Assistant server.
Many HA users are still running Pi 3s or Pi 4s. If that's you, the jump to Pi 5 is dramatic. Dashboards load faster, automations execute with less latency, and demanding add-ons like Frigate (AI camera processing) become far more viable. If you're starting fresh, Pi 5 is the obvious choice.
What You Need
- Raspberry Pi 5 (4GB is fine for most; 8GB if running Frigate or many add-ons)
- Official Pi 5 power supply (27W USB-C — the Pi 5 needs more current than older Pi models)
- MicroSD card (A2 rating, 32GB minimum) — or an NVMe SSD via a Pi 5 HAT+ (strongly recommended)
- Pi 5 case — the Pi 5 runs hot without cooling; use an active cooler or a case with a fan
- USB Zigbee coordinator (e.g., Sonoff Zigbee 3.0 USB Dongle Plus) if you use Zigbee
Installing Home Assistant OS
Installation is straightforward with the official Raspberry Pi Imager tool:
- Download Raspberry Pi Imager from raspberrypi.com on your PC or Mac.
- Insert your microSD card or connect your SSD via a USB adapter.
- In Imager, choose "Other specific purpose OS" → "Home Assistants and home automation" → "Home Assistant OS".
- Select the Raspberry Pi 5 variant when prompted.
- Flash the image to your storage device.
- Insert the SD card (or connect the SSD) into your Pi 5 and power it on.
- On your network, navigate to
http://homeassistant.local:8123after 5–10 minutes. If that doesn't work, find the Pi's IP address from your router and use that instead. - Complete the onboarding wizard to create your account and set up your home.
That's genuinely all there is to it. Home Assistant OS is a purpose-built, immutable Linux distribution that handles everything else automatically — you don't need to configure the operating system at all.
Performance: Pi 5 vs Pi 4
We ran both boards with identical Home Assistant configurations (same integrations, same add-ons, same database size) and compared key metrics:
| Metric | Raspberry Pi 4 (4GB) | Raspberry Pi 5 (4GB) |
|---|---|---|
| HA OS Boot Time | ~45 seconds | ~28 seconds |
| Dashboard Load (cold) | ~3.2s | ~1.8s |
| Automation Execution | ~180ms avg | ~95ms avg |
| Add-on Install Time | Baseline | ~30% faster |
| Idle CPU Usage | ~5–8% | ~4–6% |
| Idle Temperature | ~45°C | ~52°C (needs cooling) |
| Power Consumption | ~3–5W | ~5–10W |
The Pi 5 is meaningfully faster across the board. For everyday use, the dashboard responsiveness improvement alone makes it worthwhile. The higher temperature and power consumption are the trade-offs — adequate cooling is not optional on the Pi 5.
Storage: SSD vs SD Card
This deserves its own section because it matters enormously. Home Assistant's recorder creates continuous database writes. Standard microSD cards — even good A2-rated ones — degrade under this workload over 1–2 years and eventually fail, taking your HA config with them.
The Pi 5 introduces PCIe Gen 2 connectivity via its FPC connector. Combined with a Pi 5 HAT+ that adds an M.2 NVMe slot, you can boot directly from an NVMe SSD. This transforms HA performance and longevity:
- Database operations are 5–10× faster than SD card
- NVMe SSDs have dramatically higher write endurance than SD cards
- Boot time drops to under 20 seconds
- No more SD card failures to worry about
Our recommendation: buy a Pi 5 HAT+ (Pimoroni or official Pi HAT+), a 250GB NVMe SSD (Samsung 980, WD SN770, or similar), and never look back. The total cost addition is $40–60 and it's absolutely worth it for a permanent HA installation.
Optimization Tips
- Use active cooling — The official Pi 5 active cooler or a case with a fan keeps temperatures under control and prevents thermal throttling.
- Enable the Recorder purge — Set
purge_keep_days: 7in your recorder config to limit database growth. - Use MariaDB for the recorder — The MariaDB add-on outperforms the default SQLite database at scale.
- Set up automatic backups — Use HA's built-in backup feature to a NAS or cloud storage. With HA's restore functionality, recovering from hardware failure takes minutes.
- Stick to Ethernet — Wi-Fi works, but wired Ethernet is more reliable for a server that runs 24/7. The Pi 5 has Gigabit Ethernet.
- Extension USB cables for Zigbee dongles — USB 3.0 interference can disrupt 2.4GHz Zigbee signals. Use a short USB 2.0 extension cable to position your Zigbee dongle away from the Pi.
Is It Worth It? Absolutely.
The Raspberry Pi 5 is the best value option for a DIY Home Assistant server in 2025. Pair it with an NVMe SSD and active cooling, and you get a snappy, reliable HA installation that will serve you for years. It's noticeably faster than the Pi 4 in real-world use, handles demanding add-ons with ease, and costs around $60–80 for the board itself. Highly recommended.
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