What hardware should i chose?

Which device to install Home Assistant on?

Home Assistant is an open-source system, which gives us incredible freedom – we can install it on almost any hardware, from an old laptop lying in a drawer to dedicated servers. Below, I will introduce you to the most popular options, their pros and cons, so you can make an informed decision.

1. Home Assistant Green – Out-of-the-box for everyone

This is the official device from the system creators (Nabu Casa). If you don't want to deal with "custom builds" and want a Plug & Play solution, Green is for you.

• What's inside? An energy-efficient 4-core ARM processor, 4 GB of RAM, and 32 GB of fast eMMC memory. (MicroSD is used for system recovery).
• Capabilities: It has 2 USB ports for connecting dongles (e.g., Zigbee/Z-Wave) and gigabit Ethernet.
• For whom? Perfect to start. It will handle a standard home with dozens of sensors and automations. It is silent and consumes next to no power.

2. Home Assistant Yellow

Yellow is the older but more advanced brother of the Green. This device was designed for users who want absolutely everything in one case, without pendrives and cables sticking out of the back.

• Integrated radio: Yellow has a built-in module supporting Zigbee 3.0 and Matter (Thread). You don't have to buy separate USB gateways.
• Expansion: What sets it apart is the slot for an NVMe SSD drive. You can forget about memory limitations and enjoy lightning-fast database performance.
• PoE Power: Some versions support Power over Ethernet – you can power the server with the same cable you use for the internet.
• For whom? For people who want a professional, integrated solution.

3. Raspberry Pi – A classic with one flaw

This is the most popular microcomputer in the world, which most of us started with. Performance-wise (especially model 4 or 5), it beats many dedicated solutions, but it has one "Achilles' heel."

• SD Card: Most users install the system on microSD cards. Home Assistant writes data very intensively (logs, databases), which can "wear out" an SD card in a few months, leading to a sudden system failure.
• Advice: If you choose the "Pi," be sure to buy a case with SSD support or use a USB-SATA adapter. This will make your system more resistant to potential failures.

4. Other hardware – The magic of Open Source

If you have an old terminal at home (e.g., Dell Wyse, HP T630), a laptop with a damaged screen, or a modern NAS server, you can breathe new life into them. Here, you are limited only by your imagination, but it's worth remembering a few golden rules:

• Appetite grows with eating: At the beginning, you don't need much. However, when you start adding cameras, face recognition (e.g., Frigate), or advanced multimedia, you will quickly feel the lack of power. It's better to have a slight reserve of RAM (minimum 4GB, recommended 8GB+).
• Energy consumption (Crucial!): Remember that this server runs 24/7, 365 days a year. An old PC might consume 50-100W, while a dedicated terminal or MicroPC will settle for 5W. Over a year, the difference in electricity bills can be up to several hundred euro!
• Reliability and cooling: Choose solutions that can work under load without overheating. Passive cooling (no fan) is a huge plus – no noise and no dust inside.
• Component replaceability: The ability to easily swap the drive for a larger one or add RAM sticks is a huge advantage of x86-type solutions (terminals/PCs) over ARM microcomputers.

5. Don't limit yourself to one device!

The power of HA is flexibility and freedom of configuration. You don't have to push everything into one machine. You can have the main HA server on an energy-efficient terminal, and a heavy database or video monitoring system on a more powerful server. Such a distribution of load means that if one service fails, the rest of the house (e.g., lights and heating) still works.

A short conclusion at the end:

If you want to start without stress and "right now" - choose Green. If you want hardware that you can modify or want to optimize costs a bit - look for a used x86 terminal or a new micro PC with an Intel N100 processor (or similar).