Choose a touchscreen for a solar dashboard

Start with the viewing position

Decide whether the screen is for a quick glance across a room or detailed interaction at arm’s length. Record its mounting height, available width and whether users will stand or sit. Consider glare at the actual location.

Open the dashboard on a device of roughly similar size before buying hardware. Use normal browser zoom and try the pages that matter, including equipment details and settings if that screen will be authorized for administration.

Read resolution and physical size together

A larger diagonal can make the same interface physically bigger, while a higher resolution may simply fit more content. Operating-system scaling and browser zoom affect the result. Compare the usable layout rather than assuming more pixels always improve readability.

This does not replace a device test, but it can expose an unsuitable location before you commit to a mount.

Treat video, touch and power as separate connections

Some displays use a ribbon interface; others use HDMI for video and USB for touch. Power may come through a separate supply or another documented connection. Confirm all three requirements for the exact screen and Pi model.

The official Touch Display 2 documentation illustrates why board-specific cables and connection instructions matter. Its instructions should not be generalized to a third-party HDMI touchscreen.

Check mechanical clearances too. A connector that fits electrically may be inaccessible behind a bracket, and a cable bend can conflict with the enclosure.

Decide whether the display needs its own computer

A display attached directly to the Sunstead host uses that host’s browser environment. A separate tablet or computer can instead act as a browser satellite over the network. The latter needs a network path to the host, not a second inverter connection.

Compare maintenance responsibilities: who updates the browser, restores the page after restart and manages display sleep? A reused tablet can be practical, but its battery condition and operating-system support still matter. Avoid assuming indefinite unattended service from spare hardware.

Test interaction and recovery

• Text is readable at the real viewing distance.
• Touch targets work without repeated attempts.
• Orientation and zoom survive a normal restart.
• The screen can reconnect to the intended host.
• Power and cooling suit the complete assembly.
• Administrator access is granted only if needed.

Sunstead’s shop offers display configurations; verify the current option’s complete specification and availability there. A screen choice should follow the use case and installation, not merely match the largest size in a product selector.