Power a Home Assistant wall tablet with PoE: USB-C picks

A tablet on the wall should look like a dashboard, not a charger demonstration. PoE puts the long cable out of sight: Ethernet brings power to the mount, and a small adapter turns it into USB-C charging beside the tablet. Your lights, cameras and heating controls get a permanent home without a trailing mains lead.

Choose the PoE Texas Gigabit 25 W adapter for the more flexible USB-C power-and-data route. Choose its compact 10 W adapter for a lower-power panel. If you need a switch too, the NETGEAR GS305EP supplies PoE+ and gives you individual port controls. The important shopping detail is the USB power profile, not the biggest wattage on the box.

Adapter and charging specifications come from the makers; the power comparisons below are calculated ratings, not measured tablet consumption.

Quick picks

• Best data-capable adapter: PoE Texas Gigabit PoE+ to USB-C, 25 W. Its USB 3.0 data path makes sense when you want to explore wired Ethernet on a compatible tablet, alongside USB-C Power Delivery.
• Compact lower-power option: PoE Texas 802.3af to USB-C, 10 W. Its integrated right-angle cable helps with a neat mount, and its 5 V, 2 A profile suits a modest charging requirement.
• Small managed switch: NETGEAR GS305EP. Four PoE+ ports, a 63 W shared budget and local web management make it useful for a dashboard plus other PoE equipment.

Start with the Home Assistant dashboard tablet and mount guide if you still need the screen. For more projects to put on it, visit the Home Assistant hub.

What you’re buying: PoE in, USB-C out

The switch supplies Ethernet and power; the adapter separates them and negotiates USB-C charging with the tablet. 802.3af and 802.3at describe the Ethernet power input. USB Power Delivery describes the conversation at the tablet end. Both sides have to fit.

Adapter	PoE input	Published USB-C output	Data path	Choose it for
PoE Texas Gigabit 25 W	802.3at PoE+	Multiple PD profiles; 5 V × 2.6 A at the lowest voltage	Gigabit Ethernet input; USB 3.0 output through USB-C	A flexible power-and-data installation
PoE Texas compact 10 W	802.3af	5 V × 2 A PD profile	10/100 Mbps through USB-C	A smaller, lower-power panel

Sources: PoE Texas Gigabit adapter manual and compact adapter manual.

A USB-C connector alone tells you very little about charging. Some splitters deliver a fixed 5 V; some offer a barrel connector rather than USB-C. Neither becomes a multi-voltage PD charger just because you add a different cable. Buy the output your tablet needs, then make the cable tidy.

Does it have enough power for your tablet?

The Gigabit adapter is marketed as 25 W, but its manual lists different current limits at different voltages. At 5 V, its 2.6 A profile computes to 13 W, not 25 W. Its other published profiles compute to 16.02 W at 9 V, 16.08 W at 12 V, 20.55 W at 15 V and 23 W at 20 V. The tablet selects a mutually supported profile; a higher-voltage option is useful only when the tablet accepts it.

For the Lenovo Tab M11, Lenovo’s specification sheet specifies a compatible USB PD charger delivering 10 W minimum, with 15 W for fastest charging. For the 2023 Fire HD 10 family, Amazon’s launch announcement lists a 9 W included charger.

Here’s the useful arithmetic at the adapters’ 5 V profiles:

Charging comparison	Gigabit adapter: 13 W profile	Compact adapter: 10 W profile
Difference from Lenovo M11’s 10 W minimum	+3 W	0 W
Difference from Lenovo M11’s 15 W fastest-charging rating	−2 W	−5 W
Difference from the 2023 Fire HD 10 family’s 9 W included charger	+4 W	+1 W

These differences compare published charging ratings. They don’t tell you how much power the screen uses, or guarantee that the tablet will draw the adapter’s full current. The Fire figure applies to that published tablet family, so match your own generation’s charging specification.

For an M11, start with the Gigabit adapter. It offers more room at 5 V than the compact unit and additional voltage profiles. Treat 15 W charging as something to establish with your exact pairing, rather than assuming the 25 W headline delivers it. For an existing Fire panel with a modest charging requirement, the compact adapter is a sensible candidate; run the screen-on check below before mounting it permanently.

Power and wired data are separate decisions

Both shortlisted adapters can carry network data through USB-C, but the tablet needs support for the adapter’s USB Ethernet hardware. The maker’s manuals cover compatible devices and Android caveats; buy the Gigabit version for its data capability, then establish support on your exact tablet and software.

Wi-Fi is a perfectly useful fallback. You can use PoE to get power to the wall while the dashboard connects over Wi-Fi. That still removes the visible charger. A genuinely power-only splitter also follows this pattern: Ethernet powers the adapter, USB-C charges the screen, Wi-Fi carries Home Assistant.

The Lenovo M11’s port is USB-C 2.0. A Gigabit input on the adapter doesn’t turn that tablet into a Gigabit endpoint. For a dashboard, focus on a stable connection and charging behavior before chasing a link-speed badge.

If wired data works, try it with the screen locked as well as awake. Then disconnect Wi-Fi briefly and load a dashboard control to establish which path is actually carrying traffic. Re-enable Wi-Fi afterwards if you want it available for recovery.

Pick the switch before you fill the wall

The NETGEAR GS305EP datasheet specifies 30 W per PoE+ port and a 63 W total budget. It is fanless, uses local browser management and supports VLANs. That makes it a practical small-switch partner for the 802.3at adapter. Sharing the switch with wireless gear? Our Omada vs UniFi PoE access-point guide covers the AP side of the plan.

For conservative planning, reserve the full 30 W port allowance for each PoE+ adapter: one leaves 33 W of the shared budget; two reserve 60 W and leave 3 W. Three such reservations would require 90 W, beyond this switch’s budget. Those are planning allocations, not a claim that a tablet consumes 30 W.

Already powering cameras? Add their requirements before you commit the next port. Our PoE switch guide for Frigate cameras walks through both per-port limits and the shared budget. A spare socket and spare power are two different things.

Set it up: one cable to the wall

1. Lay it out on a table first. Connect a PoE-enabled switch port to the adapter, then USB-C to the tablet. Use an active 802.3af/at source matching the adapter, rather than guessing with a passive injector.
2. Open your finished dashboard. Use the same screen brightness, camera tiles and kiosk settings you intend to keep. A nearly blank setup screen makes a poor dress rehearsal.
3. Watch the battery trend. Start below full charge and leave the dashboard running through a normal day. If the battery keeps falling, solve the power profile, cable or screen-load issue before installing the mount. This is your commissioning test, not a reason to hide the problem with a bigger percentage icon.
4. Try the recovery path. Reconnect the USB-C cable and restart the tablet. Make sure charging returns and your dashboard opens again. If you want Ethernet, test it with Wi-Fi disabled too.
5. Route the Ethernet and mount the adapter. Leave access to connectors and enough slack to remove the tablet without yanking its socket. Check that the right-angle plug clears the mount.
6. Finish the wall panel. Secure the tablet, verify charging once more and label the switch port. A future reboot is much easier when the correct port has a name.

Give the adapter room to breathe

Plan an accessible, ventilated low-voltage space, not a sealed pocket packed with insulation. Have a qualified installer handle an in-wall cable route and keep it separate from mains wiring. The cable can disappear; the adapter should remain serviceable.

The compact adapter’s maker manual specifies an operating temperature range of −10 to 60°C. That’s an ambient operating limit, not a target for the tablet’s battery or a measured temperature behind your mount. Use each model’s installation instructions for its enclosure and leave its heat path clear.

When you do the screen-on test, include the final mount position and the room’s usual heating. If the tablet or adapter reports a temperature warning, change the installation. Don’t finish the trim and hope winter will do the cooling for you.

Keep the dashboard ready without living at 100%

Start with the tablet’s own battery-protection or charge-limit feature when available. The dashboard guide’s charging section covers the panel and kiosk side of this job.

Managed PoE adds another lever, but don’t schedule the whole switch off to stop one tablet charging. Your cameras or access point may be using it too. If you experiment with individual port power control, remember that the tablet’s wired-data adapter can disappear along with its charging supply. Test reconnection and dashboard recovery before making that routine automatic.

Keep the tablet removable. Cleaning the connector, replacing a cable or changing the battery strategy should be a small job, not a wall repair.

The pick

Buy the PoE Texas Gigabit adapter for the more flexible wall-panel installation; use the compact 10 W model when your panel’s charging requirement fits. Pair either with the GS305EP when you need a small managed PoE+ source. Match the USB power profile, establish the data path, and pass the screen-on battery test before the mount goes up. Then enjoy the fun part: a dashboard that looks like it belongs on the wall.