Solution · 05
300 kWh a year — a number you can see.
A solution page sales can quote to a hotel as it stands.
The situation
The air conditioning runs in an empty room.
The card slot was meant to save energy, but once guests use a piece of paper or a business card instead, the room goes back to permanent power — and the saving is gone.
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A piece of paper instead of a card, and the saving is worthless
The card slot was meant to save energy, but it swaps the real question — is anyone in the room — for a fake one: is a card in the slot. Leave the card behind at checkout, or use a piece of paper instead, and the room goes back to permanent power. Our answer is to change the test: not the card, the person.
The norm
A hotel tracks a room’s electricity closely, yet can do nothing about an empty room burning power — because it happens after the guest has left.
Pain points
Paper in the slot
Any stiff card works, so the whole logic is bypassed.
Card left behind
The guest goes out and the lights and air conditioning stay on.
Nothing measured
How much was saved, nobody knows — and nobody can be held to it.
Our solution
Presence takes over, and the data is there.
Presence sensing decides whether the room really has someone in it, and the networked policy cuts the power accordingly. Usage and savings per room are visible in the LMC.
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Every room’s usage and saving shows up in the LMC
Presence sensing decides whether the room really has someone in it, and the networked policy cuts the power. Usage and savings for every room and every period go into the LMC platform, comparable by room type and by month. Saving is not a slogan — it can only be signed off once the data is there. Around 300 kWh per room per year is the typical figure; actual results depend on site conditions.
Advantages and differences
| Item | The usual way | LOCK.LINK |
|---|---|---|
| How power is drawn | Card slot (a paper slip defeats it) | Presence sensing + networked policy |
| Empty-room draw | Power stays on | Cuts off automatically |
| Measured result | No data | Per room, inspectable |
| Retrofit cost | Rewiring needed | 86-type box, replaced in place |
Ultra-low power
Four AA batteries, two years.
The LS02 auto silent lock body is rated at 20 open/close cycles a day and runs ≥2 years. It draws less than a traditional hotel proximity lock — batteries are changed in years, not months.
| Metric | Figure | Note |
|---|---|---|
| Standalone standby | 20 μA | Best in the industry |
| Networked standby | 26 μA | Persistent BLE link |
| Per card unlock | 50 μAh | — |
| Per phone unlock | 27 μAh | Phone scan or tap to open |
| Daily total (card) | 1.5 mAh | 20 unlocks in 24 h, standby included |
| Daily total (phone) | 1.3 mAh | 20 unlocks in 24 h, standby included |
| Battery life | ≥2 years | Four AA cells, 20 cycles a day |
There is also a low-battery warning, raised early enough that nobody is suddenly locked out.
Specs and FAQs
The guest-room energy-saving solution takes over a guest room’s power using presence sensing (infrared and microwave): the room powers up as the guest enters and cuts off after a delay when they leave, ending the hidden waste of a forgotten card and air conditioning in an empty room — around 300 kWh saved per room per year, visible over the network.
- Sensing
- Infrared + microwave
- Presence, not motion
- Saving
- ≈300 kWh / year · room
- Derived from PMS data
- Cut-off delay
- Adjustable · 30 s default
- Off automatically on leaving
- Guest action
- Nothing to learn
- Power on entry
- Networked metering
- Visible in the LMC
- Verified with data
- Installation
- 86 box, in place
- Mostly no rewiring
Card-slot power vs LOCK.LINK occupancy saving
| Item | Traditional card slot | LOCK.LINK occupancy saving |
|---|---|---|
| How power is drawn | Card in the slot | Presence sensing, no card |
| Empty-room draw | Burns power if the card stays in | Off automatically on leaving |
| The logic | The card decides | Infrared + microwave judge presence |
| Result | Depends on guest habit | About 300 kWh / year · room |
| Operational data | None | Networked, measurable and tunable |
Common questions
If a guest lies still, will it cut the power by mistake?
No — it uses presence sensing (infrared and microwave), which still detects a person who is still or asleep, so it does not cut off by mistake.
Where does the 300 kWh a year come from?
It is derived from PMS order data: a room is open 19.6 hours a day while the guest is in it for 11.2, which at 70% occupancy leaves roughly 1,022 idle hours a year — about 340 of them with air conditioning running — corresponding to over 300 kWh of avoided cost per room per year. Once networked, real per-room metering can check it; the figure is deliberately conservative.
Is it hard to retrofit older rooms?
An 86-type back box is replaced in place and most standard rooms need no rewiring; the specifics depend on the boxes and wiring on site.
Can it connect to our existing room control?
It can reach the LMC platform through a LOCK.LINK gateway, or be integrated with your existing room control / PMS on a project basis.