Power Goes Out and the POS Goes Dark — How to Keep Orders Safe and Operations Running

Panic That Can Be Prevented

Power goes out. POS screen goes dark. Printer dies. Music stops. Customers in line stare at a cashier who's just as lost. It's a nightmare scenario — but with the right preparation, the impact can be drastically minimized.

In many regions, power outages — both scheduled and unexpected — are a reality you have to face. The question isn't whether it'll happen, but whether you're ready when it does.

What Happens to Your Data

This is the biggest worry: does transaction data get lost? The answer depends on timing:

• Completed transactions (paid and recorded): Safe. Data is already stored in the database. A power outage doesn't delete committed data.
• In-progress transactions (not yet submitted): These are at risk. Orders entered but not yet submitted may be lost since they're in temporary memory.

That's why the basic principle is: complete every transaction as quickly as possible. Don't leave orders sitting on screen unprocessed.

Emergency Procedure When Power Goes Out

First 0-30 seconds: Stay calm. Don't panic. Calmly tell customers: "Power's out. Paid orders are safe. Give us a moment to handle this."

Check if the POS is still alive. If your tablet has a battery (most do), the POS might still be running even though the power is out. Check — if it's still on, continue operating on battery.

Is internet still up? WiFi routers need power. If power's out, WiFi is out too. But if your tablet can use mobile data (tethered from a phone), connectivity can continue.

If POS is completely dead: Switch to temporary manual mode. Record orders on paper — table name/number, items, amounts, payment method. Enter them into the POS once power returns.

Manual Mode: Doing It Right

Keep at the register area:

• A small notebook and pen (always available, not in the storeroom)
• A simple calculator (or a phone with battery)
• A printed price list (not just in the POS — this backup is important)

Manual record format:

• Order time
• Items and quantities
• Total price (calculated manually)
• Payment method (cash/QR) and amount received

After power returns, enter all manual transactions into the POS. This is important to keep daily reports accurate.

Prevention

UPS (Uninterruptible Power Supply). This device provides backup power for several minutes when power goes out — enough to complete in-progress transactions and save data. Prices start around Rp 300,000-500,000 for a small UPS. A small investment that can prevent data loss.

Keep the tablet charged. A tablet at 5% battery when power goes out = a tablet that dies within minutes. Keep charge above 50% during operations.

Backup internet connection. WiFi dies when power goes out. Phone tethering can be a backup — make sure there's a phone with data quota on standby.

Printed price list. One A4 sheet with all items and prices. Laminate it and post it near the register. This is a lifesaver when the POS is down and you need to calculate manually.

After Power Returns

1. Turn on all devices — POS, printer, router
2. Check that the POS is running normally and pre-outage data is still there
3. Enter manual transactions that occurred during the outage
4. Do a quick reconciliation — match cash in the drawer with manual records + POS

Perspective

A power outage is inconvenient, not catastrophic — if you have a procedure. A cafe with a contingency plan can keep operating (albeit slower) and not lose data. One without? Operations stop completely, the line disperses, and that day's reports are a mess.

The investment is small: a UPS, printed price list, a notebook, and 10 minutes of team training. The return? Peace of mind and operations that don't collapse when the unexpected happens.