How to Run a Retail Store During Power Cuts

Why power cuts are a business continuity problem

When EDH cuts power to your neighborhood, the immediate problem is obvious: lights go out, refrigerators stop cooling, and electronic equipment stops working. But for a retail business, the cascade of problems goes much deeper. Your POS device runs on battery, but for how long? Your internet router goes down when its backup battery dies. Your receipt printer needs power. Your fans or air conditioning stop, making the store uncomfortable for customers and staff. Your refrigerator stops cooling perishable goods. And if the power cut extends into evening hours, you cannot operate in the dark.

In Haiti, power cuts are not random events — they follow predictable patterns. EDH publishes load-shedding schedules, and most business owners know roughly when power will be available and when it will be cut. The problem is that the schedule changes frequently, and unscheduled cuts happen when equipment fails or generation drops. A business that is prepared for scheduled cuts can also handle unscheduled ones with minimal disruption.

The key to surviving power cuts is separating your essential business operations from grid electricity. Your POS system should run on battery power for a full shift. Your lighting should have a backup source. Your internet should have a failover option. And your inventory — especially perishable goods — should be protected from temperature swings. This guide walks through each of these areas.

Choosing a POS system that works during power cuts

The most important decision for power cut resilience is your POS system. A POS that depends on a constant internet connection or a server in your store will fail when the power goes out because your router will lose power and the internet will drop. Even if you have a generator, most small retailers do not run it for every EDH outage due to fuel costs.

Vendrex is designed for this scenario. It runs on an Android tablet or phone with a built-in battery that lasts a full business day. It works entirely offline — no internet connection is needed for transaction processing, barcode scanning, receipt printing, inventory management, or customer lookup. You charge the device when power is available, and it runs on battery during outages. An Android tablet with a 6,000-8,000 mAh battery can easily handle 8-10 hours of continuous POS operation on a single charge.

For stores that experience daily power cuts, we recommend keeping two fully charged devices. When the first device's battery runs low, switch to the second and charge the first when power returns. This rotation keeps you selling through even the longest outages without interruption.

Power backup options for your store

While your POS device runs on its own battery, other equipment in your store may need backup power. Here are the most practical options for Haitian retailers:

Power banks for small devices. A high-capacity power bank (20,000 mAh or more) can recharge your tablet or phone 2-3 times during an extended outage. Power banks are affordable (G1,500 to G5,000 depending on capacity), widely available in Port-au-Prince, and require no installation. Keep one charged and accessible at the checkout counter. When your tablet battery runs low, plug it into the power bank while continuing to process sales.

Inverters for essential equipment. A small inverter (500-1000 watt) connected to a car battery can power your receipt printer, a few LED lights, and charge devices for several hours. This is a cost-effective solution that costs significantly less than a generator and requires minimal maintenance. Many hardware stores in Haiti sell inverters and deep-cycle batteries suitable for this purpose.

Generators for longer outages. For businesses that need to run refrigerators, freezers, air conditioning, or extensive lighting, a generator is the most reliable option. The main drawback is fuel cost — running a generator for 8-12 hours during a scheduled EDH cut can cost G1,000 to G3,000 in gasoline per day. For small retailers, this often exceeds the profit from sales during that period, making generators uneconomical for daily use. Reserve generators for extended multi-day outages or for protecting perishable inventory.

Solar charging. A small solar panel (50-100 watt) with a charge controller can keep your devices and power bank charged during daytime outages. Solar is particularly useful in provincial cities like Jacmel, Les Cayes, and Cap-Haïtien where sunshine is reliable and grid power is less consistent. A basic solar charging setup costs G8,000 to G15,000 and pays for itself within months if it eliminates generator fuel costs.

Managing perishable inventory during power cuts

For grocery stores, restaurants, and any business that sells refrigerated or frozen goods, power cuts pose a direct threat to inventory. Perishable products can spoil within hours of a refrigerator losing power, representing a significant financial loss.

• Know your refrigerator's holdover time. A closed refrigerator or freezer maintains its temperature for 4-6 hours after power is cut, provided the door stays closed. Train your staff not to open refrigerators unnecessarily during outages. If you know a scheduled EDH cut is coming, refrigerate or freeze as much as possible beforehand to build thermal mass.
• Group perishables together. During an outage, move perishable items into a single refrigerator or freezer to concentrate the cold mass. Items packed tightly together stay cold longer than items spread across multiple units. Fill empty space with containers of water (which freeze and act as thermal batteries) if needed.
• Use a thermometer. Keep a simple thermometer in your refrigerator. If the internal temperature rises above 5°C (41°F) for more than 2 hours, food safety is compromised. Track the temperature during each outage to understand your equipment's limits and plan accordingly.
• Prioritize generator use for refrigeration. If you have a generator, prioritize running refrigerators and freezers over lighting or other non-essential loads. A small generator running just your refrigeration equipment uses less fuel than one powering your entire store.
• Consider propane or solar refrigerators. For businesses in areas with daily long-duration power cuts, propane-powered refrigerators or solar direct-drive refrigerators eliminate dependency on grid electricity for cold storage. The upfront cost is higher, but the operating cost is lower than running a generator daily.

Lighting and store operations without power

Evening power cuts are especially challenging because they combine darkness with the dinner-hour shopping rush. Here is how to keep your store functional:

• LED lighting on battery backup. A few LED bulbs powered by a small inverter or dedicated battery system provide enough light for checkout operations and basic customer navigation. LED bulbs consume very little power — a 10-watt LED provides as much light as a 60-watt incandescent bulb. Running 3-4 LED bulbs for 8 hours requires only about 300 watt-hours, which a small car battery can easily supply.
• Solar lanterns and rechargeable lights. These are inexpensive (G500 to G2,000 each) and can be charged during the day when power is available. Place them at the checkout counter, in aisles, and near high-traffic areas. Keep several fully charged at all times.
• Limit store access if needed. If lighting is insufficient for safe customer navigation, consider limiting the number of customers in the store or positioning staff at the entrance to assist. Safety should always come first — a dark store with scattered merchandise is an accident waiting to happen.
• Use battery-powered fans. Haiti's heat and humidity make stores uncomfortable without ventilation. Battery-powered clip-on fans cost G1,000 to G3,000 and run for 4-8 hours on a charge. Place one near the checkout counter to keep staff comfortable during outages.

Cash management during power cuts

Power cuts often force customers to pay in cash because mobile money and card processing require internet connectivity. Here is how to manage cash effectively during outages:

• Start with sufficient change. Before a scheduled power cut, ensure your cash drawer has enough small bills and coins for expected transactions. Once the power is out, you cannot run to the bank or use a change machine. Estimate your change needs based on typical sales volume during the outage period and prepare accordingly.
• Track cash carefully. Without electronic payment reconciliation, all transactions during a power cut are cash-based. Make sure every sale is recorded in Vendrex (which works offline) so your end-of-day cash count matches the system's expected balance. Discrepancies are much harder to investigate after the fact if transactions were not recorded in the system.
• Secure cash frequently. With limited lighting and potentially reduced staff, cash in the drawer is vulnerable. Remove excess cash from the drawer periodically and store it in a lockbox or secured location. Leave only enough in the drawer to make change. This reduces the risk of theft if the store becomes chaotic during a busy outage period.
• Communicate payment options before the outage. If you know a power cut is coming, let regular customers know in advance. Encourage them to bring cash if electronic payments will be unavailable. Some customers may choose to shop earlier in the day when power and internet are available. See daily sales reports to understand how outage timing affects your sales patterns.

Creating a power cut operational plan

Every store should have a simple documented plan for power cuts. Here is a template to adapt for your business:

1. Before the power cut — Check EDH schedule for planned outages. Fully charge all devices and power banks. Prepare cash drawer with adequate change. Check refrigerator temperatures. Charge backup lighting. Sync Vendrex data to cloud if internet is available.
2. During the power cut — Switch to battery-operated POS. Activate backup lighting. Monitor refrigerator temperature. Limit refrigerator door openings. Record all sales in Vendrex offline. Secure cash regularly. Keep devices charged from power banks.
3. After the power cut — Sync Vendrex data when internet returns. Reconcile cash against system totals. Check refrigerator and freezer temperatures. Dispose of any spoiled perishable goods and record the loss. Charge all devices and power banks for the next outage. Review the outage: was anything missing from your preparation? Adjust your plan accordingly.

Train at least two staff members on this plan. If the owner or manager is not present when a power cut begins, staff should know exactly what to do without needing to call for instructions. Run a practice drill during a scheduled EDH cut to identify any gaps in your preparation.

Frequently Asked Questions