Vchasno.Kasa during a blackout: how to continue sales and fiscalize receipts without electricity and the internet?

Terminal malfunctions, lack of internet, and the risk of fiscalization errors — Ukrainian businesses face these issues every time the power goes out. Scheduled and emergency power cuts have become a daily routine, but even during blackouts, entrepreneurs are required to issue fiscal receipts. This is especially true for cash payments, which often remain the only working method of payment.

Modern PRROs, in particular Vchasno.Kasa, allow businesses to continue operating even without electricity or communication. Here’s how it works and what you need to get started.

Why can’t businesses ignore checks during blackouts?

Fiscalization of every sale is not a recommendation, but a clear requirement of the law. Law No. 265/95-VR does not provide for exceptions in the event of power outages, lack of internet, or work in difficult conditions.

When a business makes a calculation and does not issue a fiscal receipt, it effectively creates a non-fiscalized transaction. From the point of view of tax legislation, this is equivalent to a “shadow” sale and may be grounds for penalties.

Cash payments are a separate area of risk. During blackouts, cashless payments via terminals are often unavailable, so customers switch to cash. It is not advisable to sell goods/provide services without registering the transaction at the time of payment and then issuing a receipt when the power comes back on.

Non-fiscalized sales during blackouts carry a number of risks:

• penalties for unaccounted cash and transactions without receipts;
• the risk of tax audits due to customer complaints or random checks;
• accounting issues when some sales are recorded manually and others through the POS system;
• loss of trust among customers who want proof of purchase.

Modern software solutions allow you to comply with fiscalization requirements even in the most difficult conditions. But in order to ensure that the cash register does not “go down” during power outages, businesses need to take care of technical readiness in advance.

Technical preparation: what is needed for the cash register to work without electricity?

To keep the cash register running, it is important for businesses not only to have software-based cash registers, but also to properly prepare the equipment for operation in conditions of unstable power supply.

Software-based cash registers can run on any modern smartphone, tablet, or laptop—the main thing is to ensure uninterrupted power supply and the minimum necessary conditions for fiscalization.

💡 UPS or uninterruptible power supply

This device keeps electrical appliances running during power outages or interruptions in the main power supply. It is the simplest option for small retail outlets. Its advantages are:

• provides backup during short power outages;
• protects equipment from sudden shutdowns;
• provides several more hours of operation for your router or laptop.

For PRRO on a smartphone, this is often more than enough.

💡 Inverters and batteries

This is the solution for businesses that need long-lasting autonomy. The inverter, complete with a battery, can provide power for:

• laptop;
• cash register printer;
• router;
• bank terminal;
• lighting.

The duration of operation depends on the battery capacity — on average, from 2 to 8 hours.

💡 Generators

Ideal for shops, cafes, and other locations where it is necessary to maintain the operation of the entire premises. The generator allows you to work in virtually the same mode as usual. Important to consider:

• availability of fuel;
• ventilation;
• safety requirements.

This solution is often chosen by large outlets and chain businesses.

💡 Charging stations and solar panels

Charging stations are a modern, mobile, and environmentally friendly solution that Ukrainian businesses are increasingly choosing. They provide a stable power supply for key devices necessary for business operations.
When paired with solar panels, a charging station becomes a completely autonomous system. This allows you to continue working for hours or even days without access to the power grid.

Recommendations from tax authorities

If there is a power outage during work and the PRRO is registered with the option of offline mode, the cashier must switch the system to offline mode. In this format, settlement transactions can continue without interruption during a blackout. After the end of the work shift, the entrepreneur (cashier) must generate a Z-report and correctly close the shift.

If the PRRO is configured exclusively for online exchange, you will have to wait until the connection to the fiscal server is restored — only then can work be continued.

How does Vchasno.Kasa solve the problem of no internet or communication?

During blackouts, Wi-Fi often does not work, and mobile communication is so weak that it becomes impossible to transfer data to the DPS server in real time. At such times, businesses need a solution that does not depend on the quality of the system.

🌟 You can accept payments even in the dark

In the absence of an internet connection or communication between the cash register and the tax service server, Vchasno.Kasa automatically switches to offline mode.

In addition, each PRRO has a reserve of fiscal numbers that are used to generate receipts without a connection to the State Tax Service. Vchasno.Kasa reserves 2,000 such numbers by default (the list can be increased to 5,000 if necessary) — this is more than enough to work even during prolonged blackouts.

In offline mode, the cashier generates a receipt in the usual way, and the buyer receives it in a convenient way:

• via a QR code on a smartphone screen;
• in electronic form after restoring the Internet connection;
• in paper format, if a standalone printer is used.

This means that sales do not stop even during prolonged power outages
or complete loss of mobile communication.

🌟 All receipts are stored in the PRRO

All generated receipts are securely stored in the memory of the software cash register. The data is not deleted when the smartphone is rebooted, and the sales history remains available to the cashier. This ensures that no transaction will be lost — even if the connection is lost for the entire day.

🌟 Automatic synchronization with the State Tax Service

As soon as the Internet connection is established, Vchasno.Kasa automatically sends all accumulated receipts to the tax service servers. No manual actions, re-registration, or additional settings are required. The system independently ensures the correct fiscalization of each transaction.

🌟 Minimizing risks for business

Thanks to stable offline operation and automatic synchronization, businesses gain a number of important advantages:

• continuous operation and compliance with legal requirements even without electricity;
• no downtime and minimization of lost sales;
• preservation of all information about calculations and cash control;
• avoidance of the risk of fines and debts to the tax authorities due to late registration of checks;
• complete confidence that no transaction will remain unregistered.

Conclusion

Power and communication outages can disrupt business operations, but this is easy to prevent. Modern technologies allow businesses to remain reliable and predictable even when external conditions become unstable.

A few simple solutions include backup power for equipment and the use of a cash register that can operate autonomously. In this combination, Vchasno.Kasa ensures the most comfortable and secure operation: sales do not stop, receipts are not lost, and all legal requirements are met automatically.

Take care of backup tools now — this will help your business operate confidently and without delays, even despite the current conditions of unstable power supply.