If you want to buy a battery to keep a refrigerator running during blackouts in Cuba, the first thing you need to know is that not all batteries are suitable. Some can power lights, fans, and phones, but they do not have enough strength to start the motor of a refrigerator.
To make a good choice, you need to know three things: how much energy your refrigerator consumes, how many hours you want to keep it running, and what capacity the battery you plan to buy has.
What battery do you need based on how many hours the outage lasts?
Portable batteries, also known as power stations, are sold with varying capacities. This capacity is expressed in Wh (watt-hours) and gives an idea of how long they can supply electricity.
This table provides guidance for a household refrigerator that consumes, on average, about 60 W throughout the day. Actual usage may vary significantly depending on the model, the ambient temperature, and how often the door is opened.
Capacidad de la bateríaAutonomía aproximada| 500 Wh | 4 a 6 horas |
| 1.000 Wh | 9 a 12 horas |
| 2.000 Wh | 18 a 24 horas |
| 3.000 Wh | 27 a 36 horas |
These figures are estimates, not guaranteed times. An old, large, or inefficient refrigerator can consume much more and deplete the battery sooner. There are also energy losses at the portable station.
If the power outages last four or five hours, a 1,000 Wh battery can be a reasonable option for an efficient refrigerator. However, for outages lasting 12 hours or more, it is advisable to consider capacities of 2,000 Wh and up, always checking the actual consumption of the appliance.
There is another important detail: a 2,000 Wh battery will not necessarily power the refrigerator for twice as long as a 1,000 Wh battery in all conditions. The outcome depends on the equipment's consumption and the efficiency of each station.
What you should check before buying the battery
Before spending money, check the refrigerator label and the battery specifications. It's not enough for the seller to claim it has 1,000 or 2,000 Wh.
1. It should have enough power to start the refrigerator. When the motor begins to operate, it requires more electricity than during normal operation. A portable station may have stored energy for several hours and may still shut down when trying to start the compressor.
For example, a refrigerator that consumes 150 W while running may require significantly more power during startup. Before purchasing, check that the continuous power and maximum startup power of the station are compatible with the equipment.
2. Ensure the voltage is compatible. In Cuba, refrigerators of 110 or 120 volts are common, although there are also 220-volt units available. Check the appliance's label and look for a power outlet that matches the required voltage, preferably with a pure sine wave output and compatible with a frequency of 60 Hz when applicable.
3. That the capacity is indicated in Wh. Some advertisements highlight figures such as 1,000 W or 2,000 W, but that does not mean the battery has that amount of stored energy. Watts indicate power; Wh indicates capacity. To know how long it can last, you need to be aware of the Wh.
4. That allows for practical recharging. During prolonged power outages, a depleted battery becomes useless until it can be recharged. Check how long it takes to recharge using grid electricity and if it supports solar panels. If you want to use solar energy during an outage, you need a system designed to operate independently of the electrical grid.
5. It should have a warranty and security protections. It is advisable to choose equipment that offers protection against overloads, excessive temperatures, and short circuits. LiFePO4 batteries are a common choice in portable stations due to their long lifespan and stability, although they also require ventilation and proper usage.
If you don't know how much your refrigerator consumes, you can look up the exact model on its label and check the manufacturer's specifications. Ideally, you should know its daily consumption in kWh or measure it with an electricity meter. This information allows for a much more accurate calculation of its autonomy.
What to consider if you are going to send a battery to Cuba
Many Cuban families rely on relatives abroad to acquire power stations. However, before purchasing a battery to send to the island, it is crucial to check how it will be transported.
Portable high-capacity stations use lithium batteries and are subject to transport restrictions. According to the Federal Aviation Administration (FAA), spare lithium batteries of up to 100 Wh can generally be carried in carry-on luggage; those over 100 and up to 160 Wh require airline approval and are subject to quantity limits.
A station of 1,000 or 2,000 Wh far exceeds those limits. According to the FAA, power stations with lithium batteries over 160 Wh are prohibited on commercial passenger flights, both in carry-on luggage and checked baggage. To ship it, it is necessary to consult in advance with a company that accepts this type of merchandise and to verify transportation requirements, documentation, and entry into Cuba.
You should also check the total price. In addition to the station cost, there may be shipping fees, taxes, and other charges. A battery that seems affordable could end up being much more expensive after transportation.
If you are going to buy it for a family member, first ask them for a photograph of the refrigerator's label. With the model, voltage, and power consumption, you can check if the chosen station has sufficient capacity and power.
And remember something essential: a battery does not produce electricity, it only stores the electricity it receives while being charged. If the blackouts are very long and there isn't enough time to charge it between outages, it may be necessary to combine it with compatible solar panels or another power source.
Before making a payment, confirm these four details with the seller: capacity in Wh, continuous power in W, maximum starting power, and output voltage. These specifications will help you avoid making an incorrect purchase.
The Cuban tropical climate —with typical temperatures ranging from 28 to 35 °C— can accelerate the degradation of batteries if they are not properly ventilated. In addition, there are risks associated with intensive use. Repeated discharges down to 0%, voltage fluctuations when restoring electricity, and the use of inadequate chargers can also cause damage to equipment.
The cost of these solutions —a portable station can exceed $1,000, and a complete system with solar panels can reach $7,000 plus installation— makes protecting the equipment as important as choosing it wisely.
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