Battery and charging
What does a voltage regulator do, and when do you need one?
A voltage regulator (AVR) corrects fluctuations in the electrical supply: when voltage drops or rises beyond normal, it brings it back into a safe range for the connected devices. It protects fridges, TVs, and computers from sags and spikes, but it supplies no power when the electricity goes out.
Why it matters on unstable grids
Household outlets in Venezuela and much of the Americas run at 120 V and 60 Hz, but on an unstable grid the voltage can sag heavily at peak hours or spike when power returns after an outage. Those swings damage motors, power supplies, and compressors.
The regulator senses the incoming voltage and adjusts it. Many also add a restart delay: they wait a few seconds after power returns before passing it on, which protects fridge and air-conditioner compressors.
Regulator, surge protector, and UPS
A surge protector only cuts off or absorbs overvoltage; it does not fix sags. A regulator keeps voltage within a range.
A line-interactive UPS combines regulation (AVR) with backup battery power. If you only worry about fluctuations and not continuity, a regulator is enough.
What to check before you buy
- Choose a capacity (VA or W) above the draw of the device you will plug in.
- For fridges and air conditioners, make sure it has a restart delay.
- If you also want backup when the power cuts out, a line-interactive UPS is the better pick.
Guides to help you choose
Frequently asked questions
No. It corrects voltage while there is power, but it has no battery. To keep power during an outage you need a UPS, an inverter, or a power station.