Working during a power outage is always a struggle, but did you know that if you have Verizon Fios you can get your internet working. Every home with Fios has an ONT (Optical Network Terminal) most likely in a closet or a basement. Here’s what they look like… 
On the left side there is a compartment for a battery which Verizon no longer provides. Technically the battery is to keep your voice lines alive in a storm so that you can call 911 is need be, but the battery also provides power for your internet, so the first tip is to make sure you have a battery in your ONT and replace it when it starts to beep with a red LED. The battery should last a few days with no power, also do not forget to also power your Fios modem. Technically if you also power a TV and a cable box, TV will work also. Here’s another tip. Lets say the battery dies in your ONT or there is no battery in the ONT at all. This unit does plug into the wall where it gets it’s primary power to run the device and charge the battery. A generator, a car power inverter, or even a simple desktop battery backup UPS device can run this unit as well. Just don’t forget to also power the Fios modem. If your the type of person that can’t stop working even during a storm, a generator with a power strip and a few very long extension cables can really save the day. Please keep in mind that this will not work for Cable internet. Cable company ONT’s are on the street and receive city power with no backup. Verizon clients are fortunate that they have a backup plan when disaster strikes.
Frequently Asked Questions
Does Verizon Fios work during a power outage?
Fios requires power at the home ONT (Optical Network Terminal). Without battery backup or a UPS, internet, phone, and TV all stop within seconds of the outage.
How long does the Fios battery backup last?
Older Verizon-supplied BBU batteries lasted about 8 hours for voice-only. A consumer UPS sized to the ONT can deliver 1 to 6 hours of full internet, depending on capacity.
Does Verizon still provide a battery for Fios?
Verizon stopped including free battery backup with new Fios installations several years ago. Customers can buy a compatible battery or use a third-party UPS.
What size UPS do I need for a Fios ONT and router?
A 600 to 900 VA UPS (for example APC Back-UPS 600 or CyberPower CP900) is enough for a typical ONT plus Wi-Fi router for several hours.
Can I use Fios on a generator?
Yes. Plug the ONT and router into the generator’s surge-protected output. Avoid powering the ONT directly off a noisy inverter without a UPS in between.