How Long can a UPS Keep a Router Running?

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The duration for which a UPS (Uninterruptible Power Supply) can keep a router running depends on several factors, including the capacity of the UPS, the power consumption of the router, and the load on the UPS.

Here’s a general overview:

UPS Capacity:

The capacity of a UPS is usually measured in volt-ampere (VA) or kilovolt-ampere (kVA). The higher the capacity, the longer it can provide power to connected devices. For example, a UPS with a capacity of 500VA will have less backup time compared to a UPS with a capacity of 1000VA.

Power Consumption:

Routers typically have low power requirements, usually ranging from 5 to 20 watts. However, this can vary depending on the model and the number of devices connected to the router.

Load on the UPS:

The total load on the UPS affects the backup time. If you have multiple devices connected to the UPS, such as modems, switches, or additional networking equipment, the backup time for each device will be reduced.

In general, a typical UPS can provide backup power for a router for anywhere between 30 minutes to a few hours. It’s important to note that the backup time decreases as the load on the UPS increases.

Therefore, if you have multiple devices connected to the UPS, the backup time for each device will be reduced.

When selecting a UPS, it’s advisable to consider the power consumption of your router and any other devices you want to connect to the UPS.

You should also factor in any additional power requirements in case of power fluctuations or outages, as well as the specific needs of your network setup.

If you has the 12volt battery directly it would be simpler because you are going to lose a lot because of the conversion. The percentage you loose is actually larger because you are pulling such a low load and there is some amount of fixed overhead for fans and such.

In a perfect world with no overhead you could get a couple of days if the router only takes say 1amp.

You best way to guess is to look up the batteries the UPS uses. For example if it uses 4 7.5amph 12volt batteries you would know you have 30 hours of power at 1amp at 12 volts with no overhead.

If the router is very low power and you have fairly new batteries I bet you can get 10-12hr out of it even with all the conversion to 120v and back. I know one I have that is about that size can run my tivo for over 12hrs.

If you are looking for more details, kindly visit Router UPS Power Backup.