How Many Amps Is An 8000 Watt Generator?

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Knowing how many amps an 8000 watt generator is can help you know whether this is big enough and whether you need extra breakers.

Applying the Watts = Amps x Volts formula would give you the impression that an 8000 watt generator offers 66.67 amps at 120 volts and 33.33 amps at 240 volts.

However, you need to know that the amp output of portable generators is limited by their outlets too.

In the case of 8000 watt generators, the outlets tend to “only” have a capacity of 30 amps.

That means this is how many amps generators around this power level can typically run. No matter whether you are using 120 or 240 volts.

How many amps an 8000 watt generator can theoretically put out

People who are familiar with electronics may go straight to the Watts = Amps x Volts to get an idea of how many amps an 8000 watt generator can put out.

With this formula, you would estimate that an 8000 watt generator produces 66.67 amps at 120 volts.

Similarly, you would think that you can get 33.33 amps out of an 8000 watt generator at 240 volts.

That being said, in the context of a portable generator, this formula and its results are not the only relevant details.

How many amps an 8000 watt generator can actually run

The main thing to keep in mind is that generators have outlets that can only deal with so many amps.

More specifically, 8000 watt generators tend to “only” have 30 amp outlets.

That means a single 8000 watt generator can only run devices that need 30 or fewer amps. At least if you want to run these devices as desired.

While I have not seen 8000 watt generators with this capability built in, you could theoretically be able to get more amps by safely putting two models in parallel.

However, 30 amps are already enough to make the devices an 8000 watt generator can run an impressive list.

How many volts is a 8000 watt generator?

Similar to amps, 8000 watt generators are limited by their outlets in terms of how many volts they can put out.

In this power category, generators can typically run up to 240-volt appliances and tools (assuming these don’t need more amps and watts than the generator offers).

What size breaker do you need for an 8000 watt generator?

Breakers help you protect your electrical circuits by interrupting the throughput when the power gets too high.

The first thing to note is that you may not even need a breaker after figuring out that 8000 watt generators can typically only put out 30 amps.

That being said, your electrical circuit could only be able to deal with even fewer amps than this. For example, 25 amps.

In that case, you would get a 25 amp breaker for your 8000 watt generator and power levels around this.

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Mats is the founder and head editor of Generator Decision. With a combination of critical thinking, tireless research, and a healthy interest in electronics he helps people find the right generators and how to use these. At this point in the journey, Mats has done research on hundreds of portable generators.