Generator breaker keeps tripping under light load

No it sounds like the engine is losing power, as the RPM drops the voltage drops, this increases the current load and that trips the breaker.

How much time have the Generator?
looks like batteries needs to change it.

First check the load and grounding, you will need to measure the amperage draw wih an ammerter, also check to see if it trips when a large unit like a motor or air conditioner starts, it may not be able to handle the inrush. Also be aware that if your breaker is a 30amp does not mean you can pull 30amp you can safely constantly draw 80% of that. Also check your grounding of the equipment you are powering.

Is it tripping under load? or not under load. If it is under load have breaker checked and unit tested on a load bank. If it trips under no load check for wiring shorts on the main AC lines to the plugs

1. Make sure that the generator limit is not being exceeded.
2. Try checking and raising the rpm. If the engine can not sustain the load from the generator, it can/will trip the breaker.
3. If the carb is dirty or the engine runs poorly it can trip the breaker. Tune up the engine, clean the carb, make carb adjustments to correct substandard running conditions.

wet plugs,exceeding max load of circut,whatever it is running has a short in it.

Hello, First figure out what the load per leg is on your generator. Are you using the 240 Volts because this is two 120 AC volts legs and they are 120 degrees out of phase with each other.

You will need to figure what the power factor is for each phase on this generator. To figure the power/wattage by using ohm's law. Voltage times Current will give you Watts. Example: If the generator is generator 240 volts the maximum current available is about 23 amps. The maximum current for 120 volts will 46 amps. Therefore, the maximum current per 120 volt circuit is 23 amps for one circuit and 23 amps for the second 120 circuit..

I would try replacing the circuit breaker with the same amperage breaker. Also, watch what the generator load is per circuit. You can install current meter for each circuit. This will give a good indication of which circuit is pulling more load than the other circuit. GB...stewbison

A tripping circuit breaker is an indication of an overload. You say there is no load on the breaker - how are you making this determination? Are you using an amprobe or some other meter?

A circuit breaker with NO load shouldn't ever trip. Likewise a circuit breaker carrying up to 80% of of the current it is rated for shouldn't trip either. Circuit breakers that carry more than 80% of their load will trip - if the load remains connected long enough. This is called "duty factor" or "service factor" The greater the load is in excess of 80%, the less time that the breaker will carry it before tripping.

An example of a 100 amp breaker with different loads on it (this 100 amp value was chosen for ease of doing the math):

80 amps - never trips
85 amps - trips after 48 hours
90 amps - trips after 16 hours
95 amps - trips after 8 hours
100 amps - trips after 4 hours
105 amps - trips after a few minutes
120 amps - trips after a few seconds
150 amps - trips instantly

This is only an example to show how a certain circuit breaker might trip under a load less than the rating stamped on the body or handle.

A circuit breaker that trips with no load or a load equal to or less than 80% of its rating is most likely defective. You need an amprobe or ammeter for amp readings. If the load is found to be 80% or less, there may be an issue of harmonics that is causing the tripping. You'll need to have special equipment and qualified persons to check harmonic problems. Most harmonic problems occur when the loads are not linear device (transformers). Examples of non-linear devices are "switching" (or solid state) power supplies like those in computers.

I hope this helps and good luck. Please rate my reply. Thank you.

try a new breaker, they do wear out over time

the fact that it's tripping the breaker on the genset would suggest the the problem is not at the generator but rather on the load side of the genny before anything else I would seperate the generator from the rvs electrical system and apply some other load some thing fairly heavy toaster heater ect.. the fact that it's stopping the generator is a little unusual but it could just mean that the electriacl panel has a relay that keeps the generator running when the power dies so does the generator .load test should point you in the right direction I,ve owned 4 motor homes and when I wish you luck I realy mean it.
Good Luck