Originally Posted by edwmama
The generator is functioning properly or it will show an error message on its display. My battery meters are showing negative numbers not positive when I turn on the genset. That's how I learned that the genset is not charging
When I run the engine or connect to shore power I get positive numbers on the amp reading
What does the generator display actually display? The remote
display panel I found googling only shows errors for oil
pressure and temperature and nothing about the power output of the alternator
or its quality. The generator output could be bad without showing any errors on the display at all.
Most inverter/chargers will not operate outside of a narrow range of input voltage and frequency. They are also susceptible to not working when large harmonics are present in the power input. It is possible that the frequency of the generator has changed (have you measured the engine RPM's?) or that the voltage regulation is outside the parameters of the charger.
You cannot accurately say that the generator is operating properly without showing that it can operate other equipment
with a voltage output of 120V +/-10% with a frequency of 60Hz +/-5%.
The generator is not charging your batteries, the battery charger is. To differentiate where the problem lies, you need to prove that one or the other is working well. Since the charger works on shore power, that shows that the charger is working well when it has clean power at proper voltage and frequency. Now you need to determine if the generator output even exists, and if it does is it clean and within voltage and frequency specifications.
To measure the voltage and frequency coming out of the generator, you need a suitable multimeter with frequency capability. You can do this from a powered outlet in the boat if you have one. It is more difficult to measure harmonics, but most of the time these are clean up a lot when a large resistive load is applied. If you measure proper voltage and frequency output, try turning on the water
heater or plugging in a space heater and see if the charger kicks in.
From the manual, it looks like there are two fuses
on board. If you do not have output, you might start there.
I detect that you do not have much experience with generators, inverter/chargers and AC power. Like others, I recommend you get experienced help because this is very dangerous stuff to be poking around in if you do not know what you are doing or how these systems are wired and operated.
has nothing to do with the problem here - that is a completely separate and isolated charging system that doesn't involve the inverter/charger.