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If the genset is running, it is producing power.
Your problem is that either the 120 is not getting to your converter, or your converter is bad.
If you have a stand alone converter, check the receptacle that it is plugged into and make sure you have 120V at the receptacle.
If your converter is part of your power control center, you can simply check for 120V right at the breaker that the converter is connected to.
If you have a stand alone converter, most of them have 1 or 2 main fuses on the outside. Check to make sure the fuse(s) are not blown.
If you have 120V getting to the converter, but do not have about 13.6V coming out, the converter is bad and will need to be replaced.
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