Rated for 700W continuous output, should feed that 30A charger comfortably.
Start your testing without any Economode, after your bank's been charging say 15-20 minutes
Then switch over to Economode, if that is an option.
In later tests, if the bank isn't too depleted, say 10-15%, you could just use Economode from the beginning.
Ideally you are measuring the charger output voltage and amps actually accepted by the bank
Once voltage is up at the 14.x setpoint, then current starts dropping very low, it is a waste to keep burning fuel for "the long tail", unless you also have other useful reasons to keep the genny going.
But at least a few times per week, make sure to use solar to keep charging the bank until trailing amps drop to .005C, or .5A per 100. This should usually take 4-5 hours after you shut the genny down (assuming enough solar watts and good sunshine, longer if not), so that first genny stage should ideally be complete in the AM, before solar input gets started.
If you are chronically unable to get to 100% Full, as per mfg endAmps spec, very regularly, then a lead bank won't last nearly as long, just as harmful as drawing down below 50%.
Especially for AGMs.