What what kind of charger do you have? That will determine whether the generator can fully supply the charger or not. Most likely, the generator cannot charge your batteries one to one with consumption, so a model might be run the motor for an hour, it takes two hours to charge via generator or something like that. But really it's all speculation without knowing what kind of charger you are using. With a portable generator on the water you do need to be really careful with exhaust. There is a reason marine generators typically mix the exhaust with water: it is really easy for the wind on the water to send the exhaust back into your cabin or whatever area your people are congregating in and give everyone carbon monoxide poisoning. So when using portable generators on a sailboat just make sure that you're paying attention to the wind etc. the same way you do when sailing.
On May 29, 2022, at 16:29, bobkart <couch45@msn.com> wrote:
You have ~7.7kWh total capacity in those VRLA batteries. Considerably less 'net' capacity, when considering lead-acid DOD limits.
Around 3.5 hours of your 2.2kW generator will generate that much energy. Of course the charger won't be 100% efficient from AC to DC, then lead-acid batteries are not very efficient input-to-output. So call it four hours, then roughly halve that to keep within a 50% DOD limit.
So yeah, that generator is plenty for that size battery bank. In the ballpark of two hours should be enough to get from 50% to 100% SOC.
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