Is it possible to run batt charger on gen while using inverter? R27

hawk232

Well-known member
Joined
Jan 20, 2025
Messages
52
Location
Crystal River, FL
Fluid Motion Model
R-27 (Outboard)
Vessel Name
Alternate Approach
I already own a Honda 1000 generator. I havent tested yet but I am hoping it can run the AC OR the battery charger ( I know it cant run both, hence the question). For day trips, if I could run the battery charger I could run the AC as well as other higher draw items (keurig, grill etc.) while the AC is running (VIA the inverter). If I use the gen as "shore power" I will only be able to power the AC and thats it. I know that even with the battery charger on I will have a net loss of battery, thats fine for a day trip.

Looking at the panel it would appear this is not possible since I would need to have the shore power breaker on which would block off the inverter breaker.

I hope what I am asking makes sense. I am just hoping to be able to use the AC and other items for a full day on the water and using the charger should extend me from the "5 hours" of ac use that the lithium will provide.
 
You run the inverter to create 120volt AC power to run loads such as the microwave and the outlets. To run the battery charger off the inverter would create a feedback loop. ( 12volt DC to the inverter to make 120volt AC, to the battery charger that takes 120volt AC and puts it back into the battery at 12volts DC).

You can simply plug your Honda 1000 generator into the shorepower plug in on the boat. The boat will then operate as if on shorepower. You may run the microwave, the air conditioner, the battery charger. The inverter remains off in this scenario as you're running a generator to create 120volt AC power.
 
You run the inverter to create 120volt AC power to run loads such as the microwave and the outlets. To run the battery charger off the inverter would create a feedback loop. ( 12volt DC to the inverter to make 120volt AC, to the battery charger that takes 120volt AC and puts it back into the battery at 12volts DC).

You can simply plug your Honda 1000 generator into the shorepower plug in on the boat. The boat will then operate as if on shorepower. You may run the microwave, the air conditioner, the battery charger. The inverter remains off in this scenario as you're running a generator to create 120volt AC power.
Might need to pick what you want to have on due to the load, like shut off AC while Grilling.
 
You run the inverter to create 120volt AC power to run loads such as the microwave and the outlets. To run the battery charger off the inverter would create a feedback loop. ( 12volt DC to the inverter to make 120volt AC, to the battery charger that takes 120volt AC and puts it back into the battery at 12volts DC).

You can simply plug your Honda 1000 generator into the shorepower plug in on the boat. The boat will then operate as if on shorepower. You may run the microwave, the air conditioner, the battery charger. The inverter remains off in this scenario as you're running a generator to create 120volt AC power.
I was afraid that my wording may have not been clear, that is now confirmed!

I am not trying to run the battery charger off of the inverter (that would be pretty silly). I want to run the battery charger off of the generator while being able to use the inverter for other appliances. Not sure why I had so much trouble wording it originally haha.
 
I was afraid that my wording may have not been clear, that is now confirmed!

I am not trying to run the battery charger off of the inverter (that would be pretty silly). I want to run the battery charger off of the generator while being able to use the inverter for other appliances. Not sure why I had so much trouble wording it originally haha.
If you are running a generator to power the battery charger, there is no need to run the inverter as the generator provides 120v ac to the boat for all 120v appliances.
 
If you are running a generator to power the battery charger, there is no need to run the inverter as the generator provides 120v ac to the boat for all 120v appliances.
I understand that. The generator is 1000w, the inverter is 3000w. The generator can power only one item. The inverter can power multiple. If I can charge the lithium bank while using the inverter it would let me run the ac while also using the grill, or the heater while running the water heater. While these items draw more than the charger is putting in, it would extend my use before running down the house bank.
 
If the charger were wired directly to the gen set, I think it would work just fine.
 
If the charger were wired directly to the gen set, I think it would work just fine.
Yea, I guess that is my answer. I need to see if it is plugged into an outlet or hardwired. If an outlet, i can just plug it into the gen.
 
I think it’s wired directly to panel.
 
Back
Top