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Old 10-16-2013, 12:56 PM   #1
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Generator / Converter Question

Hey Gang,

Quick question for you guys. I'm heading out this week for a State Park camping trip. State Park means no hookups (at least for me). I'll be bringing along my Honda EU2000i Companion for my power needs. My question/scenario is this.

First thing in the AM I'm sure my little group 24 battery is going to be thirsty from having had the furnace on all night. When I go and hook my generator up after we wake up, I'm assuming that the converter is going to see the shore power and start bulk charging the battery. If I go and plug in my coffee maker a few minutes after connecting my camper to the generator, will the converter scale back its charging demand so that there is enough power for the coffee maker? Or am I going to overload my generator?

I'm asking before I kick myself not running the coffee maker directly off the generator (though if I have to do that, its a pain).

????

Thanks !
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Old 10-16-2013, 03:21 PM   #2
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I'm not an electrical guru..., but based on boondocking with my genny, your converter/charger output shouldn't be effected by the use of only the coffee maker with your genny supplying power through your shore cable.

With my Yamaha 2400 I've run my A/C and frig, while my converter/charger was charging my battery bank as it normally does (according to my Tri Metric battery monitor).

Bob
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Old 10-16-2013, 03:51 PM   #3
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... have to assume here the coffee maker is AC. The converter will take what AC is left while you brew your coffee and charge your battery at a lower rate while the coffee maker is on. No harm done - just takes a little longer.
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Old 10-16-2013, 05:19 PM   #4
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Excellent - thank you all.
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Old 10-16-2013, 07:38 PM   #5
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Quote:
Originally Posted by OnTheGo View Post
snip...... The converter will take what AC is left while you brew your coffee and charge your battery at a lower rate while the coffee maker is on. No harm done - just takes a little longer.
I would have thought if there was an additional DC load on the converter/charger that it may effect charge time, but not AC (per OP's condition). But then again, I'm a wrench and breaker-bar guy

Bob
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Old 10-17-2013, 03:59 AM   #6
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We do this all the time. However we use a Cuisinart Coffee Grinder/Brewer to make our first pot of fresh ground bean coffee each morning which is only drawing high 120VAC current for approximately 4-5 minutes run time. After this the coffee is poured up into a thermo Carafe which keeps the brewed coffee hot all day long. This is perfect for being used with the generator as it only draws power for 4-5 minutes each morning. Using the same brand bottled water we bring with us on our trips our fresh made bean coffee is always the same nice flavor no mater where we are camping.

Our PLAN B for this is to brew our coffee from the stove top Coleman coffee percolator - does not require the 120VAC at all doing this.

Roy Ken
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Old 10-17-2013, 05:27 AM   #7
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The converter is another AC load just as the coffee pot is. As long as the total AC load does not exceed the generator capacity all is fine. The coffee pot WILL NOT affect the charge rate of the battery. The converter is only involved with 12VDC loads. It will reduce the battery charge rate only by the amount it needs to supply the lights, water pump, heater fan and other DC loads.
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Old 10-17-2013, 05:47 AM   #8
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The converter is another AC load just as the coffee pot is. As long as the total AC load does not exceed the generator capacity all is fine. The coffee pot WILL NOT affect the charge rate of the battery. The converter is only involved with 12VDC loads. It will reduce the battery charge rate only by the amount it needs to supply the lights, water pump, heater fan and other DC loads.
Good answer. But it left me with a question. ... limited amps available (about 13?) from generator. If the AC demand (in this case a coffee maker) uses a big portion of the supply, doesn't it affect (diminish) the DC supply from the converter?

Thanks in advance
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Old 10-17-2013, 05:54 AM   #9
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Quote:
Originally Posted by OnTheGo View Post
Good answer. But it left me with a question. ... limited amps available (about 13?) from generator. If the AC demand (in this case a coffee maker) uses a big portion of the supply, doesn't it affect (diminish) the DC supply from the converter?

Thanks in advance
Simple answer: No. The converter WILL NOT adjust charge rate based on AC loads. The converter has no way of knowing there is only 13 amps available. It doesn't work that way. If the AC load exceeds the generator capacity the generator will shut down. Then the coffee pot AND the battery charge goes to ZERO.

The coffee pot HAS NO EFFECT on the battery charge rate as long as the generator capacity is not exceeded. When that happens all loads not supplied by the battery cease.
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Old 10-17-2013, 07:22 AM   #10
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So ... how many amps does the converter pull when charging a battery if its been running the heater all night? I really don't want to bring both Hondas with me just so I can make a cup of coffee in the AM .... or maybe I need to run a extension cord off the Honda just to the coffee maker - which is really a ghetto way of doing it if you have a camper I think.
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