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Old 08-18-2014, 07:00 AM   #15
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With a residential fridge we use our inverter while in motion to power it. The engine alternator keeps the batteries charged so that is not a problem. If it is hot out, generator gets used for the a/c. Other than that I think we could live without one. Still nice to have just in case.

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Old 08-18-2014, 07:17 AM   #16
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While drycamping if the tv is all we are using,
the genny is overkill so I use the inverter.

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Old 10-22-2014, 08:55 PM   #17
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I would err in favor of overkill for the inverter. I didn't remember what you wanted to use it for but a coffee maker, hair dryer, toaster, desktop broiler and many microwave ovens use about 1500 w each. The 3,000 watt offers lots of comfort room and the better half won't scream when the coffee pot, hair dryer etc. won't work. Most inverters can not be hard wired to send the whole 3,000 watts to a sub panel, instead they provide two 1500 watt outlets. These often will not run an 8 cup coffee maker. If you get a xantrex 3000 watt you can hardwire to a sub panel using 10 gauge Romex. Be sure to use 2/0 wire or greater for your DC hookup.

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Old 10-22-2014, 09:05 PM   #18
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In our old gas class A, we didn't have an inverter, but I wired up a cigarette lighter outlet to the house batteries, and just bought an inexpensive 160watt inverter the size of a pack of cigarettes, and we used that to charge phones/laptops/mifi units. You can do that from your regular cigarette lighter, of course, but in our case this not only put it in a more useful spot, but left the chassis battery undrained just in case something went wrong...

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Old 10-23-2014, 06:42 AM   #19
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Originally Posted by MCJones View Post
It is nice to have 120v power when stopped and not have to fire up the generator. IF the weather is cool enough not to need A/C, I use the inverter during the night for my CPAP instead of having to run the gen just for that when boondocking. Stopping at a rest area, I have even used the inverter for the microwave to heat up left over coffee and even watch for the weather on TV. It isn't a "must Have" it is a glad I have it kind of thing. Mine is an older modified sine wave - does anyone know if it hurts the microwave to use it with a MSW?
Most CPAPs will run on DC 12v if you get the DC cord for it and you eliminate the inverter overhead. I was able to find 12v cords for both of mine and eliminated my main requirement for an inverter. Another plus is that on extended dry camps, I can use a large portable jump start battery or a 35AH Deep Cycle battery to minimize discharging the house bank.
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Old 10-23-2014, 12:24 PM   #20
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Just a note on sizing; you were asking if a 2500W inverter is large enough. Our 2005 Newmar has a build-in xantrex 2000W MSM inverter/converter. It does work really well for the microwave, coffee maker, etc. when we make pit stops or dry camp. No, we can't use them all at once, but we try to avoid being stupid, so that's (usually) not a problem. When we travel, we leave the Samsung refrigerator running. Everything works great with this setup.


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