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Old 03-09-2014, 10:21 AM   #29
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Docj,
That's how it came. I am certain that the engineers at Fleetwood would be interested in your opinion!
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Old 03-09-2014, 01:15 PM   #30
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We use the inverter while driving, unless we need to run the genny for the air conditioners. Works for us!
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Old 03-09-2014, 04:16 PM   #31
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Docj,
That's how it came. I am certain that the engineers at Fleetwood would be interested in your opinion!
Leads me back to something I've speculated on before, that few RV manufacturers have any real engineers. There's nothing wrong with having all that inverter power, that way you can power just about anything in your MH (for a short period of time, depending on how many batteries you have). But devoting a 2800 watt inverter just to a fridge is downright ridiculous. Believe, me I have a PhD in physics and could run through a page of equations to demonstrate why this is so incredibly wasteful!
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Old 03-09-2014, 05:05 PM   #32
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MSHappyCampers and Gary RVRoamer...Why do you run your inverters when on the road if you don't need them to do anything? I leave mine off unless needed...why subject them to the extra wear and tear?
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Old 03-09-2014, 05:05 PM   #33
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Leads me back to something I've speculated on before, that few RV manufacturers have any real engineers. There's nothing wrong with having all that inverter power, that way you can power just about anything in your MH (for a short period of time, depending on how many batteries you have). But devoting a 2800 watt inverter just to a fridge is downright ridiculous. Believe, me I have a PhD in physics and could run through a page of equations to demonstrate why this is so incredibly wasteful!
It also almost seems like they got the 2 inverters mixed up at the factory.
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Old 03-09-2014, 05:22 PM   #34
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It also almost seems like they got the 2 inverters mixed up at the factory.
Kinda what I was thinking. When I read the post I thought it looked strange. Maybe somebody has the wires crossed in their head, and the 2K is on the fridge.
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Old 03-09-2014, 06:19 PM   #35
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For those with a residential fridge turning off the inverter isn't an option. But our Magnum 2.8kW pure sine wave inverter uses only ~25 watts when not being called on to provide power. So why turn it off? Leaving it on means the bedside alarm clocks keep the correct time!
You have an alarm clock in your RV?
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Old 03-09-2014, 09:30 PM   #36
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MSHappyCampers and Gary RVRoamer...Why do you run your inverters when on the road if you don't need them to do anything? I leave mine off unless needed...why subject them to the extra wear and tear?
Not one of the two folks referenced in the quote, but I have a 2KW PSW inverter that stays ON all the time. I don't think "wear and tear" is a concern as it's been on for seven years with no problem. We always have something that requires 120vac running even when on the road, laptops, refer, microwave, crock pot, phone battery charger, GPS, etc...
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Old 03-09-2014, 09:47 PM   #37
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Inverter for TV, DVD and other small stuff, Genny for microwave, air conditioners, coffee maker and other big draw items
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Old 03-09-2014, 09:49 PM   #38
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We run our 2800W Magnum basically 24/7. When on the road and if we don't need the generator for AC I don't see any problem running the microwave to make popcorn and or other short term uses. By running the inverter all of our clocks, my 4g router and other odds and ends keep working. We also have our residential refer on the inverter circuit. OTOH, if we were so cold that we needed space heaters to supplement the furnace...on comes the generator.
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Old 03-09-2014, 10:03 PM   #39
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You have an alarm clock in your RV?
Why not, we live in it full-time; it's not a vacation RV. So there are plenty of times when we have to set alarms to get to appointments, volunteer commitments, etc. Just because we're retired doesn't mean we just sleep late and sit around the house.
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Old 03-09-2014, 10:07 PM   #40
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Kinda what I was thinking. When I read the post I thought it looked strange. Maybe somebody has the wires crossed in their head, and the 2K is on the fridge.
Even that is silly. Samsung says that our RF197 can run with any inverter capable of ~11 amps peak load which means that even a 1000 W inverter would be fine. As I said we have our fridge running on a 15A subpanel off of the inverter with an additional 20 A panel serving the rest of the lighting and TV load. We don't bother to power the microwave, A/C's, washer/dryer or hot water heater off of the inverter; that's when the generator gets turned on.
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Old 03-10-2014, 11:30 AM   #41
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Hi Ho: Maybe your PhD needs a refresher. 11 amps X 120 volts = 1320 watts. And for what it's worth the Xantrex SW1000 (a 1000 watt sin wave inverter) will not power most residential refrigerators.

Also, I fail to see why running an inverter all the time causes any problems. Solid state devices don't have a wear out mechanism that effects us in our lifetime. What does wear out is relays, so remove as much load from the electrical system as possible (i.e. turn off the A/C etc.) when switching from one power source to another.
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Old 03-10-2014, 12:55 PM   #42
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Even that is silly. Samsung says that our RF197 can run with any inverter capable of ~11 amps peak load which means that even a 1000 W inverter would be fine. As I said we have our fridge running on a 15A subpanel off of the inverter with an additional 20 A panel serving the rest of the lighting and TV load. We don't bother to power the microwave, A/C's, washer/dryer or hot water heater off of the inverter; that's when the generator gets turned on.
Before continuing to use terms like, "down right ridiculous", "nuts" and "silly" to describe how Fleetwood engineered the implementation of the residential refrigerator and required inverter combination for the Expedition, you need to better understand the situation.

I suspect the Magnum 2800watt Inverter/charger was chosen as much for the 125A charger (to maintain the extra batteries added to support the refer option) as it was for the size of the inverter. Not too many 600-1000 watt inverters offering a 125A charger. I think your faulty math proved that a much smaller inverter would not do the job anyway.
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