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Old 06-16-2021, 08:12 PM   #1
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Inverter / Charger - Modified to Pure Suggestions Requested

Just got a new 21 year old 2000 Fleetwood Southwind.

I found out that the installed inverter / charger is Freedom 81-2010-12, which is a 2000 watt modified sine wave. Due to medical equipment and sensitive electronics I think I'm going to need to replace it with a pure sine wave unit.

I saw this Samlex 2200 (see pics) and I wanted to ask for opinions on if this is a good option. I'm pretty sure I'll have to replace the control panel in the RV also with Samlex's one.

Samlex also has a 3000 one that I'm considering.

Thanks for any input!
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Old 06-16-2021, 08:28 PM   #2
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Are you stuck on 2200 watts? Xantrex Freedom XC2000 is considerably cheaper, and a lot of folks run them with no problems.
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Old 06-16-2021, 08:58 PM   #3
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If your medical equipment is run of of a power supply that converts ac back dc. You can make your own 12v dc to dc power supply. My cpap is 24vdc and 90watts of power. So I bought this boost buck converter and made my own power supply I can plug into the charge port next to the bed.

https://smile.amazon.com/dp/B08246FB...HWRDAWVP20BY1E


I found a little plastic box to mount it in at Walmart

The Beadery Mini Utility Plastic Box

http://www.walmart.com/ip/The-Beadery-Mini-Utility-Plastic-Box/736053421


Now I can run off 12vdc or 110vac.


The out put voltage and amps is on the power supply. The end that plugs into you device will have to be the right size I measured mine with calipers and ordered off Amazon.

This is a lot cheaper than changing out your inverter.
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Old 06-16-2021, 09:04 PM   #4
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If you stay with the same size inverter you can use the same wiring. But if you go larger you will have have to upgrade the wiring and fuses for it.
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Old 06-16-2021, 10:16 PM   #5
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I found a picture of my dc to dc power supply. Very simple to make
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Old 06-16-2021, 11:27 PM   #6
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So a couple of observations by just skimming the manual.

This unit support one hot line in so if your have a 50amp coach it will not work, you need 2 hot lines. Also the pass though amps are rated low at 18 amps and charge current at 15amps so only 18 available to the coach side of power even on shore power. This is in chart 3.2 of the manual.

It does not support other battery types like lithium as far as I can see so if you upgrade latter you would need to swap it out.

I did just skim the manual so I may be incorrect on what I saw.

A lot of the inverter/charger units today are hybrid so it allows for more load to be supplied if the shore power is low amps. So on a 20amp shore power and you need 25 it will pull the 5 amps from the battery’s to supply the needed 25 amps.

My opinion would be to look at the magnum or Victron units for a bit more $ you can get a 3000 watt unit but look at your wire and make sure it can handle it. Both those manufacturers make smaller units also in the 2000 range.
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Old 06-17-2021, 11:16 AM   #7
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HarryStone, Not stuck on 2200, it's just that that's what the Samlex is. I've always had good experiences with smaller automobile pure sine wave inverters from them, that's why I was looking at them first. Per your suggestion I looked at the Freedom XC2000 and that looks pretty good, plus I might be able to use my existing control panel with it. I'll have to call them to confirm. Thanks!
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Old 06-17-2021, 11:17 AM   #8
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nvs402,

Thanks for the info, I'll definitely look into it! I'll probably make a couple of them.
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Old 06-17-2021, 11:41 AM   #9
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Biljol,

Thanks for looking that up. You made good points. I think I'll stick with the Xantrex for simplicity, and keep it at 2000 because at this time I don't feel like doing rewiring. Thanks!
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Old 06-17-2021, 12:06 PM   #10
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Interesting points you all have made. I started to pass by this post but glad I took the time to read it. Always something new to learn.
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Old 06-17-2021, 02:06 PM   #11
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There is a factory outlet store, you can get the inverter there for a bit less.
https://xantrex.factoryoutletstore.c...0aAuE5EALw_wcB
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