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Old 03-08-2020, 09:05 AM   #21
Rocketsled
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Those of you looking to power a CPAP, look into running it off 12v DC. I have a 220 Wh battery pack and it'll drive the CPAP 4-5 times longer off DC than it will through the inverter. (10 times longer if you leave the humidifier portion off)

FWIW, 2000 watt inverters will run a microwave or coffee maker by itself.
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Old 03-08-2020, 04:33 PM   #22
rlh1957
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WOW 5000 to 7500 Watt Inverter? You must have 12 BattleBorn batteries and a rooftop full of solar panels to recharge them.
How do you do it?
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Old 03-08-2020, 05:02 PM   #23
GHen
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5-7000 watt inverter is overkill unless you need to run the A/C, coffee maker, heater or Microwave at the same time. Might as well install a large generator, and probably cheaper.

I will be replacing my 750watt inverter with a 2000 so I can run a microwave or coffee maker ( not at the same time), but donít need anything more draining my batteries.
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Old 03-08-2020, 07:23 PM   #24
pitman44
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Quote:
Originally Posted by Rocketsled View Post
Those of you looking to power a CPAP, look into running it off 12v DC. I have a 220 Wh battery pack and it'll drive the CPAP 4-5 times longer off DC than it will through the inverter. (10 times longer if you leave the humidifier portion off)

My DW uses a CPAP. I'm not sure how you'd run it off 12vdc. Is it one that's designed to use 12vdc out of the box or a modification to a 120vac unit?
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Old 03-08-2020, 07:36 PM   #25
Rocketsled
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Quote:
Originally Posted by pitman44 View Post
My DW uses a CPAP. I'm not sure how you'd run it off 12vdc. Is it one that's designed to use 12vdc out of the box or a modification to a 120vac unit?
Search for the CPAP name and 12v, mine seems to work well with this:
Philips Respironics Shielded DC Cord for DreamStation CPAP https://www.amazon.com/dp/B01FT8QUNI..._uKBzEb2C0VETT
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Old 03-08-2020, 07:39 PM   #26
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Quote:
Originally Posted by pitman44 View Post
My DW uses a CPAP. I'm not sure how you'd run it off 12vdc. Is it one that's designed to use 12vdc out of the box or a modification to a 120vac unit?
Most (not all) CPAP equipment operates on 14 +/- 2VDC (12-16 volts). Almost all machines plug into 120 VAC outlets, and have a "brick" that converts that 120VAC to 13.8VDC for most machines. Many brands do have a DC/DC converter that will plug into a 12 volt RV or car electrical system and "condition" that voltage to meet the input voltage requirement for that specific brand equipment.

So, while your DW's CPAP plugs into the wall outlet at home, that "brick" converts the wall voltage to a DC voltage that powers her CPAP. If you look at the "brick" it should have a "nominal output voltage" listed on the tag. That would tell you whether you can operate it in your RV with "just a straight power cord" or if you'll need a DC/DC converter to power it from the RV battery.

That said, many (maybe even most) have a small 100 watt inverter that they plug into the RV 12 volt system and just run the CPAP off the 120 volt inverter output, which powers it just like they do at home.
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Old 03-08-2020, 07:49 PM   #27
moparmad
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I would just run two transfer switches. keep one on shore power and possible gen upgrade going to the second one which would have the inverter on it. and keep the converter on the first transfer switch that way it will not be powered up when it switches over to inverter, that way you will not have to worry about turning off or unplugging converter, it will be automatic. or get one that has one built in.
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Old 03-10-2020, 08:22 AM   #28
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https://battlebornbatteries.com/shop...charger-2000w/
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