Generator "quiet box"

[BFlinn181]

These are much smaller than needed to power an A/C, but would work for a CPAP and TV.

https://www.youtube.com/watch?v=dwqyp5cnadA

[Forest Grump]

There are other things to consider other than sound level, is it CARB approved, does it have a USFS APPROVED muffler for example. Plus quiet hours, love those quiet hours.

[Old Crows]

OH my!!! This looks like a solution looking for a problem.

There's not battery bank and inverter/converter on board? You need a 'simple' solution here not a dog house....

That CPAP unit should run all day with the on board battery and a converter/inverter ..... Or, just on 12V. ??? Your trailer doesn't have an inverter/converter/charger??? No 12V wall plugs????

The alternative is to use a high wattage 'jump pack' battery with a 110V inverter set up and/or 12V cigarette plugs. That should carry all night. Plug it in to charge it up when not in use. EasyPeasy!

As to running generators to make coffee. Can't say I've not done that.... but it's less annoying to neighbors to use the inverter/converter.... SILENT.... all you hear is the perky goodness being made.....

[doorfx]

These are as quiet as any Honda in the same class

Plus you can parallel them to double your running wattage to 3200 ( Canada) 3400 (USA).

[pasdad1]

Originally Posted by doorfx

These are as quiet as any Honda in the same class

Nope, that myth has been busted already. The deception is that Champion publishes the Db rating with the generator under "no load" ! And Honda publishes the Db rating with the generator producing the full rated load.

The other deception sometimes used is to increase the distance from the generator at which the Db rating is measured.

😃

[Forest Grump]

Originally Posted by Old Crows

OH my!!! This looks like a solution looking for a problem.



There's not battery bank and inverter/converter on board? You need a 'simple' solution here not a dog house....



That CPAP unit should run all day with the on board battery and a converter/inverter ..... Or, just on 12V. ??? Your trailer doesn't have an inverter/converter/charger??? No 12V wall plugs????



The alternative is to use a high wattage 'jump pack' battery with a 110V inverter set up and/or 12V cigarette plugs. That should carry all night. Plug it in to charge it up when not in use. EasyPeasy!



As to running generators to make coffee. Can't say I've not done that.... but it's less annoying to neighbors to use the inverter/converter.... SILENT.... all you hear is the perky goodness being made.....

Nope, it's not wattage that counts it's AMPs. This is a typical batter used in a jump starter:

<<12v 12ah TR12-12A SLA Battery with Nut & Bolt Terminals $36.00
********** IN STOCK **********
TR12-12A Tempest AGM, Valve Regulated, Maintenance Free, Sealed Lead Acid Rechargeable Battery - 12V 12Ah (20 hour rate)

You may also use the battery listed below for the same application.
TD12-12A for Deep Cycle applications & longer cycle life
12 volt, 12 Ah for Generators, Jump Starters, and General Purposes.

TR12-12 Dimensions:
Length 5.94", Width 3.90", Height 3.74" (Total Height 4.18"), T25 terminals .250", Approx Weight 8 lbs.

Can't find the right battery? Click Here (or click 4v 6v 8v 12v 24v)
For Battery Cable Assemblies Click Here
For Battery Cycle Life Chart Click Here
For Terminal Information Click Here
For MSDS (Material Safety Data Sheet) Click Here

Service Life Under Float Service @77°F. 4 to 6 Year. 2 Year Warranty under Float Service.
NonFloat Service / 1 Year Warranty.

Important Battery Charging Information (Click Here)>>

12 amps, that all.

[Old Crows]

Originally Posted by Forest Grump

Nope, it's not wattage that counts it's AMPs. This is a typical batter used in a jump starter:

<<12v 12ah TR12-12A SLA Battery with Nut & Bolt Terminals $36.00
********** IN STOCK **********
TR12-12A Tempest AGM, Valve Regulated, Maintenance Free, Sealed Lead Acid Rechargeable Battery - 12V 12Ah (20 hour rate)

You may also use the battery listed below for the same application.
TD12-12A for Deep Cycle applications & longer cycle life
12 volt, 12 Ah for Generators, Jump Starters, and General Purposes.

TR12-12 Dimensions:
Length 5.94", Width 3.90", Height 3.74" (Total Height 4.18"), T25 terminals .250", Approx Weight 8 lbs.

Can't find the right battery? Click Here (or click 4v 6v 8v 12v 24v)
For Battery Cable Assemblies Click Here
For Battery Cycle Life Chart Click Here
For Terminal Information Click Here
For MSDS (Material Safety Data Sheet) Click Here

Service Life Under Float Service @77°F. 4 to 6 Year. 2 Year Warranty under Float Service.
NonFloat Service / 1 Year Warranty.

Important Battery Charging Information (Click Here)>>

12 amps, that all.

That's right... almost always 12V/12A from the battery. I've replaced them several times in my portable power sources.

The porta-power/jump starters generally advertise their starting amps and power output from the built in inverter. Here's an example...... in watts, 400 on the 110V inverter.

Wagan Power Dome EX 400-Watt Jump Starter Review

That should be adequate to run a CPAP for awhile. If not .... get two.

[pasdad1]

Originally Posted by Forest Grump

12 amps, that all.

Which is still a larger capacity battery than the ones sold for the express purpose of powering a CPAP device.

Reference my post from above....
http://www.irv2.com/forums/showpost.php?p=2714604

That battery sold to power a CPAP from between 5 and 20 hours (based upon the air pressure the machine has to provide- higher pressure obviously means shorter runtime) is rated as 100 Wh. (Watt hours) The jump starter is a 12volts x 12 amps = 144 Wh battery.

The jump starter I recommended has a 18 Ah battery...... This can easily run a CPAP without heated humidification (using the 12v adapter).

[Forest Grump]

Inside just a battery, converter and a circuit board.

[pasdad1]

Here is the final proof that the 18Ah portable jump starter is a good choice to run the CPAP machine overnight.

Directly from ResMed the top maker of CPAP machines.....and I have the S9 Autoset myself.

http://www.resmed.com/us/dam/documen...de_glo_eng.pdf

[BFlinn181]

Some folks seem to have missed the OP's clarification in Post #25, of why they want a generator. All this blustering about batteries to run a CPAP machine are moot in this thread.

"I wasn't clear about the uses of the generator. I also need it to run my 13,500 AC unit and other items such as a TV, computers, etc."

[pasdad1]

Originally Posted by BFlinn181

Some folks seem to have missed the OP's clarification in Post #25, of why they want a generator. All this blustering about batteries to run a CPAP machine are moot in this thread.

"I wasn't clear about the uses of the generator. I also need it to run my 13,500 AC unit and other items such as a TV, computers, etc."

Yes, I know. But for other people reading the entire thread, I wanted to be sure they got the correct information - That a portable "jump starter" type battery CAN run their CPAP machine just fine ! Naysayers would have people doubting it would work, when it works just fine !

[doorfx]

Originally Posted by pasdad1

Nope, that myth has been busted already. The deception is that Champion publishes the Db rating with the generator under "no load" ! And Honda publishes the Db rating with the generator producing the full rated load.

The other deception sometimes used is to increase the distance from the generator at which the Db rating is measured.

[emoji2]

Never was much for published numbers. Standing right beside my buddies 2000 Honda and standing right beside the champion there is no perceptible difference to my human ear the DW and Buddy actually think the champion is quieter when we ran them at the same time side by side.
Now the Honda is 4-5 years old and the champion has 10 hours on it. Bottom line is I can buy three of these for one Honda. $499 on sale here in Calgary so I am very pleased with them. My neighbors in the campground didn't even know I had a generator lol

[Forest Grump]

Originally Posted by pasdad1

Here is the final proof that the 18Ah portable jump starter is a good choice to run the CPAP machine overnight.

Directly from ResMed the top maker of CPAP machines.....and I have the S9 Autoset myself.

http://www.resmed.com/us/dam/documen...de_glo_eng.pdf

Attachment 104786

It depends upon the current draw of a particular device and its settings. One would expect a portable device to use a pretty small battery. Portable starters have a 10 to 20 amp battery. That's it. Check your device and see what it requires.