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.
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.