<span class="highlight">CPAP</span>, Invertors & generators etc

Submitted: Thursday, Jul 23, 2009 at 10:49

ThreadID: 70904 Views:3666 Replies:5 FollowUps:6

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wato35

I have a Hilux with a duel battery system and I run a CPAP and 40L Engel. Usually only get 1 night out of the battery for the CPAP, but the Engel will run another day. What size/brand genny do I need to regharge the 2nd battery daily and what price range are we talking?
I run an invertor for the CPAP that I have extended the length of the wire as they only give you 2mtrs, it now about 6 mtrs long. I used the same size wire, should I have used bigger wire?

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Reply By: Member - Troll 81 (QLD) - Thursday, Jul 23, 2009 at 11:11

Thursday, Jul 23, 2009 at 11:11

I don't know much about CPAP so I did a little google and found this good informative site CPAP and Battery Power

How big is your second battery?

I use a Honda 1KVA gennie with a 3 stage charger

AnswerID: 375811

Follow Up By: wato35 - Thursday, Jul 23, 2009 at 11:29

Thursday, Jul 23, 2009 at 11:29

its a deep cycle battery, not sure to actual capacity. Actual size is about that of a normal crank battery. Currently I am 4000k's from my vehicle.

Wato

FollowupID: 643139

Follow Up By: Maîneÿ . . .- Thursday, Jul 23, 2009 at 12:16

Thursday, Jul 23, 2009 at 12:16

probably would be 80 ah minimum

Maîneÿ . . .

FollowupID: 643145

Reply By: dbish - Thursday, Jul 23, 2009 at 11:15

Thursday, Jul 23, 2009 at 11:15

Its beter to keep the 12V lead to the battery as short as possible. The 240V lead doesnt mater how long it is with in reason.

AnswerID: 375812

Follow Up By: wato35 - Thursday, Jul 23, 2009 at 11:31

Thursday, Jul 23, 2009 at 11:31

I have it at 6mtrs as I cannot always get the truck near to the camper. Should I put thicker wire on it?

FollowupID: 643140

Follow Up By: Maîneÿ . . .- Thursday, Jul 23, 2009 at 12:16

Thursday, Jul 23, 2009 at 12:16

. . . yes

Maîneÿ . . .

FollowupID: 643146

Follow Up By: Lex M (Brisbane) - Thursday, Jul 23, 2009 at 14:22

Thursday, Jul 23, 2009 at 14:22

Depends how thick it is now.

FollowupID: 643161

Reply By: Mandrake - Thursday, Jul 23, 2009 at 11:56

Thursday, Jul 23, 2009 at 11:56

Do you need the generator or would the same amount of money spent on solar panels be better ?
You could have a look at my Solar Power Calc and see if it is economic or not ..
Its in the fileswap under Calculators etc...

Cheers

Steve

AnswerID: 375818

Reply By: Maîneÿ . . .- Thursday, Jul 23, 2009 at 12:27

Thursday, Jul 23, 2009 at 12:27

to run a small fridge direct and a cpap machine via an inverter, you need to replace what you use "obviously" so just figure out the current draw of both items is for a 24 hour period, then you need to be able to replace that in just 8 hours of sunlight if you use normal solar panels.

Maîneÿ . . .

AnswerID: 375819

Reply By: Mitch - Thursday, Jul 23, 2009 at 15:33

Thursday, Jul 23, 2009 at 15:33

Wato35 I run a 3rd battery for my CPAP machine (and hydrator) and camp lights. It All 3 are 100 amp hours and are interchangeable. Used 6 BS sized wire with an Anderson Plug connection. Have just returned from 10 weeks away up north, sometimes had 2 or 3 days in camp without electrical dramas. 2nd battery runs the Autofridge and the 1st battery starts the 80 series TD.

Cheers
Mitch

AnswerID: 375833