Traveling in a motorhome with CPAP

[Patrick A]

Okay, so I will not use the CPAP while driving. Very good advice..........

Tonight is the big night. From what all of you are saying, I should have no problem. The fact is that I have 4 batteries at 225 amps each. Using the " simple " formula and calculating at 180 watts, that is 15 amps. If I sleep for 7 hours, that is only 105 amps...........plenty of battery power.

Have a happy 4th,
Linda

linda I hope you had a great night of sleep I would suggest that you read thishttp://www.marxrv.com/12volt/12volt.htm

[SleepyTiger]

As an electrical engineer...
(b) If your battery's capacity is 200 amp-hours, then it would run for 20 hours on the battery (10 amps x 20 hours = 200 amp-hours)

In THEORY your 200 amp-hour battery will provide 20 hours.

However in PRACTICE it is very bad for the battery (even the deep-cycle types) to draw them all the way down to zero.

The rule of thumb for deep-cycle batteries is to never discharge them more than 50%. (The ResMed battery page also indicates this). Thus 100 a-hrs out of a 200 a-hr battery.

S/T

[SleepyInSeoul]

In THEORY your 200 amp-hour battery will provide 20 hours.

However in PRACTICE it is very bad for the battery (even the deep-cycle types) to draw them all the way down to zero.

The rule of thumb for deep-cycle batteries is to never discharge them more than 50%. (The ResMed battery page also indicates this). Thus 100 a-hrs out of a 200 a-hr battery.
S/T

SleepyTiger - thanks for posting this. I just gave some simple theoretical calculations, as I stated. Your point is well noted.

[linda12345]

Hooray! Great night sleep. No problem with the batteries....last entire night with much room to spare. Thanks to all of you who gave me information and advice. Without you, I probably would have been up all night worrying about the batteries. And even more, I now understand the electrical/battery system a little better.

Linda