CPAP and battery power
My old RV had invertor output next to the bed, the new one does not and there is no handy spot to tap 12V. My idea is this. Buy a 120V relay with double throw 120v contacts. Remove the 12 volt feed fr...
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I ran 8 gauge wires from the battery to a junction box under the bed, then 10 guage wire from the solar panel goes to that junction (thru a controller), and a 12 gauge wire goes to a 12 volt outlet by the bed for the cpap. I also plug in a 400 watt portable inverter into that 12 volt outlet when I want to run or charge my laptop, electric razor & cellphone. The smaller wires that feed the 12 volt outlet by the TV don't seem to provide enough juice to run the 400 watt inverter without chatter.
When boondocking, I don't use the humidifier on the cpap, and using it only on 12volt, it will only take my two 6 volt Trojan batteries down about 1/10 to 2/10 of a volt after a full nite of use + water pump use + LED lites on for 4 hrs. It would probably take another 2/10 of a volt drop if I used the humidifier, though I haven't tried that.
When boondocking, I don't use the humidifier on the cpap, and using it only on 12volt, it will only take my two 6 volt Trojan batteries down about 1/10 to 2/10 of a volt after a full nite of use + water pump use + LED lites on for 4 hrs. It would probably take another 2/10 of a volt drop if I used the humidifier, though I haven't tried that.
