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techntrek ![]() Admin Group - pHp ![]() ![]() Joined: 29 Jul 2009 Location: MD Online Status: Offline Posts: 9059 |
![]() Posted: 21 Jun 2012 at 11:17am |
I didn't re-read much of this thread, but here's a 4-page discussion you can look at.
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techntrek ![]() Admin Group - pHp ![]() ![]() Joined: 29 Jul 2009 Location: MD Online Status: Offline Posts: 9059 |
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I recommend a DPDT switch, switching L1 and neutral. Better yet, take a look at this $50 automatic transfer switch: http://www.solar-electric.com/pomaxpmautrs.html
Some inverters (especially modified sine wave) won't work right or will be damaged if you don't switch both lines.
Something else to consider - make sure you have enough battery reserve so you don't damage the battery by running it down too low. From CPAP discussions I've seen on a solar forum I visit, usually the machine itself isn't a very big load. The problem is when you turn on the heater to add moisture. That is a very large load, and unless you have 3-4 batteries is probably too large of a load. If she can go without the heater you should be good. If she must have the heater expect to enlarge your battery bank.
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Seanl ![]() Senior Member ![]() ![]() Joined: 19 Sep 2011 Location: Fredericton NB Online Status: Offline Posts: 633 |
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My wife uses a CPAP machine that she needs to sleep. It draws quite a bit of power so I needed a fairly high power Inverter. High power inverters need to have either short wire runs or really big wires. In the past I have tapped right off the 12 volt terminal on the converter and ran an extension cord to the CPAP Machine but this year I wanted to install a plug next to the bed so that I would not have a long cord going from one end of the trailer to the other. There was already a plug where I wanted it so my Idea was to install a switch that would let me change from shore power to the inverter when we had to shut down the generator and she could use the same plug regardless of the power situation. This drawing is what I came up with. all of this wiring is under the dinette bench with the electrical panel and I have mounted the inverter there as well. I will post pictures of the install when it is done. The only Thing that is missing from the schematic is there is a 60amp inline fuse in the 12volt line for the Inverter. Excuse the missspelling of schematic in the drawing just noticed it.
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Sean, 2011 Rpod RP-173,2009 Jeep Liberty Rocky Mountain Edition
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