solar power for dry camping & cpap machine

TxGregory wrote:
I am guessing that 3 panels and a 3000W inverter, on a sunny day, would allow me to run everything just as if I was plugged into power.

"Everything"? ... hardly. :R Assuming your trailer is wired with 30 amp 120 vac service that's 3,600 watts so although you could simply plug your trailer's main service cable into an inverter output and thereby apply power to every 120 vac circuit in the trailer (referred to as "whole house") you'd obviously be limited to the capacity of the inverter and battery bank supplying it. You'd also have to turn off the converter when doing this so as to not create a closed loop, along with making sure that other devices such as the fridge and water heater electric heating option (if it has one) are turned off so as to not place an unnecessary load on the battery & inverter. From your description it sounds like you have limited understanding of what is involved so I'd suggest you find someone else who does have the knowledge to help sort out the best solution for your particular situation. I've done "whole house" myself, some will go another step further and wire in an automatic transfer switch, but I'd suggest the better solution if all you're wanting to do is power a few select devices is to wire in a couple of dedicated duplex receptacles inside the camper that are fed directly by the inverter, just as I've done (10 pics). Leave the inverter off when it's not being used and you won't unnecessarily draw down the batteries, turn it on only as needed ... simple, but you do have to know what you're doing. :)