I have a 120vac CPAP machine which is 15 years old. It draws 2A for the blower and 2A for the water heater. I do not have an inverter in my new Lance 1040. What make and model of CPAP machine op...
When I have used mine with DC the humidifier does not work. I have a Respironics. There is a little condensation on the hose, but I have never missed the humidifier. There is a portable that fits in your hand and can run on it's own battery for 2 nights.