I've been planning for prepping for several years, and am finally getting around to the CPAP.

I have a model that uses a transformer to convert 120V AC to 12V 5A for the actual appliance. I have an adapter that can connect to a 12V battery.

Does anyone have suggestions for a longer term, off-the-grid, battery and charging solution?

My general prepping philosophy is to minimize reliance on electricity because of the requirements for generators, outside fuel sources or expensive solar systems, but some things need electricity.

Thanks.