Here is the Resmed battery guide that assumes you are using their inverter to convert 12 V DC to 24 V DC. https://www.resmed.com/us/dam/documents/articles/198103_battery-guide_glo_eng.pdf The amount of current / power used depends on a number of factors. Mask pressure, humidity level, and use of he...

Here is the Resmed battery guide that assumes you are using their inverter to convert 12 V DC to 24 V DC. https://www.resmed.com/us/dam/documents/articles/198103_battery-guide_glo_eng.pdf The amount of current / power used depends on a number of factors. Mask pressure, humidity level, and use of he...

I guess the reason I'm a bit stumped is because hooking this up to a Killawatt meter it shows about 300wh for about 8hrs of use with humidity and tube turned on but it won't last 6 hours using this converter with 70ah battery? Is the converter going bad? Ah is not the same as wh: power (watts) is c...

I guess the reason I'm a bit stumped is because hooking this up to a Killawatt meter it shows about 300wh for about 8hrs of use with humidity and tube turned on but it won't last 6 hours using this converter with 70ah battery? Is the converter going bad?

I must be missing something. The DC-DC converters for these are terribly inefficient aren't they? Input is 12v/24v 13A/6.5A with an output of 24v 3.75A!!