Your BiPap pro works on 12VDC. It is silly to take house 12V through inverter to 115V through transformer (converter) cord back to 12VDC
...Much better to spend $23.95 on the 12VDC cord specifically for your BiPAP Pro:
http://www.directhomemedical.com/1001956-dc-power-cord-cpap.html#.Uie8HT9C6VU
http://www.cpapwholesale.com/respironics-remstar-cigarette-lighter-adapter-cable-for-cpap-machines
http://www.cpapxchange.com/1001956-12v-dc-cord-respironics-devilbiss-covidien.html
"This Shielded 6-Foot 12V DC Power Cord can be used to plug many CPAP & BiPAP machines into the "cigarette" style outlets found in most cars, boats, trucks, and other vehicles. It is compatible with a wide range of machines from Philips Respironics, Covidien, and DeVilbiss Healthcare....It will also work with many older systems including the REMstar, REMstar with C-Flex, REMstar Lite, REMstar Plus, REMstar Pro, REMstar Pro2, REMstar Auto, and the Respironics BiPAP Pro."
