ResMed Power Station II kit for S8 VPAPs. This RPS II Kit is intended for the S8 VPAP® Auto and VPAP® Auto 25. This kit will not work for the S8 CPAP Elite, Escape or AutoSet. The S8 VPAPs® are 24 Vdc machines, while the Escape, Elite and AutoSet are 12 Vdc. This all-in-one pack provides power and backup power for ResMed ventilators and sleep therapy devices, with no need for a separate converter.