Pure sine wave inverter suggestions?

Geewizard wrote:
I need to charge an electric dirt bike. Its charger is AC only and I will pay the extra for a pure sine wave inverter. I had a MSW inverter for my microwave and it really did not like the MSW.

My CPAP runs from 12VDC.

Thanks all.

Why not just boost the DC with something like THIS? There is a lot of loss converting DC to AC then back to DC