To provide fast, local vault access for backups and restores, back up Hyper-V data to a Satellite vault.
The data can then be replicated to a vault hosted by your service provider to ensure offsite protection in the case of a disaster.
If you choose not to use a Satellite vault, consider using a QuickShip vault (QSM) to seed Hyper-V backups locally. The data can then be imported into an offsite vault.