This might be interesting, Unitrends have just released a free version of their VMware vSphere and Microsoft Hyper-V backup solution for home labs. I have started testing by backing up Hyper-V lab, works well so far.
Backup and Recovery Continuous Data Protection Products - Unitrends
Backup and Recovery Continuous Data Protection Products - Unitrends
Unitrends Free™ is free backup software that quickly deploys as a virtual appliance in VMware vSphere and Microsoft Hyper-V environments. Designed in response to the virtualization community, Unitrends Free is the first solution built specifically for IT professionals seeking a free product to protect home labs and small environments. Unitrends Free protects up to 1 TB of data on virtual machines and is packed with enterprise features such as cloud integration and instant VM recovery.