will it accurate?Yes, with vzmigrate is Ok to move SolusVM OpenVZ container to Proxmox v2
like this: http://wiki.solusvm.com/index.php/Migrating_OpenVZ_Virtual_Servers
Backup restore vzdump What commandsI do not know solus vm in detail but as far as I know you talk about OpenVZ containers?
e.g. with backup/restore, using vzdump.
Run on the SolusVM host:
vzmigrate -v --ssh="-p 22" IP.of.your.Proxmox 101
Run on the SolusVM host:
vzmigrate -v --ssh="-p 22" IP.of.your.Proxmox 101