[TenTec] emergency back up power

[John]

For some time now I have been toying with the thought of putting together a battery system to run my station during emergencies .  I have however little knowledge and no training or experience on how complete such a project .   My station consists of a Orion II , Centurion amp and a computer.  Can anyone point me in the right direction for help in building such thing ?  thanks John Molenda kb2huk