Battery back up on Vectra m1

[saltlife757]

Quick question. Can you hook up a ECOTECH Vectra m1 to the "Vortech Battery Backup"?

If so, what is a rough estimated time the back up will last?

My thought is the back up is supposed to last around 18 hours for 2 mp40s. (About 40 watts give or take). It says the vectra m1 is about 80 watts. So would it be safe to assume the battery back up would about 9 hours for the vectra m1?

 

[twilliard]

Efficiency loss is also calculated for run time so it is hard to say the exact number of runtime hours.