Imaging - Power Requirement

[Sirius19]

I am trying to figure out the size of a battery or power pack to purchase.
Do you think this is correct ?
Atik Camera = 1 amp/hr
Telescope = 4.5 amp/hr
Laptop = 4.5 amp/h
Total = 10 amp/hr
For  5 hours viewing re
W= 10a x 12V = 120W/h x 5= 600w

[theoatc]

I am trying to figure out the size of a battery or power pack to purchase.
Do you think this is correct ?
Atik Camera = 1 amp/hr
Telescope = 4.5 amp/hr
Laptop = 7 amp/h
Total = 12.5 amp/hr
For  5 hours viewing re
W= 12.5a x 120V =

telescope mounts draw full power only when are used to full speed.When tracking doesn't consume more than 1-1,5 amp/h.
Regarding your calcs , u need a battery over 50 ah ,for a safe 6 hours run. It is always dependable with the weather. If it is cold ,then the run will be shortest