Robin's Corner | How Big of a Battery Do I Actually Need for Back Up?

First thing you need to ask yourself is this…how many amps does it take to run the item per hour (water pump, trolling motor, laptop, or cell phone) and then how many hours a day do you want to run it.

Example: you have a 12 V water pump that takes 1 amp per hour and you want to run it for 2 hours a day which would equal 2 amps a day. 

So the battery that you would want would have to be big enough to run for several days so a 10 amp battery would work for 5 days and a 20 amp battery would work for 10 days.

Robin 

 "Complicated thinking doesn’t always answer the question."