SailNet Community - View Single Post - Battery capacity - Peukert stuff
View Single Post
post #7 of Old 10-07-2012
Maine Sail
Senior Member
Maine Sail's Avatar
Join Date: Jan 2003
Location: Maine Coast
Posts: 6,410
Thanks: 22
Thanked 305 Times in 236 Posts
Rep Power: 18
Re: Battery capacity - Peukert stuff

The Peukert number for a given battery does not change when the individual batteries are placed in parallel. For example a 100Ah 12V battery with a Peukert of 1.25 will still have a bank Peukert of 1.25 when you have four in parallel for 400Ah's. So the Ah capacity of the 4 100Ah batteries in parallel is 400Ah's with a Peukert of 1.25.

One one hundred Ah battery will support a 5A load for 20 hours before hitting 10.5V

Four 100Ah batteries wired in parallel will support a 20a load for 20 hours before hitting 10.5V. Go above the 100Ah load of 5A, with a single 100Ah battery, and you have less capacity. Go above the 20A load on a 400Ah bank and you also have less capacity. Conversely use less than 5A or 20A and you'll get more than 100Ah's or 400Ah's....

-Maine Sail / CS-36T

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Images In Posts Property of Compass Marine Inc.

Maine Sail is offline  
Quote Share with Facebook
For the best viewing experience please update your browser to Google Chrome