Members' Online Book: Cruising Boat Electrical Systems, Chapter 6 of 22

Cruising Boat Electrical System Design, Part 3—Specifying Optimal Battery Bank Size

Published Jan 23, 2019 47 comments Updated February 27, 2019

In Part 1 and Part 2, we took a deep and considered dive into analyzing the electrical loads on our boats and thinking about ways to reduce said loads through smart systems thinking.

(If you have not read those articles, please do so now, otherwise this one will make no sense to you.)

In this chapter we get the payoff for all that hard work: How to calculate optimal battery bank size or, alternatively, how to live with the bank we have. And I have built a spreadsheet to make the whole process easier.

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Book Chapter Navigation:

<< Cruising Boat Electrical System Design, Part 2—Thinking About Systems

How Batteries Get Wrecked and What To Do About It >>

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Meet the Author

John

John was born and brought up in Bermuda and started sailing as a child, racing locally and offshore before turning to cruising. He has sailed over 100,000 miles, most of it on his McCurdy & Rhodes 56, Morgan's Cloud, including eight ocean races to Bermuda, culminating in winning his class twice in the Newport Bermuda Race. He has skippered a series of voyages in the North Atlantic, the majority of which have been to the high latitudes. John has been helping others go voyaging by sharing his experience for twenty years, first in yachting magazines and, for the last 12 years, as co-editor/publisher of AAC.

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Anchoring Made Easy—Technique

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The critical issues that you need to understand before you buy a cruising boat. Time-tested tips to help you determine what really matters.

Lessons from Losses at Sea

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Maintaining a Cruising Boat

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The fruits of a combined century of navigation, much of it before electronic gadgets, and then we relate that experience to modern electronic navigation.

Offshore Sailboat Design

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Nothing on this website or in direct communications received from us, or in our articles in the media, should be construed to mean or imply that offshore voyaging is anything other than potentially hazardous. Dangers such as, but not limited to, extreme weather, cold, ice, lack of help or assistance, gear failure, grounding, and falling overboard could injure or kill you and wreck your boat.

Decisions such as, but not limited to, heading offshore, where you go, and how you equip your boat, are yours and yours alone. The information on this web site is based on what has worked for the authors in the past, but that does not mean it will work for you, or that it is the best, or even a good way for you to do things.