SailNet Community - View Single Post - Updating electrical system
View Single Post
post #9 of Old 12-10-2012
Maine Sail
Senior Member
Maine Sail's Avatar
Join Date: Jan 2003
Location: Maine Coast
Posts: 6,412
Thanks: 22
Thanked 305 Times in 236 Posts
Rep Power: 18
Re: Updating electrical system

Originally Posted by dszerlag View Post
I just purchased a 87 Pearson 39 and plan to refit the boat. There is very little equipment on the boat, no batteries, older charger, etc.
This can actually be a good thing as it allows you to start from scratch.

Originally Posted by dszerlag View Post
I will be keeping the boat on a mooring for the foreseeable future and would like some thoughts, insights on the most practical way to power the boat.
Your alternator should be used to get the bank back to 80-85% state of charge. From there you will want to use solar to "top up" during the week when the boat is sitting idle. Getting batteries back to 100% SOC is perhaps the most important aspect to longevity. Chronic undercharging is what kills most batteries on mooring sailed boats because alternators alone rarely if ever get a battery bank on a sailboat back to 100% SOC. The article below should help.

Installing A Marine Solar System

If you don't have much space for a panel consider a Solbian panel on a bimini.

Installing A Solbian Solar Panel

Originally Posted by dszerlag View Post
This year I would like to get the basics installed and then be able to add a wind generator next year or so.
Wind will depend entirely upon where you are located. Solar very often outperforms wind in many ares of the US.. There are only three wind gens I would even consider installing. The Airmaax, the D-400 and the Superwind and they are all quite expensive, but you get what you pay for.

Originally Posted by dszerlag View Post
My thought is to go with 2 bank, one isolated starting battery and two house batteries. I would like to be able to use solar to keep charged while on mooring and maybe more if doable.
Again read the article above for solar. It can be done very reasonably. A charge management device such as a Echo Charge, Balmar Duo Charge, Blue Sea ACR or Yandina combining relay will all work very well to keep the start battery topped up.

Originally Posted by dszerlag View Post
I've read so much, including all of Nigel's book and articles but wondering what other people have done. Thanks in advance for any and all info, thoughts.
There are many ways to skin the cat but suffice it to say, within reason, you can never have too much battery capacity.... Also a battery monitor will be some of the best money spent..

Installing A Battery Monitor

-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.

Last edited by Maine Sail; 12-10-2012 at 05:38 PM.
Maine Sail is offline  
Quote Share with Facebook
For the best viewing experience please update your browser to Google Chrome