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From: John Boy \ (no email)
Date: Wed Nov 30 2005 - 12:48:18 EST
i never understand why some insists on converting these 32v boats to 24!
Boy I sure wish there really wasn't a reason to convert to from the 32V system.
We are faced with the reality that we MUST convert from 32Vs soon and this reality has been coming for awhile.
I grew up with 32V systems as a marine engineer on Ohio River Tow Boats, as all the boats we had used 32V systems for engine starting, primary DC systems, and for all backup power. So when we looked at Mariah, (our 1969 trawler) I was not dismayed about the fact that she has 3--32V banks of batteries. Two for the house system, (each connected to the P/S main engines,-the 32V panel,-the pilot house panel,-or the generator bank via disconnect switches); and one for just the generators. We also have a bank of 2--12V gel cells in the pilot house for instrumentation, etc. This bank could be used for powering of the endless convenient items that are so readily available in 12V however, it is not wired as such and although it could be, it would not be the bank that I would want to be vulnerable to 'depletion' by something like 'the stereo' or the 'fan' for which power should be coming from the 'house bank'.
Reality of this change began, setting in when our 'senior citizen' Dytek inverter went TangoUniform while down island a few years ago. It was not repairable there, (really long, but good, story there) and once back in the States and at Wards in FL we found that there was no longer any data/ schematics for it and NO one could help us. I had already begun research on new 32V inverters / 'inverter/ chargers' and found that there were VERY FEW sources (and yes I uncovered them all including those in europe and those who would 'make one up') and what was available were VERY expensive.
However, ALL other 32V components are expensive, harder to find, and are getting more and more that way every day with many things we would like to have available not made for 32Vs at all and even if you can 'work with the 32V system' if a person looks ahead at all the future it's not there.
So--we knew then that the time was comming.
We did, with a 'not so minor miracle', find an amazingly helpful fellow in NY that worked for Dytek and designed the board for our inverter, (the internet is truly an amazing animal) sent it to him and got it repaired. However, reciently the inverter went T.U. again, a couple batteries in the house bank went T.U. (and they are all due).
So--we opperate without an inverter, I deleted one house bank, as they're monster banks and without an inverter their main function is to run the heads and the bilge pumps.
We will probably never go without one 32V system because ore ancient anchor windlass is 32V and I've been told it can not be rewound for 24. The 6KW gen-set is made with a 32V tap to charge the gen bank and it's starter would be expensive too. BUT, the good news is that the Delco starters for the Cat Mains and the 30KW gen-set are 24/32 volt. and the main alternators are actually 24V units with a tapping resistor, (mounted on the side of each block) to 'tell them' to produce 32. So the conversion will be less tramatic as first thought and the most expensive components, the inverter/charger and the batteries themselves, are toast anyway.
THE TIME HAS COME
BTW: I'll be going back to the boat next week in SXM so will really miss sharing with the list as I have here in the States. But I'll be reading the posts and working on putting together an internet connection from the boat to be able to participate again.
-----Original Message-----
From: Pascal Gademer <>
Subject: Re: T&T: Battery Life
i guess that's one of the benefits of Hatteras being one of the few builders
using a 32v system. My batteries are outside of the engine rooms, under the
galley with the generator. while the genset generates some heat, it's not as
bad as the mains. the higher voltage allows for longer cable runs... i never
understand why some insists on converting these 32v boats to 24!
I've also added a timer on the older Pro Mariner charger to limit charging to
about 6 hours the day.. this has reduced water consumption in half
pascal
miam, fl
70 hatteras 53my
John & Susan
Aboard MY "Mariah"
Gwynn's Island Trawler,62
-SXM-
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