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03-15-2018, 06:26 PM
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#1
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Veteran Member
City: Hilton Head Island
Vessel Name: Lady Maria
Vessel Model: 1987 CT 35 Sundeck
Join Date: Jul 2017
Posts: 49
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House battery bank
Interested in hearing what sort of battery bank set up folks are using. My house bank is tired and I’m developing a plan for the replacement.
Tbtapper
87 CT 35 sundeck
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03-15-2018, 06:44 PM
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#2
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Senior Member
City: Markham
Vessel Name: currently boatless
Join Date: Apr 2015
Posts: 280
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Hi TB
We have two 4D AGMs = 400ah capacity. I would like to have a third one but don't really have the space. OTOH we have 450w of solar charging capability, which is great. I encourage you to consider solar if you are designing a new house bank system. Good luck.
David
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03-15-2018, 07:49 PM
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#3
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Guru
City: Gig Harbor
Vessel Name: Kinship
Vessel Model: North Pacific 43
Join Date: May 2015
Posts: 9,046
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Quote:
Originally Posted by tbtapper
Interested in hearing what sort of battery bank set up folks are using. My house bank is tired and I’m developing a plan for the replacement.
Tbtapper
87 CT 35 sundeck
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What do you have now?
I have 4, 6v L16 AGM batteries. Each battery is rated at 390AH, so with two of them in series and each set parallel, I have a nominal 780AH bank.
The batteries I used were US Battery: USAGML16. I ordered them out of Metroplex Batteries in Dallas Tx. They had them on sale at the time so were a lot less expensive, only $347 each.
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03-15-2018, 07:58 PM
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#4
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Senior Member
City: Port Orchard, WA
Vessel Name: Isobel K
Vessel Model: 37' Custom Pilothouse
Join Date: Oct 2007
Posts: 426
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from a previous post:
in 2008 I remade my house bank with Fullriver 6v units as shown.
My boat does not have a generator.
Charging is handled by a large frame 200amp alternator with smart regulation, or at the dock by a 75A IOTA charger.
We typically are out 45-60 days during the summer in the PNW.
Anchoring 95% of the time.
The bank is sized to allow up to 5 days at anchor without starting the main.
I don't keep track of the number or exact depth of discharge prior to a recharge, but it is rare that it is less than 75%.
The bank is now 9 years old and as far as I can tell it performs the same as the day it was installed.
In 2008, Fullriver was just arriving in the mainstream, so it was a bit of a gamble, but I had found some fairly re-assuring comments from battery guru's in the know.
YMMV
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03-15-2018, 08:49 PM
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#5
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Guru
City: Fort Myers, FL... Summers in the Great Lakes
Vessel Name: Slow Hand
Vessel Model: Cherubini Independence 45
Join Date: Dec 2010
Posts: 12,834
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8 6v Trojan T105 golf cart batteries (open lead acid). 960AH of capacity, but rarely draw them below 80%. For charging I have a second alternator (220 amp Leece Neville) with a Sterling external 3 stage regulator and a Magnum Energy 130 amp inverter / battery charger. I can go 2 days without recharging depending on microwave use. 4 hours of cruising has the battery back to float charge.
Ted
__________________
Blog: mvslowhand.com
I'm tired of fast moves, I've got a slow groove, on my mind.....
I want to spend some time, Not come and go in a heated rush.....
"Slow Hand" by The Pointer Sisters
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03-15-2018, 08:52 PM
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#6
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Guru
City: Seattle
Vessel Name: AZZURRA
Vessel Model: Ocean Alexander 54
Join Date: Aug 2017
Posts: 4,309
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I have 8 L16 lead acid batteries. My batteries live in the vented engine room so I see no need for AGMs. This gives me 1460 amp/hrs. I never worry about what was left on all night.
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03-15-2018, 09:18 PM
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#7
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Guru
City: Adelaide
Vessel Name: Kokanee
Vessel Model: Cuddles 30 Pilot House Motor Sailer
Join Date: Jul 2012
Posts: 3,218
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I have 4 x 120 AH AGM batteries. It keeps my electrical requirements going for 4+ days without charging.
I went with AGM batteries when I decided to move them to an unvented area, to give me better engine access. I don't miss FLA batteries at all.
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03-15-2018, 09:59 PM
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#8
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Guru
City: Gig Harbor
Vessel Name: Kinship
Vessel Model: North Pacific 43
Join Date: May 2015
Posts: 9,046
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Quote:
Originally Posted by bshanafelt
from a previous post:
in 2008 I remade my house bank with Fullriver 6v units as shown.
My boat does not have a generator.
Charging is handled by a large frame 200amp alternator with smart regulation, or at the dock by a 75A IOTA charger.
We typically are out 45-60 days during the summer in the PNW.
Anchoring 95% of the time.
The bank is sized to allow up to 5 days at anchor without starting the main.
I don't keep track of the number or exact depth of discharge prior to a recharge, but it is rare that it is less than 75%.
The bank is now 9 years old and as far as I can tell it performs the same as the day it was installed.
In 2008, Fullriver was just arriving in the mainstream, so it was a bit of a gamble, but I had found some fairly re-assuring comments from battery guru's in the know.
YMMV
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That is a really nice setup. Have you ever considered adding some solar to extend your time past 5 days?
Also, silly question but why do you list the total AH as 1344 instead of 1350?
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03-15-2018, 10:06 PM
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#9
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Guru
City: Signal Mtn., TN
Vessel Name: Stella Maris
Vessel Model: Defever 44
Join Date: Feb 2012
Posts: 2,742
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Eight USA 305 6-volt AGMs. These are deep-cycle floor sweeper batts, about the same footprint as a GC and shorter than an L16. Each pair is 312 AH, for a total bank of 1,248 AH. Magnum MS 2800 pure sine wave inverter/charger. Modified Delco 100-amp alternators with Balmar 614 external regulators, Centerfielder and Duo-charge. Charles 50-amp Iso-Boost transformer. So far, so good.
Sorry, I don’t have any pix of the final install.
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03-15-2018, 10:23 PM
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#10
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Guru
City: Gig Harbor
Vessel Name: Kinship
Vessel Model: North Pacific 43
Join Date: May 2015
Posts: 9,046
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Angus99, I still think that is a beautiful installation. It provided the inspiration for my own battery bank. Mine is only half the size however.
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03-16-2018, 06:33 AM
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#11
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Guru
Join Date: Oct 2007
Posts: 22,553
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With no refrigeration loads on the battery bank a pair of NAPA *8D works for us.
Truck batts not real deep cycle , but about 1/2 & 1/2 .
A single 8D works fine at anchor for 3-5 days , with enough left to start the 6-71 with ease.
The simplest way to great battery life is to reduce the loads .
FW pump, bilge propane sniffer , range propane valve, AM-FM car radio , 10 Inch TV, and multiple lights are most of our load.
A 1750w inverter is fine for some re heating , we cook with propane.
Anchor light is LED in Perko housing for over 20 meters boat. Still not a bad draw.
One 85W solar helps bring daytime charging , on sunny days.
KISS does work ,
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03-16-2018, 06:45 AM
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#12
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Guru
City: Italy
Vessel Name: Didi Mau
Vessel Model: Currently looking for next boat
Join Date: Jul 2015
Posts: 1,081
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I will probably move to carbon foam batteries this summer. Take a look at firefly oasis. Now I have two 8d AGM, which is not enough. I figure 4 to 6 group 31 firefly will be enough.
Gordon
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03-16-2018, 07:18 AM
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#13
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Guru
City: Annapolis
Vessel Name: Ranger
Vessel Model: 58' Sedan Bridge
Join Date: Aug 2013
Posts: 7,088
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Quote:
Originally Posted by tbtapper
Interested in hearing what sort of battery bank set up folks are using. My house bank is tired and I’m developing a plan for the replacement.
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We have two large dual-purpose banks, and each runs approx half of the house loads and starts one main engine (Cummins 6CTAs)... and there's a parallel switch to augment that if necessary.
One bank is now 4x 6V Lifeline GPL-4CT AGMs (GC2s) in series/parallel for nominal 440-Ah capacity. That bank is connected to an inverter/charger, and the inverter services the house "AC outlet" loads: microwave (short bursts), coffee maker, TV and stereo, etc.
The other bank is 3x 12V Odyssey PC-2150 AGMs (G31s) for nominal 300-Ah capacity.
Both banks also service an AC/DC fridge, in DC mode when the genset isn't running or we're not on shorepower.
The set-up is largely space and geometry constrained. The current Lifeline bank was previously 3x Odysseys... which worked well, but predates the inverter... until I figured out a way to put 4x GC2s in not much more space than the 3x G31s... while still leaving a sliver of space for the separate genset battery.
-Chris
__________________
Chesapeake Bay, USA
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03-16-2018, 07:30 AM
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#14
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Guru
City: Jacksonville
Vessel Name: SONAS
Vessel Model: Grand Alaskan 53
Join Date: May 2014
Posts: 7,235
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Had the yard replace the wet cell house batteries on my 24v set up last fall with 12 8AGC2M AGM 6 volt batteries at a nice $288.00 each!
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03-16-2018, 07:44 AM
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#15
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Member
City: Norfolk
Vessel Name: Tarka
Vessel Model: Lyman-Morse 38 fly
Join Date: Jan 2018
Posts: 16
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Angus99 Im looking to redo mine as well and like you look. I think i can configure it like yours. What kind of tie down are you using.
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03-16-2018, 08:25 AM
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#16
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Veteran Member
City: Hilton Head Island
Vessel Name: Lady Maria
Vessel Model: 1987 CT 35 Sundeck
Join Date: Jul 2017
Posts: 49
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Great info, thanks all. Some very I,pressive setups, maybe a little out of my realm but some good ideas to work with👍 Thanks
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03-16-2018, 08:39 AM
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#17
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Guru
City: Cary, NC
Vessel Name: Skinny Dippin'
Vessel Model: Navigator 4200 Classic
Join Date: Jul 2009
Posts: 5,841
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If you do a quick little search, there are a TON of threads about the subject 'round deez here parts. I am a big fan of 6V golf cart batteries (I have 8) with three Group 27's (12V) to crank the motors. Do yourself a favor and don't just do a 1-for-1 replacement of the batteries. If you have an older boat, get a kick-a$$ crimping tool and shrink to upgrade the wires, switches, and superfluous connections to all things in the battery's world.
__________________
2000 Navigator 4200 Classic
(NOT a trawler)
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03-16-2018, 08:43 AM
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#18
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Guru
City: Maine Coast
Vessel Name: Tortuga
Vessel Model: Nunes Brothers Raised Deck Cruiser
Join Date: Feb 2015
Posts: 889
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I have two grp 29 flooded deep cycle batteries for about 220 amp-hr capacity. All I use electricity for is to run the bilge pumps, lights (all LED), pressure water pump, the Webasto heater (only run in the Spring and Fall) and the refrigeration that I leave on 24/7. I don't have shore power so I rely on my solar array to keep the batteries charged. So far, so good, but it has only been 7 seasons so far.
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03-16-2018, 08:49 AM
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#19
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Guru
City: Victoria TX
Vessel Name: Bijou
Vessel Model: 2008 Island Packet PY/SP
Join Date: Nov 2012
Posts: 5,290
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I have 4 Lifeline 125AH AGM batteries. They are about two years old. They also run the bow thruster so they get a lot of exercise, but are holding up well it appears.
I have a Balmar Smartgauge battery monitoring system that keeps a good eye on the discharge status.
I also have a 8wk generator, and don’t stay out on the hook long yet, but eventually I would like to upgrade to some solar and maybe 6V batteries? to get more “hook time”.
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03-16-2018, 08:08 PM
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#20
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Guru
City: Signal Mtn., TN
Vessel Name: Stella Maris
Vessel Model: Defever 44
Join Date: Feb 2012
Posts: 2,742
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Thanks, Dave and Will O.
WO, I’m using heavy duty ratchet tie downs and D-rings bolted through the platform. Each battery is nested between oak 1 X 1s glued and screwed every four inches. They can’t shift sideways and the straps hood them down with a lot of pressure. I have a wooden top that fits over the bank, but haven’t decided if I’ll use it. I still have some wiring to do in this area, so it’s still pretty messy.
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