Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 01-05-2016, 09:58   #1
Registered User

Join Date: Feb 2010
Location: UK, Middle East, Australia
Boat: Angus Primrose One design 45ft And Duncanson 34 Mk2
Posts: 197
Battery bank size

I am not sure if this has been started before..
But what is the general size of your cruising boats battery bank?
How many AH in total?
__________________

__________________
nauticalnomad is offline   Reply With Quote
Old 01-05-2016, 10:30   #2
Registered User
 
Zanshin's Avatar

Join Date: Feb 2007
Location: Caribbean
Boat: Jeanneau 57
Posts: 1,621
Re: Battery bank size

I've got 880Ah in the primary house bank (actually 440Ah@24V), then a secondary 12V house bank of 150Ah used for anything that isn't 24V or run off the inverter. I've also got a bank of 4 Optima batteries for the bowthruster and a starter battery each for the engine and generator.

I am a liveaboard, and have an electric galley; so I need a bit of spare capacity for the occasional heavy drain required by the galley and watermaker and coffee machine
__________________

__________________
-Zanshin (SV Zanshin)
Zanshin is offline   Reply With Quote
Old 01-05-2016, 10:38   #3
Registered User

Join Date: Feb 2010
Location: UK, Middle East, Australia
Boat: Angus Primrose One design 45ft And Duncanson 34 Mk2
Posts: 197
Re: Battery bank size

Quote:
Originally Posted by Zanshin View Post
I've got 880Ah in the primary house bank (actually 440Ah@24V), then a secondary 12V house bank of 150Ah used for anything that isn't 24V or run off the inverter. I've also got a bank of 4 Optima batteries for the bowthruster and a starter battery each for the engine and generator.

I am a liveaboard, and have an electric galley; so I need a bit of spare capacity for the occasional heavy drain required by the galley and watermaker and coffee machine
WOW.... And heres me with 220 AH and about to increase another 220 AH.. So 440 AH in total.
I dont have any of those luxury items on board but am looking to install a watermaker and a coffee maker.
Ive just always sat in the dark when the power runs out..
__________________
nauticalnomad is offline   Reply With Quote
Old 01-05-2016, 10:40   #4
Senior Cruiser
 
skipmac's Avatar

Cruisers Forum Supporter

Join Date: Oct 2007
Location: 29 49.16 N 82 25.82 W
Boat: Pearson 422
Posts: 12,374
Re: Battery bank size

I have about 660 amp hours plus will be adding a separate starting battery. All 12V system.
__________________
The water is always bluer on the other side of the ocean.
skipmac is offline   Reply With Quote
Old 01-05-2016, 11:03   #5
Registered User
 
Fog Bank's Avatar

Join Date: Feb 2014
Location: San Francisco
Boat: Cal 2-27
Posts: 240
Re: Battery bank size

We have a total of 660 AH, divided between two banks. 440 AH on the propulsion side, as we have an electric drive, and 220 AH on the household side.
__________________
Fog Bank is offline   Reply With Quote
Old 01-05-2016, 11:26   #6
Registered User
 
leftbrainstuff's Avatar

Join Date: May 2011
Location: San Francisco and Australia
Boat: Liberty 458
Posts: 1,978
Re: Battery bank size

Quote:
Originally Posted by nauticalnomad View Post
I am not sure if this has been started before..
But what is the general size of your cruising boats battery bank?
How many AH in total?
675 Ahr from 6 x Trojan T105s. Our Trojans are 9 years old and using more water now. We'll probably replace them with carbon foam or similar next year.

We have two optima blues for starting and windlass. We are midway through a helm and full instrumentation upgrade. The helm has its own battery to run vhf, ais, nav and instrumentation.

We have 280W of solar and a wind genny. We'll be upping our solar to 700W to eliminate the need to run the genny daily.

We'll also be heating hot water from solar with the excess.

We're more than happy with 675Ahr (30% usable). We run all the mod conns plus a startup business and I work from home often.

We ditched most, but not all 110V AC loads. We hardly ever use our inverter now.

If we still used lots of 110V AC appliances we would need a lot more battery capacity. Those AC to DC and DC to DC losses are significant.

Sent from my SM-N900T using Cruisers Sailing Forum mobile app
__________________
leftbrainstuff is offline   Reply With Quote
Old 01-05-2016, 11:36   #7
Registered User

Join Date: Feb 2006
Location: nyc/chesapeake
Boat: gozzard 44
Posts: 273
Re: Battery bank size

I have a bank of 1200 AH comprised of forklift lead-acid batteries.
Remarkably, they're going on 14 years now.
__________________
ronbo1 is offline   Reply With Quote
Old 01-05-2016, 13:49   #8
Senior Cruiser

Cruisers Forum Supporter

Join Date: Aug 2009
Location: between the devil and the deep blue sea
Boat: a sailing boat
Posts: 17,314
Re: Battery bank size

Why do you ask?

110 Ah.

b.
__________________
barnakiel is offline   Reply With Quote
Old 01-05-2016, 14:01   #9
Registered User

Join Date: Feb 2010
Location: UK, Middle East, Australia
Boat: Angus Primrose One design 45ft And Duncanson 34 Mk2
Posts: 197
Re: Battery bank size

Quote:
Originally Posted by barnakiel View Post
Why do you ask?

110 Ah.

b.

I am adding to my battery bank and was curious as to what other AH the other people are carrying.

I have a 45 ft boat and at moment have 1 x starter battery along with 2 x leisure batteries at 110AH each. I am looking to add another or another 2 batteries to it and i had the option of a single 220 AH big battery or 2 smaller 110AH batteries. The 220AH battery is not as big in physical size as the 2 x 110AH batteries.
__________________
nauticalnomad is offline   Reply With Quote
Old 01-05-2016, 14:08   #10
Don't ask if you can't handle it
 
sailorboy1's Avatar

Cruisers Forum Supporter

Join Date: Jul 2007
Location: On the boat somewhere
Boat: Hunter 410
Posts: 12,311
Re: Battery bank size

I have 2 - 240 AH house banks that I always run together as a 480 AH bank and one start battery. The house can supply the start circuit but the start can not feed into the house bank.

I keep thinking I need a bigger house bank, but since it is very rare to be below 80% I'm just going to wait till it is proved to my mind that I really have a need for more.
__________________
jobless, houseless, clueless, living on a boat and cruising around somewhere
sailorboy1 is offline   Reply With Quote
Old 01-05-2016, 16:01   #11
Senior Cruiser
 
Sailmonkey's Avatar

Cruisers Forum Supporter

Join Date: Sep 2009
Location: Houston
Boat: '76 Allied Seawind II, 32'
Posts: 5,773
Re: Battery bank size

We've got 440 ah in the house bank and a group 24 start battery.
32' boat with 200 watts solar and 200 watts wind.

All led cabin lights, watermaker and refrigerator are the big drains.


Sent from my iPhone using Cruisers Sailing Forum
__________________
Sailmonkey is online now   Reply With Quote
Old 02-05-2016, 08:13   #12
Senior Cruiser

Cruisers Forum Supporter

Join Date: Aug 2009
Location: between the devil and the deep blue sea
Boat: a sailing boat
Posts: 17,314
Re: Battery bank size

Quote:
Originally Posted by nauticalnomad View Post
I am adding to my battery bank and was curious as to what other AH the other people are carrying.

I have a 45 ft boat and at moment have 1 x starter battery along with 2 x leisure batteries at 110AH each. I am looking to add another or another 2 batteries to it and i had the option of a single 220 AH big battery or 2 smaller 110AH batteries. The 220AH battery is not as big in physical size as the 2 x 110AH batteries.
We used to have two house banks but upon n-th incarnation I decided to convert to a single, bigger bank instead. Over time, by going LED and kicking out some useless electrical equipment from the boat I was able to reduce our originally 240Ah bank to the present 110Ah.

I am also sailing and maintaining a biggi-sh 72'er now. This one also has a single house bank (of 660Ah / 24V).

I remember from (Calder's?) book a fascinating discussion of 2 house banks vs. 1 bank. Frankly, I never really understood that argument as I am always sailing simple sailing boats. I can imagine that a specific trawler or some other type of boat calls for two banks rather than one.

In practical terms, onboard a small sailing boat, you may consider the following tricks:

- make the starter battery huge,

(because should your house bank go pop, you can still run the VHF or a LED anchor light, etc)

- make the house bank (assuming 12 Volt systems) of two smaller 12V batteries rather than one big (use 50Ah + 50Ah to make a single 100 bank rather than use a single 100Ah battery)

(reasoning same as above - should one of the twin house batteries kick the bucket, you remove it and keep on rolling, with half the capacity)

To sum this up, my take is:
- one oversize engine battery,
- one house bank (made out of 2, or more, batteries)

e.g. here (boat 26', LED, no fridges, no air, no micro, no plasma,)
- starter 90Ah, (engine 12hp),
- house 110Ah (= two batteries 55Ah each).

Make sure you can start the engine of any bank (a simple jump wire is enough).

An automatic overflow charging is nice to have on the alternator side (we have a simple relay system).

Our daily Ah consumption is 10 to 25Ah (10 to 25% of our house bank cap), depending on whether we are offshore or anchored (more consumption anchored).

We use a digital monitor to look up the house bank and the charging status (Bogart Engineering) - recommended.

We use 150W solars and a PWM to charge off the grid and a shore side 25A charger at the dock. We are in a super solar hours zone (Canary Islands or Caribbean). I am going to upgrade to MPPT and add 50% of solar capacity, just in case.

We charge 100% daily as a rule, with single only days when there was not enough sun on the passage.

Cut/mix/paste and set up your perfect house bank! ;-)

Cheers,
b.
__________________
barnakiel is offline   Reply With Quote
Old 02-05-2016, 10:13   #13
Registered User

Join Date: Jan 2015
Location: Victoria BC
Boat: 1980 Hunter 36
Posts: 675
Re: Battery bank size

I had 70AH for the last couple years and upgraded to 220AH last week

70AH was ok and lasted a couple of evenings, anything more than 3 days though and I had to run the engine so the extra power is nice!

LEDs are amazing, btw
__________________

__________________
S/V Gudgeon
www.gudgeonblog.ca
alctel is offline   Reply With Quote
Reply

Tags
battery, size

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Single bank Battery Monitor with Automatic Charging Relay to starting bank as a load? Zach Marine Electronics 5 23-04-2016 16:26
House battery bank size bottleinamessage Electrical: Batteries, Generators & Solar 16 05-04-2007 21:00



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 06:05.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.