Reply
 
Thread Tools Search this Thread Display Modes
 
Old 03-30-2019, 05:34 PM   #41
Guru
 
Aquabelle's Avatar
 
City: sydney
Vessel Name: Aquabelle
Vessel Model: Ocean Alexander Flushdeck
Join Date: Jun 2012
Posts: 924
Quote:
Originally Posted by sunchaser View Post
Why Fireflys? Most of us know the Firefly story but to offset the much higher cost than FLAs what advantages do you see? With some on TF already having them this may be a good time to advise us on - has the real world matched the sales promotion?
I think the advantages have been pretty well canvassed on TF over the last couple of years. The higher per-battery costs are significantly offset by requiring fewer of them. I am attracted by the higher re-charge rate/shorter genset ( & alternator) running times; and by their apparent robustness.

Demand in N America is now so high that getting them in other markets is even harder than it was 20 months ago. Supposed to be new manufacturing plants (in India) coming on line soon.
__________________
Advertisement

Aquabelle is offline   Reply With Quote
Old 03-30-2019, 06:54 PM   #42
Guru
 
Ka_sea_ta's Avatar
 
City: Puget Sound
Join Date: Jun 2016
Posts: 658
Quote:
Originally Posted by Aquabelle View Post
I think the advantages have been pretty well canvassed on TF over the last couple of years. The higher per-battery costs are significantly offset by requiring fewer of them. I am attracted by the higher re-charge rate/shorter genset ( & alternator) running times; and by their apparent robustness.

I think it would be great to have the ability of the battery bank to accept 100%C or even greater... and then discharge down 20%C.... But when I do the math, 500 A/H bank of FFs will cost about $ 2500. AGMs 800 A/H bank same useful capacity devices to will accept 50%C at a cost of about 2k The cost to me is not in the Batteries but what will charge them, 200 amp Alternator, 150 amp inverter charger? These are typical high current charging devices The AGMS will accept their output also. It seems just to take advantage of a higher charge rate of LIfePos or FFs you're going to have to spend $$$ on charge devices that can produce the high current these batteries can absorb. Maybe if weight and space are an issue they make sense...
__________________

Ka_sea_ta is offline   Reply With Quote
Old 03-31-2019, 05:56 AM   #43
Guru
 
Aquabelle's Avatar
 
City: sydney
Vessel Name: Aquabelle
Vessel Model: Ocean Alexander Flushdeck
Join Date: Jun 2012
Posts: 924
I already have those 'high charging' devices in place: 120A + 160A alternators combined via a Balmar CenterFielder with all output going to the House bank; and a 120A Victron inverter/charger. I think I could replace my x8 golf carts with 4 x FF's given their re-charge times & DoD. Remember also that FF's claim x2 the cycles of flooded golf carts....so over the life of a battery bank, that makes them actually cheaper. Others seem to be doing the same calculation, hence the demand.
Aquabelle is offline   Reply With Quote
Old 03-31-2019, 06:18 AM   #44
Guru
 
City: Carefree, Arizona
Vessel Name: sunchaser V
Vessel Model: DeFever 48
Join Date: Apr 2008
Posts: 9,036
AQ
What is the cost of a good golf cart battery in your area?
sunchaser is offline   Reply With Quote
Old 03-31-2019, 06:37 AM   #45
Guru
 
Aquabelle's Avatar
 
City: sydney
Vessel Name: Aquabelle
Vessel Model: Ocean Alexander Flushdeck
Join Date: Jun 2012
Posts: 924
Crown 235Ah golf carts are around $240 each. I expect my House bank to last 7 years, maybe 8 with these.
Aquabelle is offline   Reply With Quote
Old 03-31-2019, 07:03 AM   #46
Guru
 
City: Carefree, Arizona
Vessel Name: sunchaser V
Vessel Model: DeFever 48
Join Date: Apr 2008
Posts: 9,036
Quote:
Originally Posted by Aquabelle View Post
Crown 235Ah golf carts are around $240 each. I expect my House bank to last 7 years, maybe 8 with these.
Yeah, 7-8 years for a decent FLA battery bank seems normal if not abused. Firefly batteries made in India sounds interesting. The Asian market could prove huge. And maybe bring prices down.
sunchaser is offline   Reply With Quote
Old 03-31-2019, 07:06 AM   #47
Senior Member
 
City: Marion, Massachusetts
Vessel Name: Wanderer
Vessel Model: Pilgrim 40
Join Date: Sep 2016
Posts: 427
Compare prices online. I also noticed that the price was cheaper if you bought a “set” for the “golf cart”, that is 4 of them. Also try to find a golf cart maintenance yard in your area. They won’t have a classic retail store, but more like the parts department of an auto dealership type place.
PMF1984 is offline   Reply With Quote
Old 03-31-2019, 10:50 AM   #48
Guru
 
catalinajack's Avatar
 
City: Edgewater, MD
Vessel Name: Catalina Jack
Vessel Model: Defever 44
Join Date: Nov 2011
Posts: 2,009
[QUOTE=CMS;752545]#1 Not all Sam's locations sell the East Penn made products. If it says 208Ah, at the 20 hour rate, it is not the East Penn made GC2. /QUOTE]

And that was the point I was trying to make in an earlier post, that all things are not created equal. A 208 Ah Deka battery is not of the same manufacture as a Deka 230 Ah battery. The Sam's 208 Ah Deka-made battery is not necessarily a bargain when calculating a per/Ah cost. Of course, if you are okay with a lower number of total Ah's, then, no problem. However, with an eight-battery house bank, the difference is 88 Ah, 44 Ah usable which, to me, is a significant difference.

For comparison, a 230 Ah Deka at Pasco Battery today costs $115 ($.50/Ah) as compared to a Sam's 208 Ah for $90 ($.43/Ah). For an eight-battery bank, that amounts to $60 more for the "genuine" Deka batteries. Assuming an average life span of seven years, that amounts to a cost of $8.60/year for that added 44 Ah of usable current. I'll take that any day, every day.
catalinajack is offline   Reply With Quote
Old 03-31-2019, 12:26 PM   #49
Veteran Member
 
City: Rockland, ME
Vessel Name: Leap of Faith
Vessel Model: Mainship 34. Mk III
Join Date: Nov 2015
Posts: 28
Trojan T 105s rule
Lecomte38 is offline   Reply With Quote
Old 04-03-2019, 05:44 AM   #50
Senior Member
 
Mischief Managed's Avatar
 
City: Hampton Beach, NH
Vessel Name: Mischief Managed II
Vessel Model: 1992 Tollycraft 44 CPMY
Join Date: Oct 2018
Posts: 319
Quote:
Originally Posted by Panacea123 View Post
I’ve got Trojan T105RE
Not much mentioned about them on these forums
I called Trajan 4 yrs ago when I installed them, their advice was to go with the “RE” version, some mystery carbon technology, but supposedly happier with the 80% SOG most of us experience. Regular golf cart batteries are usually fully charged at the end of the day. Most boats rarely see this.
The “RE” series stands for renewable energy, designed for use in off the grid systems.
Time will tell but 4 years and no loss of capacity.
Look at their website, the “RE” series has a much longer life span.

Life on the hook 6mnts/yr
1 hr gen charge per day, while I make water
780 watts solar topped off by 2pm most days.
Runs all my goodies incl ice maker and wash machine.

I'm curious, how many Trojan T105REs are in your house bank? I have a similarly-sized boat, room for 1000ish watts of solar, and have similar plans (6 months on the hook) for my boat.
Mischief Managed is offline   Reply With Quote
Old 04-04-2019, 06:37 AM   #51
FF
Guru
 
FF's Avatar
 
Join Date: Oct 2007
Posts: 21,332
The batt tech is slowly improving as millions are spent in research .
But I think for many boats the refrigeration system is the cause of high electric consumption.

For some folks the improvement in eutetic (cold plate) tech might be enough to allow solar to hold the boat systems , with big power from the main or noisemaker only needed every other day for 30 min or so.
FF is offline   Reply With Quote
Old 04-04-2019, 07:21 AM   #52
TF Site Team
 
Larry M's Avatar
 
City: JAX, FL
Vessel Name: Hobo
Vessel Model: Krogen 42-120
Join Date: Nov 2008
Posts: 9,397
FYI: Stopped in Costco on the south-west side of Jacksonville yesterday. The date on the battteries were 1/19 so they’re pretty fresh. Price for the 6 volt GC2: $93.99 plus a core charge of $15 and a battery fee of $1.50, what ever that is.
Attached Thumbnails
484F1ABC-3CD0-4EE6-911B-2871829DEC4E.jpeg  
Larry M is offline   Reply With Quote
Old 04-04-2019, 07:57 AM   #53
Guru
 
City: Z
Vessel Model: Beneteau Swift Trawler 44
Join Date: Mar 2017
Posts: 827
Quote:
Originally Posted by Larry M View Post
FYI: Stopped in Costco on the south-west side of Jacksonville yesterday. The date on the battteries were 1/19 so they’re pretty fresh. Price for the 6 volt GC2: $93.99 plus a core charge of $15 and a battery fee of $1.50, what ever that is.
Batts were $84 at my local Sam's club and only $5 core fee. I had a coupon that saved $5 per battery net IIRC so my OTD price was about $85 plus tax each a bit better than $110.49. If you are buying say 8 batts thats over $200 difference in price. I heard some Sam's clubs charge more for the core fee but that was just rumor.
mystery is offline   Reply With Quote
Old 04-04-2019, 09:55 AM   #54
Guru
 
City: Port Townsend
Vessel Name: The Promise
Vessel Model: Roughwater 35
Join Date: Sep 2012
Posts: 1,563
I used these, but there are other sizes as well. Check the site.

Dyno Battery - Premium Quality Battery Manufacturing - Made in the USA
dhmeissner is offline   Reply With Quote
Old 04-05-2019, 12:41 PM   #55
Member
 
City: South Western Florida
Vessel Model: Grand Banks 49
Join Date: Jul 2018
Posts: 15
Quote:
Originally Posted by Gray Dog View Post
I'm in the process of replacing two 8D flooded lead acid batteries with six GC2 Golf cart batteries. I want to stay with flooded lead acid. The brands I am looking at all have about the same price for 220 amp hour models. In consideration is Crown, Interstate and Duracell.

Does anyone have experience with these brands that might help me make the best choice?

===


I started out with Trojan T-105s but have subsequently switched to T-145s. They cost significantly more but I'm getting much better life and power out of them. Replacement is a PITA and we use the batteries hard, cruising 6 months at a time, mostly anchored out and running on inverter power much of the day.
Wayne.B is offline   Reply With Quote
Old 04-05-2019, 12:46 PM   #56
Newbie
 
City: Seattle
Join Date: Mar 2017
Posts: 1
Wayne I installed 6 Interstate L16 batteries in my old boat and got 15 years out of them! when they finally needed to be replaced in 2016 I went with the same batteries. I am always careful to keep them full with distilled water, never discharge past 50%, and use a good (Hart) smart charger.
Robwill is offline   Reply With Quote
Old 04-05-2019, 12:56 PM   #57
Senior Member
 
Martin J's Avatar
 
City: Mt Crested Butte
Vessel Name: Artemis
Vessel Model: Cheoy Lee 67
Join Date: Feb 2013
Posts: 451
Not much more to say except always gone for the Trojans in the last 3 boats. 14xL16's in the C&L 65, Folowed by 10T105plus in the Cheoy Lee 50. And currently fitting 10 L16's into the new Cheoy Lee 67 I'm refitting.

One thing I do like with Trojan is the depth of the electrolyte over the plates, much more than other manufacturers. Also noted over the years i the lack of outgassing when using there watering systems, ergo less electrolye loss therefore less topping up etc.
Martin J is offline   Reply With Quote
Old 04-05-2019, 01:47 PM   #58
Veteran Member
 
City: Redington Shores
Vessel Name: Andiamo
Vessel Model: Mainship 34 Trawler
Join Date: Apr 2016
Posts: 34
Trojans

I replaced 2 8Ds with 6 Trojans on my Mainship 34.
Love em. I’d buy no other.
daviddraper is offline   Reply With Quote
Old 04-05-2019, 03:16 PM   #59
Member
 
City: The Villages
Join Date: Mar 2018
Posts: 12
Trojan

Quote:
Originally Posted by Gray Dog View Post
I'm in the process of replacing two 8D flooded lead acid batteries with six GC2 Golf cart batteries. I want to stay with flooded lead acid. The brands I am looking at all have about the same price for 220 amp hour models. In consideration is Crown, Interstate and Duracell.

Does anyone have experience with these brands that might help me make the best choice?

Thanks in advance for any information.

Wayne Prichard
1999 Island Gypsy 32
The golf cart battery of choice in The Villages, Florida is Trojan. There are more than 60,000 golf carts in this retirement community and Trojan is the choice of most golf cart owners. In this community, which covers more than 30 square miles and has over 40 golf courses, golf carts are the preferred method of transportation so reliable, long lasting deep cycle batteries are a must. I just installed a 4KW inverter in my boat and chose the Trojan T1275. These are deep cycle batteries not starting batteries.
jkxtreme is offline   Reply With Quote
Old 04-05-2019, 03:46 PM   #60
Guru
 
rgano's Avatar
 
City: Southport north of Panama City
Vessel Name: FROLIC
Vessel Model: Mainship 30 Pilot II since 2015. GB-42 1986-2015. Former Unlimited Tonnage Master
Join Date: Oct 2007
Posts: 2,708
I was also quite happy with four Trojan T145s as a house bank in a 42-foot trawler. They replaced some rather short-lived Sam's Club batts.
__________________

__________________
Rich Gano
FROLIC (2005 MainShip 30 Pilot II)
Panama City area
rgano is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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



» Trawler Port Captains
Port Captains are TF volunteers who can serve as local guides or assist with local arrangements and information. Search below to locate Port Captains near your destination. To learn more about this program read here: TF Port Captain Program





All times are GMT -5. The time now is 11:04 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2021, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012
×