Reply
 
Thread Tools Search this Thread
 
Old 08 April 2017, 23:09   #1
Member
 
Country: UK - England
Town: STOKE
Boat name: Humma
Make: Humber Destoyer 5.5
Length: 5m +
Engine: Out b 75 hp Marriner
MMSI: 235068231
Join Date: Sep 2005
Posts: 260
RIBase
Smaller but powerful Battery

Would like more room under helm . I have a medium size 12volt car battery fixed in place works well but it's into 3 year and want to change it
What type of battery would you recommend it powers a 75 hp Marrinier engine on a 5.5 Humber destroyer it also runs a chart plotter and Vhf radio
I believe gel cell are smaller but don't know much about apart from a little more expensive
Thanks Stuart
__________________

__________________
stul is offline   Reply With Quote
Old 09 April 2017, 07:20   #2
Member
 
Pikey Dave's Avatar
 
Country: UK - England
Town: South Yorks
Boat name: Black Pig
Make: Ribcraft
Length: 5m +
Engine: DF140a
MMSI: 235111389
Join Date: Feb 2008
Posts: 11,091
RIBase
Quote:
Originally Posted by stul View Post
Would like more room under helm . I have a medium size 12volt car battery fixed in place works well but it's into 3 year and want to change it

What type of battery would you recommend it powers a 75 hp Marrinier engine on a 5.5 Humber destroyer it also runs a chart plotter and Vhf radio

I believe gel cell are smaller but don't know much about apart from a little more expensive

Thanks Stuart


Any lead acid tech battery will be a similar weight/ah. Gel & AGM are slightly lighter than a traditional wet cell battery but only marginally. If you really want to go light, you're looking at lithium, but these are currently very expensive & have special charging requirements. Also lithium & water are a dodgy mix.
__________________

__________________
Rule#2: Never argue with an idiot. He'll drag you down to his level & then beat you with experience.
Rule#3: Tha' can't educate pork.
Rule#4:https://www.youtube.com/watch?v=unkIVvjZc9Y
Pikey Dave is offline   Reply With Quote
Old 09 April 2017, 12:43   #3
Member
 
Country: UK - England
Town: STOKE
Boat name: Humma
Make: Humber Destoyer 5.5
Length: 5m +
Engine: Out b 75 hp Marriner
MMSI: 235068231
Join Date: Sep 2005
Posts: 260
RIBase
Thanks For help,but I am after more space smaller rather than lighter if possible .
Money as always is a factor
Stuart
__________________
Stuart
stul is offline   Reply With Quote
Old 09 April 2017, 12:48   #4
Member
 
Country: UK - England
Town: STOKE
Boat name: Humma
Make: Humber Destoyer 5.5
Length: 5m +
Engine: Out b 75 hp Marriner
MMSI: 235068231
Join Date: Sep 2005
Posts: 260
RIBase
Interesting Facts

FAQ about replacing lead acid with lithium battery
__________________
Stuart
stul is offline   Reply With Quote
Old 09 April 2017, 17:33   #5
Member
 
Country: Other
Length: no boat
Join Date: Feb 2016
Posts: 282
Google thermal runaway before installing lithium batteries, particularly in the physically demanding environment of a rib.

Boeing have had the odd hiccup.
__________________
Iron Dials is offline   Reply With Quote
Old 09 April 2017, 17:53   #6
Member
 
Pikey Dave's Avatar
 
Country: UK - England
Town: South Yorks
Boat name: Black Pig
Make: Ribcraft
Length: 5m +
Engine: DF140a
MMSI: 235111389
Join Date: Feb 2008
Posts: 11,091
RIBase
Quote:
Originally Posted by Iron Dials View Post
Google thermal runaway before installing lithium batteries, particularly in the physically demanding environment of a rib.

Boeing have had the odd hiccup.


And Samsung
__________________
Rule#2: Never argue with an idiot. He'll drag you down to his level & then beat you with experience.
Rule#3: Tha' can't educate pork.
Rule#4:https://www.youtube.com/watch?v=unkIVvjZc9Y
Pikey Dave is offline   Reply With Quote
Old 09 April 2017, 20:15   #7
Member
 
Country: UK - Wales
Town: Cardiff
Length: no boat
Join Date: Aug 2014
Posts: 1,932
How big is current battery?

OPTIMA® RedTop S 3,7 - Optima Batteries UK
__________________
HDAV is offline   Reply With Quote
Old 10 April 2017, 15:02   #8
Member
 
Country: UK - England
Town: Southampton
Boat name: SMH Rib / War Shot
Make: Ribtec / Scorpion
Length: 4m +
Engine: 100hp Yam/150hp opt
Join Date: Sep 2003
Posts: 2,060
RIBase
Odyssey batteries are very small and light for their output current. But as with everything a small battery won't have as good a capacity.
These are really for racing cars and aeroplanes:

https://www.merlinmotorsport.co.uk/s...cing-batteries
__________________
Searider is offline   Reply With Quote
Old 11 April 2017, 02:42   #9
Member
 
Country: Australia
Town: Dalmeny
Make: zodiac
Length: 5m +
Engine: outboard
Join Date: May 2015
Posts: 1,182
Ive always had dual battery and charger set-ups but recently went over to a single battery and just carry a spare jump starter instead Batteries Direct I was recommended to go this way from an outboard mechanic who makes nothing from the jumper system and heaps on setting up dual systems for those who insist on them.

This has proven to be extremely helpful as Ive already used it at sea to jump start another boat and twice at the boat ramp on other peoples 4x4's who have left their lights on all day flattening their battery.

Have a look the NoCo Genius Lithium Battery Jump Starter Pack as this type is carried by many of the marine rescue groups over here, some can jump large trucks and tractors.

I f you want to go with the expense, maintenance and weight of dual systems then go ahead. Ive also pulled the very expensive dual C-tec charging system and large extra battery from my 4x4.

By the way when I fish right through the night I tend to use rechargeable led lights and have most of my boat electronics turned off.
__________________
jonp is offline   Reply With Quote
Old 11 April 2017, 02:52   #10
Member
 
Country: Australia
Town: Dalmeny
Make: zodiac
Length: 5m +
Engine: outboard
Join Date: May 2015
Posts: 1,182
Ive always had dual battery and charger set-ups but recently went over to a single battery and just carry a spare jump starter instead Batteries Direct I was recommended to go this way from an outboard mechanic who makes nothing from the jumper system and heaps on setting up dual systems for those who insist on them.

This has proven to be extremely helpful as Ive already used it at sea to jump start another boat and twice at the boat ramp on other peoples 4x4's who have left their lights on all day flattening their battery.

Have a look the NoCo Genius Lithium Battery Jump Starter Pack as this type is carried by many of the marine rescue groups over here, some can jump large trucks and tractors.

I f you want to go with the expense, maintenance and weight of dual systems then go ahead. Ive also pulled the very expensive dual C-tec charging system and large extra battery from my 4x4.

By the way when I fish right through the night I tend to use rechargeable led lights and have most of my boat electronics turned off. In 40 years of owning boats Ive yet to have a flat battery or break down, not bad considering Im spending 250 engine hours per year on my own boat and around the same on other boats both recreational and commercial.

Ive also been a volunteer member of the marine rescue and found flat batteries are not that common here, maybe the cold your side of the pond might make some difference. Keeping a battery fully charged and well maintained is also much easier on my boat kept at home and though I do own a 80 watt solar system its never been used since buying it 5 years ago.
__________________

__________________
jonp is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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




All times are GMT. The time now is 06:13.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2022, vBulletin Solutions, Inc.