Your favorite house battery?

[TeddyDiver]

Originally Posted by StuM

Don't use Wikipedia as an authoritative source on anything

Well it's quite close to the most thrusted and cited source of everything nowadays. And if anyone finds something suspicious they are free to inform Wikipedia about it and it will be revisited..

[Celestialsailor]

Originally Posted by zeehag

i use 6v golf cart batteries--here i use lth
in usa i used trojan.
lth are found throughout mexico readily.

Have you found the LTH's to be good batteries?

[StuM]

Originally Posted by TeddyDiver

Well it's quite close to the most thrusted and cited source of everything nowadays. And if anyone finds something suspicious they are free to inform Wikipedia about it and it will be revisited..

[StuM]

Originally Posted by TeddyDiver

https://en.m.wikipedia.org/wiki/Battery_(electricity) Don't mix artillery into this

Wikipedia does:

The usage of "battery" to describe a group of electrical devices dates to Benjamin Franklin, who in 1748 described multiple Leyden jars by analogy to a battery of cannon[6] (Benjamin Franklin borrowed the term "battery" from the military, which refers to weapons functioning together[7]).




Added: Wikipedia strikes again Not Leyden Jars. And no statement of where he "borrowed" the term from or that he had a battery of cannon in mind.

"Upon this We made what we call’d an Electrical Battery, consisting of eleven Panes of large Sash Glass, arm’d with thin leaden Plates, pasted on each Side, placed vertically, and supported at two Inches Distance on Silk Cords; with Hooks of thick Leaden Wire one from each Side standing upright, distant from each other; and convenient Communications of Wire and Chain from the giving Side of one Pane to the receiving Side of the other; that so the whole might be charg’d together, and with the same Labour as one single Pane; and another Contrivance to bring the giving Sides, after charging in Contact with one long Wire, and the Receiver with another; which two long Wires would give the Force of all the Plates of Glass at once thro’ the Body of any Animal forming the Circle with them. "

[SV Bacchus]

Originally Posted by StuM

I'm with StuM on this one. Never cite Wiki as a source; it can change its definitions day to day!!

Wiki might be often used but is not the most trusted or accurate..

[DumnMad]

Yeah, but do you trust it less than the news media or online marketing or CF posts (Mainsail excepted)??

[conachair]

g

Originally Posted by SV Bacchus

I'm with StuM on this one. Never cite Wiki as a source; it can change its definitions day to day!!

Wiki might be often used but is not the most trusted or accurate..

So what is then?

Brittanica isn't any better.

https://www.cnet.com/uk/news/study-w...as-britannica/

If anything it just highlights the western myth of "objective truth"

And trojan t105s are the best

[TeddyDiver]

Originally Posted by StuM

Wikipedia does:

The usage of "battery" to describe a group of electrical devices dates to Benjamin Franklin, who in 1748 described multiple Leyden jars by analogy to a battery of cannon[6] (Benjamin Franklin borrowed the term "battery" from the military, which refers to weapons functioning together[7]).




Added: Wikipedia strikes again Not Leyden Jars. And no statement of where he "borrowed" the term from or that he had a battery of cannon in mind.

"Upon this We made what we call’d an Electrical Battery, consisting of eleven Panes of large Sash Glass, arm’d with thin leaden Plates, pasted on each Side, placed vertically, and supported at two Inches Distance on Silk Cords; with Hooks of thick Leaden Wire one from each Side standing upright, distant from each other; and convenient Communications of Wire and Chain from the giving Side of one Pane to the receiving Side of the other; that so the whole might be charg’d together, and with the same Labour as one single Pane; and another Contrivance to bring the giving Sides, after charging in Contact with one long Wire, and the Receiver with another; which two long Wires would give the Force of all the Plates of Glass at once thro’ the Body of any Animal forming the Circle with them. "

Leyden jars were capacitors, and as capacitors do discharge at once no wonder he called it a battery.
As most know there's a bit of difference between battery and capasitor.

[moseriw]

Information for newbies:

Serial and Parallel Battery Configurations and Information

Homing in:
serial:
a cell is always 2V a 12V battery consists of 6 cells
the cells are serialized if one cell has 50Ah the battery has 50Ah

if u use 6 x 2V seperate units and serialize them you always know if one unit is faulty as the output drops. i.e. 6x2V one is faulty = 10V output.
well it is not as simple but you have a chance to replace one cell-unit without any damage to the other cells.

Minus: EXPENSIVE
Plus: Batteries should last fm 12-16 years and more

parallel:
common 12V Batteries in Banks like:
4x12Vx225Ah = 900Ah nominal

Main Problem:
they will always have a different voltage.
if connected they always charge/discharge each other
solution: cyrix-ct on the charging side (partly)
battery combiners(some sort of schottky-diodes) on the load
A system should be implemented to recharge at 12,5V up to 13,8V to
minimize charging intervals.

Minus:
to know if a battery is faulty u hve to disconnect it from the bank to check it
Plus: cheap

Problem for serial and parallel
say nominal is 675Ah u have only about 20% u can actually use from 13,8 down to 12,5V that is 135Ah at max. expect 120Ah.

Thank you all for corrections and comments.
Think this points to the basics and can help a lot of us understanding the problem

[ontherocks83]

Originally Posted by moseriw

Problem for serial and parallel
say nominal is 675Ah u have only about 20% u can actually use from 13,8 down to 12,5V that is 135Ah at max. expect 120Ah.

Not sure what you mean by this one. Yes 12.5v is only 20% DOD but you can safely bring them down to 12.1 or 12.2 for a 50% DOD and get 337ah.

Is there a reason you are saying batteries connected in series/parallel shouldn't be brought below 12.5

[moseriw]

yes I know about the 12,1V statement but I have heard 12,5V to be on the save side too. Unfortionatly do not know where

[Sav]

Drawing down on a battery too far can damage it... Old variety lead acid's can only draw down a little, AGM's more, and Lithiums the most... I believe Lithium battery's can draw down as much as 50% without causing damage to the cells.
The main problem with a damaged cell in a battery, or battery in a bank is that all other batteries in the bank will only recharge to the level of the damaged one.
Batteries are like children, you gotta look after them.

[newhaul]

Originally Posted by Sav

Drawing down on a battery too far can damage it... Old variety lead acid's can only draw down a little, AGM's more, and Lithiums the most... I believe Lithium battery's can draw down as much as 50% without causing damage to the cells.
The main problem with a damaged cell in a battery, or battery in a bank is that all other batteries in the bank will only recharge to the level of the damaged one.
Batteries are like children, you gotta look after them.

Sorry but I have to dispell several untruths here.
FLA and AGM batteries are just fine with a 50% dod with an occasional dod further than that
Lifepo4 batteries are fine with a regular dod of 80% ie 80% of charge used. With no negative effects.

[hellosailor]

While the topic is wandering, let me throw in that some time ago I came across a reference on CALB's web site, indicating no cells over 100A capacity should be used for marine (boat) installations, as their cells were not robust enough to be used in the constantly moving marine environment. One more reason that series-parallel configurations sometimes simply must be used and accommodated. Along with "Honey, did you leave the fork lift in the quarterberth again? I need to move these batteries and I can't find it."