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Default Ok Electron heads...big question!

On Tuesday, February 11, 2014 6:32:25 PM UTC-6, Gunner Asch wrote:
I scored (2) deep cycle batteries, pretty good sized ones...but..they

are 8 volt batteries.



If I hook them in series..I get 16.75 volts when charged with a decent

"deep cycle/gell cell" charger



They do indeed hold a charge for a good long time. I charged them 1.5

months ago..and tested them Sunday..and they still had 16.25 volts on

them.



Is 16.5 volts "too high" for most 12vt dc devices like Marine radios,

fish finders, GPS devices, CB radios, am/fm/cd players and the like?



I had planned on putting them in one of the sailboats, there is enough

weight there for some decent fore end weight distribution. Probably 75

lbs or so..maybe 90 lbs.



If the voltage is too high..what cheap and easy method is there to

drop the voltage down to 13.5/12vts to run my various electronic

devices? Besides a big as resistor....?



I will primarily be using them for lighting..most of the boat(s) are

wired for 12vt incandescent bulbs, but will be changing them if

possible, to LED bulbs/lights (port/starboard/mast head/stern/cabin

etc), but will indeed need the batteries to run my fish finders, GPS

system and so on.



I also have (6) solar panels..which put out 6+ vlts each...and had

planned on putting a pair of them on the stern rail of the

boats..giving me 12 volts to the ($12.95) MPPT charger/solar

controller. I figure Id have to use (3) of them to get me to 18+

volts in order to charge that pair of 16vt batteries..and thats way

too much real estate taken up..so will be using them around the

homestead on an array.



Ive not found dick on the net about 8volt batteries..but they are

plainly marked as such. I figure they may ..may have been intended

for a 24 volt system ..and there should be three in series.



Any insight, information would be greatly appreciated.



Thanks!



Gunner



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Measuring voltage is useless unless there is a load applied.
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