24v to 12v

[Jebby14]

hey all. anybody know of an easy way to get a 24v battery to feed a 12v system? seems like there are converters online but I don't see any locally.

[Monster9903]

He already said it's 12 volt. But for sake of discussion most 24 volt and 36 volt units are either running multiple 12 volt batteries in series or running s special order battery in 24 or 36 volts. If it was a 24 volt battery I wouldn't use it. You can by a DC to dc converter or build your own step down unit but why spend the $$ on these inefficient ideas it's just not worth it

[Naio]

You can get a 24v charger, if it is 24v. I have had a lot of them, in my day, and recommend ebay as a source.

[Nvr2loud]

Iraqvet05 wrote:

Nvr2loud wrote:

Jebby14 wrote:
I was given a deep cycle to try out on the camper. Do not know the size but I know its from a boat (many trolling motors are 24v) so im not sure. ive never heard of a dcdc converter so im not sure what the deal is.

Every trolling motor that I have ever owned has run on a 12 VDC battery, preferably deep cycle.

Connect a meter reading DC voltage on the battery terminals and that will determine the voltage.

Go look at Bass Pro's site or other fishing supply sites and you will find more 24v and 36v motors for bow mount motors than 12s. Lots of guys are switching to 24v's because they are more efficient than 12v motors. My neighbor can troll around the lake all day on two 12vs in series to his 24v motor.

Despite the availability of various voltage trolling motors, my advice still holds true... connect a meter across the terminals to check the voltage of the battery.

[wanderingbob]

Many larger boats will have 24 volt systems ! I have ran boats that ran two twelve volts to get this or even three eight volt batteries . Now you can buy large single cell 2 volt batteries and stack em any way you want for commercial and ferry boats .

[AirForceAngler]

I smell an electrical fire in the future. Be careful.

[Jebby14]

all is well.

[AirForceAngler]

As someone else stated, you most likely have a 12V battery. Yes there are 24 and 36V trolling motors but they use 2 or 3 12V batters to power them.

[BB_TX]

.....

[majorgator]

Iraqvet05 wrote:
I've never heard of a 24V marine battery, but I guess it's possible. The guys that I know that run 24V trolling motors have two 12v batteries in series.

This is correct. While 24V batteries do exist in general, they DO NOT exist for the typical marine and automotive uses. I have seen lengthy discussions over the years about how to charge 24V batteries, where to get them, converters, etc., only to find out that everyone in the conversation doesn't have a clue what they're talking about.

[Jebby14]

its all good. shes a 12v holding charge well with proper voltage. looks like I win. does appear that my trailer is not charging it when plugged in though. ill start another thread for that. thanks guys

[opnspaces]

as 2oldman state, count the fill holes on the top of the battery and multiply by 2.

3 caps = 6 volts
6 caps = 12 volts
12 caps = 24 volts

[christopherglen]

We are running a 36 volt trolling motor at work. The larger the thrust, the more power they consume. In order keep the motors a reasonable size, they run higher voltage and lower current - hence the 36 volt in my case. I have a 3 battery 20 amp charger (total of 20 amps, divided as needed across the batteries) with all isolated outputs. It can charge 3 batteries in series, parallel, or isolated.
There are boxes which will rebalance 24 volt packs, so all you do is center tap them, and go. You can charge and/or discharge the 12 volt, and the box will maintain the 24 volt pack balanced, and at twice the voltage of the 12 volt battery. The battery you are using takes most of the load, the second one is either charged, or discharged to back up the first one at whatever the current limit of the box is, usually 10-20 amps on the 12 volt side.

[Tom_M1]

There is also the question of how to charge the battery? You may need two DC-to-DC converters. A 12 to 24 volt to charge and a 24 to 12 volt to power your coach.

[Iraqvet05]

Nvr2loud wrote:

Jebby14 wrote:
I was given a deep cycle to try out on the camper. Do not know the size but I know its from a boat (many trolling motors are 24v) so im not sure. ive never heard of a dcdc converter so im not sure what the deal is.

Every trolling motor that I have ever owned has run on a 12 VDC battery, preferably deep cycle.

Connect a meter reading DC voltage on the battery terminals and that will determine the voltage.

Go look at Bass Pro's site or other fishing supply sites and you will find more 24v and 36v motors for bow mount motors than 12s. Lots of guys are switching to 24v's because they are more efficient than 12v motors. My neighbor can troll around the lake all day on two 12vs in series to his 24v motor.