12-24 Volt

[Don S]

Re: 12-24 Volt

The best and most realistic option is to dedicate two equivalent batteries to the 24v Trolling circuit, and a separate Start/House Circuit with a Combined or Separate House and Start Batteries. 3 or 4 batteries will be needed.

I will never argue with that statement..

 

[bruceb58]

Re: 12-24 Volt

Yep, cell reversal is definitely an issue. That is why the load on the battery supplying 12V needs to be low, don't discharge the batteries completely(never should do that anyway) and the batteries swapped occasionally.

 

[bruceb58]

Re: 12-24 Volt

That would be great, if you can find one. My head hurts.

This is a simple diagragm I drew up but it shows kinda how the grounds get isolated:

 

[jjacobs007]

Re: 12-24 Volt

FREE MIGRAINE RELIEF! OH YA,were your gonna need it here.

Im still looking at my battery switch in confusion!

 

[Scott Danforth]

Re: 12-24 Volt

Don,

here is somthing I have used in the past for systems with both 12 and 24 volt battery banks. it has 10 amp output capacity. I used it on a project that used a 12 volt engine and 24 volt accessories.

12010E00 Battery Equalizer

Here is a cheap version I found, not sure on output.

12-24 Volt DC 10 amp Charging Transformer

However note, even their schematic has a flaw.

These are simple DC/DC converter with a 24 VDC output for charging the 24VDC side. It does require the 3-4 batteries.

 

[Don S]

Re: 12-24 Volt

I understand what it takes now, and see why it won't work for 99% of the people that ask for a 12/24 system and have no clue about electricity.

The biggest problem about those wanting the 12/24 system, is they typically don't have a charging system big enough to handle 2 - 12V batteries, much less 3 to 4 batteries and using a 24 Volt trolling motor. Most have 75-125hp outboards with about a 15A max charging capacity. Like trying to fill up a swimming pool with a coffee cup.

Best bet for those folks is to just use a 12 volt system of their choice, and then put in a separate 24V system for the trolling motor and charge the batteries at home with a 24 volt charger of their choice.

 

[Todd4]

Re: 12-24 Volt

Minn Kota's AC and DC chargers both have isolation circuits so they will charge 12V and 24V battery combinations without disconnecting the 24V wiring. Granted the DC charger will not charge all the batteries any time soon because of the limited output of your alternator, but every little bit helps. I have both and so far they seem to work well for me.

Todd