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Trolling motor wiring with crimp connectors

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Trolling motor wiring with crimp connectors

Old 05-31-2019, 06:31 AM
  #1  
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Default Trolling motor wiring with crimp connectors

Hello, I am new to this forum and was hoping to get advice if this is a good move or not?

I use the connectors (male and female ends) to swap my batteries from being in series to parallel to go between my 24V system and charging. (I only have one charger with one bank). I do this instead of unscrewing my nuts and swapping the whole wire back and forth, which gets real old real fast. I assumed this method would be fine but I recently had to change my batteries because my old ones died. This happened right after I changed to this method. The batteries were old anyway so I didn't think too much of it but I thought it was curious they stopped holding a charge right after I made the switch.

Has anyone experienced something like this before? Or does use the crimp connectors and is fine?

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Old 05-31-2019, 06:43 AM
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I know it will cost you more but I think once you switch to a bank charger that all you do is plug in you'll find that not only is your life easier but your batteries last longer and charge quicker. Being plugged in at all times on the charger is huge for battery longevity. I'd also worry about any bullet/crimp connectors groudning out somewhere and causing a fire. It will make that bank charger look cheap. Anyway, I still don't really understand why you need to disconnect batteries at all to use a one bank charger. You could just use clip on battery leads from your charger and clip them to the terminals on each battery and charge it separately.
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Old 05-31-2019, 06:43 AM
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A diagram would help so we aren't making assumptions on exactly what you're doing.

Crimp connectors aren't bad, so long as they are the appropriate size for the connection and installed properly. A poor crimp can certainly cause issues with both the load or the charging.
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Old 05-31-2019, 06:46 AM
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Putting a bad battery in parallel with a good one will yield 2 bad batteries.

Instead f plugs I suggest you use switches so you can run 1, 2, both to the engine. Technically you never want to troll off you engine battery. That's an invitation to a paddle party but if limited use you may get away with it. Sounds like you did for a while.

You really want a 3rd battery where batt 2 and 3 are trollers but back up your main. Mark switches carefully.

if #2 battery is shared with #3 to get 24 volts it's a separate switch group where they are either series or parallel but never 24 back to the engine. Never leave them in parallel unless in use because one will drag the other down but in that configuration a 3 bank charger at home will charge them all. In the OFF position.
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Old 05-31-2019, 06:53 AM
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Spend the 90-100 bucks on a dual
bank charger and be done with it. All this macguyver rigging shit to save a few bucks why people complain about broken boats.
davepjr71 and bilbndr like this.
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Old 05-31-2019, 07:07 AM
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Yes I thought of this. It seems like it would take a long time to charge both though. Do you think its bad to leave the one uncharged for several hours waiting for the other to be charged?
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Old 05-31-2019, 07:44 AM
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It would take about the same time to charge both whether you parallel them and charge them at the same time, or you charge each one separately.

The real question though... is ARE you fully charging them?? A battery takes the bulk of it's charge in the first few hours, but takes many more hours to complete the charge process. If you end it before it's completely charged, you're letting the battery sit in a slightly-discharged state, which is VERY BAD for a battery. Probably just as bad as letting one discharged battery sit around while you charge the other.
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Old 05-31-2019, 08:04 AM
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Originally Posted by Jim311 View Post
I know it will cost you more but I think once you switch to a bank charger that all you do is plug in you'll find that not only is your life easier but your batteries last longer and charge quicker. Being plugged in at all times on the charger is huge for battery longevity. I'd also worry about any bullet/crimp connectors groudning out somewhere and causing a fire. It will make that bank charger look cheap. Anyway, I still don't really understand why you need to disconnect batteries at all to use a one bank charger. You could just use clip on battery leads from your charger and clip them to the terminals on each battery and charge it separately.
My new ProMariner 2 bank charger is hot all the time , even when charged and floating . Is this pretty normal . Scares me after the post about a charger catching fire
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Old 05-31-2019, 08:23 AM
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Originally Posted by normsworld View Post
My new ProMariner 2 bank charger is hot all the time , even when charged and floating . Is this pretty normal . Scares me after the post about a charger catching fire
I'll have to check mine the next time I plug it in but this is very possible.
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Old 05-31-2019, 08:53 AM
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Originally Posted by normsworld View Post
My new ProMariner 2 bank charger is hot all the time , even when charged and floating . Is this pretty normal . Scares me after the post about a charger catching fire

It's still charging at low amperage even when floating I believe so probably pretty normal unless its VERY hot.
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Old 05-31-2019, 12:07 PM
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For trolling applications I'm going with a smaller set of three lithium batteries and an alternator so when the engine is running it recharges the trolling battery whether in use or not.

When I park the boat on shore power or generator I'll have a 3 bank charger to charge both engine start batteries and the third sending 12 volts to the alternator where it will top off the lithiums.
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Old 05-31-2019, 12:10 PM
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Originally Posted by normsworld View Post
My new ProMariner 2 bank charger is hot all the time , even when charged and floating . Is this pretty normal . Scares me after the post about a charger catching fire
Contact them. No sense worrying about it. Is it well ventalated? That's the first question they are going to ask. It should be warm but hot maybe has an issue. You dont want to overcharge the batteries.
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