Notices
Marine Electronics Forum

Battery Charging

Old 07-14-2014, 09:16 AM
  #1  
Junior Member
Thread Starter
 
Join Date: Jul 2014
Location: Pensacola Fl
Posts: 23
Likes: 0
Received 0 Likes on 0 Posts
Default Battery Charging

OK. I'm back with more questions than answers. I don't think I explained it right the first time. I have two EVERSTART group 29 12V Deep cycle marine batteries hooked up to my Riptide ST55, trolling motor in parallel. This connection is totally separate from my engine starting battery. I know I can use one bank of a two bank charger to charge them both by connecting the positive lead to one battery and the negative lead to the other battery. What I would like to know is if I can connect bank one leads from the charger to battery one and bank two leads from the charger to battery two while they are still connected in parallel? Hope this explains it better. ;?
Old 07-14-2014, 09:43 AM
  #2  
Senior Member
 
Join Date: Oct 2009
Location: Idaho, Cabo San Lucas
Posts: 686
Likes: 0
Received 5 Likes on 1 Post
Default

Use just one side of the charger. Using the two connected together without a common charge controller to
load share, it may cause them to oscillate as one tries override the other.
We always had to adjust a string of smart charging rectifiers to come on line one at a time as the load increased and turn off as it decreased. They would fight each other for control if set wrong.
Old 07-14-2014, 10:38 AM
  #3  
Senior MemberCaptains Club Member
 
Join Date: Jan 2005
Location:
Posts: 4,300
Received 309 Likes on 261 Posts
Default

Many marine chargers can be connected in series or parallel, for example like this link below and specifications on a guest/Marinco dual bank marine charger

Charger 10A (5/5), 12/24V 2 Bank 120V Input Marinco On-Board Battery 28210
ChargePro™ onboard chargers have the same housing and mounting dimensions as our traditional Charge Pro Guest chargers with a number of performance enhancements.
  • Charge flooded, AGM or Gel batteries
  • Microprocessor controlled for accurate charging
  • Universal input 120/230V input for go-anywhere freedom
  • Intuitive operation
  • Sense-Send™ technology senses the power needs of each battery and sends correct charge
  • Isolated outputs
  • Outputs can be put in series or parallel for higher voltage or current
  • Completely sealed, epoxy filled
  • IP68 waterproof
  • Designed for harsh marine and industrial environments – moisture, salt, shock and vibration tested
  • Non corroding housing for ultimate reliability
  • Meet global industry standards including UL, CE, CSA, ABYC, California efficiency regulations (CEC)
  • Footprint same as former Charge Pro Guest Chargers
  • ConnectCharge Plug for easy assembly to inlet (Item #150CCI) with no wiring


http://www.progressivedyn.com/marine...rs_pd2100.html
Old 07-15-2014, 08:37 AM
  #4  
Junior Member
Thread Starter
 
Join Date: Jul 2014
Location: Pensacola Fl
Posts: 23
Likes: 0
Received 0 Likes on 0 Posts
Default Battery Charging in parallel

Originally Posted by jetboat69 View Post
Use just one side of the charger. Using the two connected together without a common charge controller to
load share, it may cause them to oscillate as one tries override the other.
We always had to adjust a string of smart charging rectifiers to come on line one at a time as the load increased and turn off as it decreased. They would fight each other for control if set wrong.
Thanks. I thought so and just wanted to confirm.
Old 07-15-2014, 08:55 AM
  #5  
Senior Member Admiral's Club Member
THT sponsor
 
Join Date: Jan 2014
Posts: 1,556
Likes: 0
Received 2 Likes on 2 Posts
Default

For your application, you will most likely have a waterproof charger. Most waterproof chargers are multi voltage system.

This basically means if you have 2 batteries connected in series or parallel, you CANNOT just put one bank on them. You need to check the specs on the charger before doing that. This is a common disagreement I have with many on the forum.

Off the top of my head I know ProTournmanets, XPS, XPS iT, ProSports, and Cabellas need one bank per battery. Connect it the wrong way, boat catches fire, liability is on you for improper connection.

If you have 2 connected and that is all you want to charge, get a 2 bank charger and connect both. The computer will understand the connection. If you have a 3rd starter and want to charge that, you need a 3 bank charger.

Now these is for a waterproof system. Most dry mounts, like a ProTech i or ProNautic will support 2 batteries per bank in parallel. However, this is a different application.

Feel free to message me if you like.
Old 07-15-2014, 08:56 AM
  #6  
Senior Member Admiral's Club Member
THT sponsor
 
Join Date: Jan 2014
Posts: 1,556
Likes: 0
Received 2 Likes on 2 Posts
Default

Originally Posted by jetboat69 View Post
Use just one side of the charger. Using the two connected together without a common charge controller to
load share, it may cause them to oscillate as one tries override the other.
We always had to adjust a string of smart charging rectifiers to come on line one at a time as the load increased and turn off as it decreased. They would fight each other for control if set wrong.
If two batteries are connected in series or parallel, they need to be the same age, spec, and preferably the same model. This what they charge and discharge in sync. Therefore a charger connected to them should charge equally.

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright © 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.