The Fishing Website : Discussion Forums : Dual battery charging https://www.fishing.net.nz/forum/ Mon, 01 Jun 2026 06:25:18 +0000 Thu, 07 Aug 2014 19:38:25 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.01 360 https://www.fishing.net.nz/forum/RSS_post_feed.asp?TID=102884 <![CDATA[The Fishing Website : Discussion Forums]]> https://www.fishing.net.nz/forum/forum_images/web_wiz_forums.png https://www.fishing.net.nz/forum/ <![CDATA[Dual battery charging : Both batts seem to be at full...]]> https://www.fishing.net.nz/forum/forum_posts.asp?TID=102884&PID=1474937&title=dual-battery-charging#1474937 Author: 3rnzir
Subject: 102884
Posted: 07 Aug 2014 at 7:38pm

Both batts seem to be at full charge @ 14.4v.
batt iso/switch is set to the OFF position.
Multimeter have both batts equalised.
Charging via a CTek comfort connector on batt 1.
Will check again tomorrow at some stage.
Cheerz
]]> Thu, 07 Aug 2014 19:38:25 +0000 https://www.fishing.net.nz/forum/forum_posts.asp?TID=102884&PID=1474937&title=dual-battery-charging#1474937 <![CDATA[Dual battery charging : Im not a big fan of sola panels,...]]> https://www.fishing.net.nz/forum/forum_posts.asp?TID=102884&PID=1474936&title=dual-battery-charging#1474936 Author: Kandrew
Subject: 102884
Posted: 07 Aug 2014 at 7:36pm

Im not a big fan of sola panels, you need to have a very high quality unit to have something that will be trouble free for a long period. Good ones don't come cheap and add the cost of the regulator and your up for some real money. You cant beat the Ctek units to keep your battey in good condition. ]]> Thu, 07 Aug 2014 19:36:58 +0000 https://www.fishing.net.nz/forum/forum_posts.asp?TID=102884&PID=1474936&title=dual-battery-charging#1474936 <![CDATA[Dual battery charging : LBG Matt.Looked at this option...]]> https://www.fishing.net.nz/forum/forum_posts.asp?TID=102884&PID=1474869&title=dual-battery-charging#1474869 Author: 3rnzir
Subject: 102884
Posted: 07 Aug 2014 at 5:18pm

LBG Matt.
Looked at this option myself before my batts went flat,hence the CTek purchase.
With the solar option I found a NZ kayak website that explained this option.
The regulator or MTTP was a Genasun GV5 model the  solar panel was a flexible unit from some ChCh outfit.
The flexi solar panel can tie/fix onto your boat somewhere if venturing away from a mains power supply on say a long weekend fishing mission.
Then place the panel on the side of your shed that gets some sunshine time at home.
Keeps boat batts on a float setting/charge.
Looked like a good set up.
Costs around $350 all up.
Not too bad for a portable unit I guess.
Cheerz
]]> Thu, 07 Aug 2014 17:18:17 +0000 https://www.fishing.net.nz/forum/forum_posts.asp?TID=102884&PID=1474869&title=dual-battery-charging#1474869 <![CDATA[Dual battery charging : There are proper dual battery...]]> https://www.fishing.net.nz/forum/forum_posts.asp?TID=102884&PID=1474865&title=dual-battery-charging#1474865 Author: Tagit
Subject: 102884
Posted: 07 Aug 2014 at 5:11pm

There are proper dual battery solar regulators. That is what you need. Connecting a single output regulator to both batteries is like wiring the two batteries together.]]> Thu, 07 Aug 2014 17:11:01 +0000 https://www.fishing.net.nz/forum/forum_posts.asp?TID=102884&PID=1474865&title=dual-battery-charging#1474865 <![CDATA[Dual battery charging : I&#039;ve got a similar question,...]]> https://www.fishing.net.nz/forum/forum_posts.asp?TID=102884&PID=1474860&title=dual-battery-charging#1474860 Author: Taking Time
Subject: 102884
Posted: 07 Aug 2014 at 4:57pm

I've got a similar question, I want to set up a solar panel to keep my batteries topped up while not in use. 
I was thinking of using a 10W solar panel and a solar regulator to keep from over charging/draining etc and like Kandrew I don't want to leave the battery switches left on.

I have two questions,

1. Sould I use 1 regulator with connections to each battery to keep them seperated, or use 2.
2. If using two regulators, is it fine to run them off the 1 solar panel.

If anyone knows the answers that would be great. cheers
]]> Thu, 07 Aug 2014 16:57:21 +0000 https://www.fishing.net.nz/forum/forum_posts.asp?TID=102884&PID=1474860&title=dual-battery-charging#1474860 <![CDATA[Dual battery charging : As long as the voltage meets the...]]> https://www.fishing.net.nz/forum/forum_posts.asp?TID=102884&PID=1474538&title=dual-battery-charging#1474538 Author: Kandrew
Subject: 102884
Posted: 06 Aug 2014 at 6:58pm

As long as the voltage meets the right voltage level the VSR will kick in and charge both batteries. I don't do this on my tinny, don't like the battery being left on. I turn the battery switch to off and just change the battery charger over to the other battery every couple of weeks. Use the Ctek battery indicators the ones with the three LEDs on both batteries. They are really good and let you know where the charge of your battery is at a glance. Also a quick way to plug the charger.

Interesting comment about the different algorithm, never had that problem with the batteries you use.]]> Wed, 06 Aug 2014 18:58:58 +0000 https://www.fishing.net.nz/forum/forum_posts.asp?TID=102884&PID=1474538&title=dual-battery-charging#1474538 <![CDATA[Dual battery charging : AquaMike.Yes,2 x 1000 CCA 130AHs...]]> https://www.fishing.net.nz/forum/forum_posts.asp?TID=102884&PID=1474285&title=dual-battery-charging#1474285 Author: 3rnzir
Subject: 102884
Posted: 06 Aug 2014 at 8:06am

AquaMike.
Yes,2 x 1000 CCA 130AHs LiFePo4 batts.
Had to buy a CTek Lithium XS charger (different algorithms to a lead acid charger)
Will try setting the Iso/switch to the #1 setting(same setting as regular OB running).
Then will place charger on #1 batt,and record volts/charge  on batt #2 with multimeter to see if batt # 2 is being topped up.
Works fine on that setting for both batts via the OB alternator (Opti 65 amp output)
After a float charge when boat is in the shed for those weeks I cant get out during winter.
Will keep Y`all posted on outcome.
Cheerz 
]]> Wed, 06 Aug 2014 08:06:11 +0000 https://www.fishing.net.nz/forum/forum_posts.asp?TID=102884&PID=1474285&title=dual-battery-charging#1474285 <![CDATA[Dual battery charging : A VSR works like this, you have...]]> https://www.fishing.net.nz/forum/forum_posts.asp?TID=102884&PID=1474195&title=dual-battery-charging#1474195 Author: Kandrew
Subject: 102884
Posted: 05 Aug 2014 at 8:26pm

A VSR works like this, you have 2 batteries, With your 3 way switch you select 1 battery to run from while sitting at anchor so the other battery stays charged if you need it to start. When the engine starts and the voltage gets to a level the VSR joins both batteries together so both are charged. When the engine is turned off the voltage drops down under the level the VSR drops and disconnects the 2 batteries from each other. You are left drawing from the battery you have switched on.

In larger boats you can run a deep cycle house battery for running off at anchor and a high discharge starting battery for starting. In my boat I run 2 normal marine starting batteries, I run out fishing on one battery and leave that one switched on to run lights and electronics while I'm anchored then I switch over to the other battery when I head home. If needed I can join both batteries together with my battery switch if I need the extra crank. Have never needed to because I use a ctek charger at home.

This is a pretty standard setup.]]> Tue, 05 Aug 2014 20:26:10 +0000 https://www.fishing.net.nz/forum/forum_posts.asp?TID=102884&PID=1474195&title=dual-battery-charging#1474195 <![CDATA[Dual battery charging : If you have 2 different batteries...]]> https://www.fishing.net.nz/forum/forum_posts.asp?TID=102884&PID=1474078&title=dual-battery-charging#1474078 Author: Steps
Subject: 102884
Posted: 05 Aug 2014 at 5:30pm

If you have 2 different batteries in parallel of the same voltage and type (eg lead acid) it doesnt matter and also doesnt matter if at different charge levels.. (See my post above)
The charger will supply each battery as required according to the internal resistance of each until each match the cut off requirement of the charger   ie  if 1 is fully charged it will no longer draw current  and the other will draw till it also is charged

Now if those batteries where say 6V on a 12v charger in series , very different kettle of fish as all current has to be drawn thu both batterys...so if one is still not charge it will stil draw the current thru the charged one to get charged (not strictly correct , u get the concept?)
]]> Tue, 05 Aug 2014 17:30:55 +0000 https://www.fishing.net.nz/forum/forum_posts.asp?TID=102884&PID=1474078&title=dual-battery-charging#1474078 <![CDATA[Dual battery charging : BEP do a VSR (VOLTAGE SENSITIVE...]]> https://www.fishing.net.nz/forum/forum_posts.asp?TID=102884&PID=1474021&title=dual-battery-charging#1474021 Author: Tonto2
Subject: 102884
Posted: 05 Aug 2014 at 3:06pm

BEP do a VSR (VOLTAGE SENSITIVE RELAY),  the idea is that when the start battery has reached charge the current from the alternator is then sent to top up the second battery, it is a good system provided you have a big enough alternator. Some outboards like mine only have a 7 amp alternator and it is a struggle. Just hook the smart charger to the start battery.]]> Tue, 05 Aug 2014 15:06:10 +0000 https://www.fishing.net.nz/forum/forum_posts.asp?TID=102884&PID=1474021&title=dual-battery-charging#1474021