Chart plotter and battery wiring question

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JAdams1

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I all, I have (2) Interstate deep cycle marine batteries (new this spring) connected to my rotary selector switch. I alternate using battery 1 and battery 2 every trip, charging system working. The chart plotter is wired to the main power buss (7.5 amp fused). When I restart the engine after drifting, the chart plotter reboots. Do I need to dedicate one battery as a house battery and power the chart plotter from that source. I like alternating the batteries so I know they are in good working order and they get charged when I am running. Any thoughts? Thanks.
 
Deep cycle batteries do not make good starting batteries. If they are not over built capacity wise the voltage drop will be quite a bit more than a regular starting battery. I have a bank of each type and start on the "starting" battery and use the deep cycle for house loads.
 
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Wasn't this issue 'talked' about in a different post? I remember responding to the question and suggested a few tests be done.
Just in case this is a new post, in summary my assessment is:
What changed? Was it just a new starter or were other things like batteries changed.
Did you check all battery connections for corrosion or loose lugs?
Have you made sure that the large gauge cable that connects the negative terminals of both batteries together is still installed?
What if any other wiring changes have you made.
 
seasick said:
Wasn't this issue 'talked' about in a different post? I remember responding to the question and suggested a few tests be done.
Just in case this is a new post, in summary my assessment is:
What changed? Was it just a new starter or were other things like batteries changed.
Did you check all battery connections for corrosion or loose lugs?
Have you made sure that the large gauge cable that connects the negative terminals of both batteries together is still installed?
What if any other wiring changes have you made.
Click to expand...

You did! I posted the link above with what my end “resolution” was
 
seasick said:
Wasn't this issue 'talked' about in a different post? I remember responding to the question and suggested a few tests be done.
Just in case this is a new post, in summary my assessment is:
What changed? Was it just a new starter or were other things like batteries changed.
Did you check all battery connections for corrosion or loose lugs?
Have you made sure that the large gauge cable that connects the negative terminals of both batteries together is still installed?
What if any other wiring changes have you made.
Click to expand...
No changes. Just looking for options to consider. Connections are clean. No wiring changes. Wired from factory but I will check. Thanks
 
I found this as a solution to keep my chart plotter from rebooting on the Raymarine forums that I am considering. It is a momentary 12VDC UPS that provides 12V only during cranking. This will allow me to alternate between battery 1 and 2 on subsequent trips and always have a backup battery to get me home.

This is the UPS.

dcpoweronboard.com

DC UPS: StartGuard - Newmar DC Power Onboard

The abrupt DC system voltage drop that accompanies engine starting can cause communication/navigation electronics to “dump” programmed memory. StartGuard solves this problem by providing supplemental voltage to sensitive electronics while the engine is cranked. It contains a sealed rechargeable...
dcpoweronboard.com

Here is the wiring schematic.

wiring schematic.jpg
 
Mini_Add-A-Battery_Kit_-_65A
maybe mount the switch under the gunnel so you don't have to open hatches all the time.....

Also..not a fan of using straight deep cycle batteries for starting large motors...when time come to replace I would go with Dual Purpose marine batteries.
 
SkunkBoat said:
Mini_Add-A-Battery_Kit_-_65A
maybe mount the switch under the gunnel so you don't have to open hatches all the time.....

Also..not a fan of using straight deep cycle batteries for starting large motors...when time come to replace I would go with Dual Purpose marine batteries.
Click to expand...
I did not know there were dual purpose batteries, I thought there were only two, cranking and deep cycle. My batteries are new so I will adapt them with a solution. Thanks for the feedback.
 
Forget another device that can go bad and just put a dedicated house battery into the mix. I hate how Grady designed (at least the old) systems of sharing a start/house battery. I went with a BEP switch and 2 large AGM batts for my house bank (200+ aH) and dedicated start batts for each engine.
 
Problem fixed. I started out checking all connections and found some corrosion on my 40A breaker which feeds my buss behind the helm that the chart plotter gets power from. I cleaned both terminals and applied a thin coat of silver conductive paste on all parts. The chart plotter no longer reboots when I restart my engine.

IMG_2558.jpgIMG_2557.jpg
 
Thanks for sharing. I have a different design than yours with the 40a breaker but mine looks in bad shape and I’m going to just replace it. I’ll probably start a thread asking for input as I came across a few different types and not sure of the pros/cons of each.
 
amamola said:
Thanks for sharing. I have a different design than yours with the 40a breaker but mine looks in bad shape and I’m going to just replace it. I’ll probably start a thread asking for input as I came across a few different types and not sure of the pros/cons of each.
Click to expand...
the red button sucks ..get rid of it...get what is shown in the picture
 
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