Reply With Quotethat is the way my pontoon is .
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You may want to consider changing those battery connections and using the left battery as the 12 volt supply. As wired in your drawing, if any of your 12v accessories are grounded to the boat, and your TM is grounded to the boat you will be shorting out the battery on the left. A much safer way is to have all of the negative connections (12 or 24 volts) to be on the same side.(As shown below) While our drawings look similar they are electrically quite different when taking grounding into consideration.Originally Posted by DockShootinJack
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that is the way my pontoon is .
retired and now i will always fish
Crappie Wall Hanger II
How about two 12 volt trolling batteries and one smaller 12 volt battery for the light 12 volt loads?
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If someone really wants even draw off two batteries you can use a 24 volt to 12 volt step down converter. I do that up front because I can only access the 24 volt wires on my Key West, so I just step it down to run my livescope off 12 volts.
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That would be the beat way. Would also isolate the trolling motor and the electronics
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Trophy King
Handy PDF to have.
As MDCrappie pointed out in a multi volt series system(24,36,48Volts), there is a correct battery to connect to for the 12 volt source .
Minn Kota calls it the "low" battery. Page 4.
This prevents a higher voltage from ever reaching the lower voltage unit a series system.
Power converters can result in some capacity loss (slight) due to transmission losses of conversion.
Good Luck
https://www.minnkotamotors.com/sites...selct-gde1.pdf
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Thanks again. Space and weight are my biggest concerns. This is my lightweight knock around boat and simple is better. I’m still kicking around ideas, one would be a hand control, bow mount, salt water motor guide. They have a better reputation of being quieter from folks I’ve spoken with. Cost is also raising its ugly head. Wire from batteries to motor is $80, charger (2 bank) is more and then the battery too. Not appealing to my frugal side.
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It certainly add up quick these days
The love for fishing is one of the best gifts you can pass along
Trophy King
Please understand that this is not a hijack attempt, but used to bring up an interesting point because onboard chargers were mentioned in the post. Wiring two 12V batteries for 24V output .... Neg lead from load (TM) to neg side of battery one; pos side of battery one jumped to neg side of battery two. Pos side of battery two to pos side of load (TM). 24V output-- all is good.
Now hooking up the on board charger. Pos lead of bank one to pos terminal of battery one. Neg lead of bank one to neg terminal of battery one. Pos lead of bank two to pos terminal of battery two. Neg lead of bank two to neg side of battery two. Now for the interesting part. The neg lead of bank one AND the pos lead of bank two are electrically hooked TOGETHER. (a straight wire between the two) A phone call to MK and battery manufacture suggested the same cure. #1 disconnect the jumper wire while charging. #2 install an on/off switch in the jumper wire (which I did). Now if I can just remember to use the switch.
Mike
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You could always replace the switch with a relay wired to a master control switch to the console. Kill that switch when you leave the boat.
The love for fishing is one of the best gifts you can pass along
