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Post by bushwacker on Jan 19, 2017 18:06:54 GMT -5
My boats battery for cranking has all the accessories and bait tank on it. I am worried it's going to run low on long days. I also have my 2 12V batteries hooked in series for my trolling motor under the console. These three batteries take up all the space and I really don't want to put another battery on the boat. There is a selector switch that just has the house battery on it right now in position #1. Can I hook the #2 position to one of the trolling motor batteries in case I'm in a pinch to start. Also would I be able to switch to both in case the trolling motor battery is low as well to pull from the house battery and the one trolling battery I'm hooked to?
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Yam
New Member
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Post by Yam on Jan 19, 2017 19:04:56 GMT -5
I would feel better if when you switched to 2 or both, your 2 tm batteries would also be put in parallel. In other words, the tm connection is broken and now your two tm batteries are a single 12 volt battery being equally discharged and charged. Switching back to 1 would then put the tm batteries back in series and ready to deliver 24 volts to your tm.
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Yam
New Member
Posts: 585
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Post by Yam on Jan 19, 2017 19:38:12 GMT -5
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Post by archenemy on Jan 20, 2017 7:43:05 GMT -5
My boats battery for cranking has all the accessories and bait tank on it. I am worried it's going to run low on long days. I also have my 2 12V batteries hooked in series for my trolling motor under the console. These three batteries take up all the space and I really don't want to put another battery on the boat. There is a selector switch that just has the house battery on it right now in position #1. Can I hook the #2 position to one of the trolling motor batteries in case I'm in a pinch to start. Also would I be able to switch to both in case the trolling motor battery is low as well to pull from the house battery and the one trolling battery I'm hooked to? It's doable but you need to make sure you connect to the first battery on the series or you will have a major problem. The other thing you need to consider is whether or not the TM batteries are grounded if you want to run electronics. Would be ok to use ungrounded just to start the motor. Get a set of jumper cables they come in real handy for that and helping others on the water. You may experience unwanted interference running your sonar off the TM batteries. Yams got a better idea though |
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Post by bushwacker on Jan 20, 2017 9:04:18 GMT -5
I do like the idea of that switch yam posted a little pricey and I'm just trying to figure out if there is a way that I can utilize the switch that I have on my boat and really just using it in a pinch. I haven't had an issue yet but the last time I was out a long time my fishfinder screen cut off and I cranked my motor and it sounded a little weaker. Also tossing around the idea of a lawnmower battery just for my bait tank.
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Brian
New Member
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Post by Brian on Jan 20, 2017 19:27:46 GMT -5
There is a selector switch that just has the house battery on it right now in position #1. Can I hook the #2 position to one of the trolling motor batteries in case I'm in a pinch to start. Also would I be able to switch to both in case the trolling motor battery is low as well to pull from the house battery and the one trolling battery I'm hooked to? The short answer is "Yes". You can do exactly what you propose and it's not a bad idea given your goal not adding a battery but having an emergency backup (switch position "2") or a hard wired jump start (switch position "Both"). You can use either TM battery as your emergency or jump start battery. Just make sure that the 2 systems are only tied together by the 2 new cables to the switch and the negative terminal of your cranking battery. Make sure put the switch back to "off" or "1" before charging. You won't hurt anything but might confuse the charger and/or not get a complete charge. |
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