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Posts: 1100
| So i have a smaller aluminium boat, with a 24V trolling motor system set up, the 24V set up have plenty of power for my fishing, so I was wondering if any one have experience using a 24v to 12v converter to power the NMEA network, graph, a.s.o.
The idea was to keep the Outboard cranking battery cranking only, and save the weight of a 4th battery for the misc. equipment.
would like a just buy a couple of Lithium batteries for everything, but they are kinda pricey
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Posts: 16632
Location: The desert | Can you fit a 31 size cranking battery in your boat? Even a 27 is probably ok. If so, get one and run graphs, nm2k, and other accessories off that. Leave the TM batteries specifically for it. I run all of my accessories off my cranking battery with zero issues. 2 HDS units, and will add nmea if it ever gets power... |
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Posts: 1100
| My cranking battery is a 24 category as far as i understand (we don't use those battery terminologies here in Europe) its a 70ah with a CCA rating of 650, the outboard is a Mercury F50.
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Posts: 16632
Location: The desert | Zinox - 5/1/2018 12:41 PM
My cranking battery is a 24 category as far as i understand (we don't use those battery terminologies here in Europe) its a 70ah with a CCA rating of 650, the outboard is a Mercury F50.
Gotcha....find your equalivalemt battery in the biggest size you can fit in your boat. Run everything off of that battery, keep TM batteries for TM only. |
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Posts: 3475
Location: Elk River, Minnesota | Hiya,
Given a starting battery is designed for quick draw-down (starting) and quick recharge over multiple cycles, it can, over time wear down running all your electronics off of it. In such a case, I would say change your cranking battery out with a good dual purpose battery of some sort that has both cranking capabilities for starting, and has the slow draw-down capabilities of a deep cycle. Years ago, there was the "Stowaway" brand that was made like this, and I am sure there are plenty of battery makes out there that will have this capability. Many times they are considered RV batteries.
If you can get to a size 27 dual purpose for your main motor, you'd be all set.
Steve |
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Posts: 1100
| Thanks a ton for the inputs, ill try and figure out what fits in the boat. ill be Picking up the new mercury f50 Big tiller tomorrow so ill have a talk with the dealer and see what else they suggest, cant wait to give the set up a go :D |
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Posts: 256
Location: plant earth | Just grab power off of one of the trolling batteries i know they are wiring in series to make 24 volts but u can still use the + & - of 1 battery to get the 12 volt power |
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Posts: 3475
Location: Elk River, Minnesota | Hiya,
Granted taking power off of one of the two batteries would work for a source of power, but running electronics that are becoming more and more sensitive off of a same battery as the trolling motor many times sets up an interference issue. That is why boats are normally wired with all electronics tying back to the main starting battery and the trolling motor batteries isolated just for that.
Steve |
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