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Thread: Dual batteries selection
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08-05-2020, 08:57 PM #11
Well said MLA. Motor homes charge both banks while running and then separate into the starting battery and the house batteries with the engine off. The two set of batteries are vastly different in design and function but can be using in an emergency. I didn't realize the same battery are on both sides of the switch. It sure isn't the optimal set up.
1998 Mobius
310 HP PCM
SOLD
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08-06-2020, 10:56 AM #12
This disscussion took place in the Autowake thread by Goose (Matt Brown with Moomba). Apparently, this is a big debate within Skiers Choice too LOL.
For me, I use BOTH (1&2), UNLESS Im parked with the stereo on, then I put it on 1 or 2.
I also always have my tinder plugged in when its stored, and use my boat often, so it really doesnt matter what I do. THIS was the biggest deciding factor when the debate went down. If you dont use a tinder frequently, then youll need to have some kind of rotation for maintaining the batteries. Rather you rotate usage, or use both at the same time.2019' Moomba Max
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08-06-2020, 11:11 AM #13This disscussion took place in the Autowake thread by Goose (Matt Brown with Moomba). Apparently, this is a big debate within Skiers Choice too LOL.
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08-06-2020, 12:15 PM #14
I posted this in another recent thread as well but here is a discussion about the battery switch that happened in 2017 on the "Autowake Questions" thread. It begins on page 9 and ends on page 11 if anyone wants to go look at it. This isn't where they were talking about the issues with the speakers as that was on a different more recent thread. This battery conversation came up here as they were discussing ballast timer settings and such.....
It doesn't look like they changed the wording in my 2019 manual and I can't see the 2020 manual online so not sure about it there.
I have always run mine on "1+2" and if my boat is not on the water then the charger is plugged in. I guess it is just a good habit that I started from my fishing boat.Last edited by TXSurf4; 08-06-2020 at 12:18 PM.
2019 Makai
Raptor 450 w/ 1.76 Trans
WakeMakers 1350s in the rear & 1K in Lead
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08-06-2020, 03:12 PM #15
I thought I read somewhere it was bad to run both 1+2 constantly, something about the excess load on the alternator. Personally I rotate between 1 or 2, and Ive only used 1+2 in an emergency need to the extra crack on the motor mode. Sounds like there isnt a wright or wrong...
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08-06-2020, 04:07 PM #16something about the excess load on the alternator.
In another scenario, say you have a single battery boat and carry a jump box. At anchor, you run the battery down, then have to use the jump box to restart that dead battery. Now say you have a dual bank setup and run the house bank down, turn switch to main, start engine, then turn back to 1+2. In both setups, you have one dead battery thats a load to the alternator.
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08-06-2020, 04:25 PM #17Senior Member
- Join Date
- Aug 2011
- Posts
- 2,522
Also by switching from 1 to 2 you may have a voltage difference between the batteries, ie one full and one empty. When you switch to 1&2 the batteries have to equalize which isn't good for them. The batteries will last longer if they're always equally charged and always being charged so 1&2 is the only option. Unless you like buying replacement batteries.
Last edited by parrothd; 08-06-2020 at 04:27 PM.
http://www.instgram.com/jlyons30
2002 Moomba Mobius LSV - Sold
2006 Moomba Mobius LSV - Sold
2017 Moomba Craz - Enzos, Lead
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08-06-2020, 05:16 PM #18
Awesome info makes sense. Thanks guys.
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08-06-2020, 06:25 PM #19
Sheesh!!! why does electrical stuff have to be so D*** complicated... FML.
I'll just stick to what I've been doing. Run on 1 or 2 and plugging in to on board charger at end of day. Clean and simple.2020 Supra SL 400
2015 Moomba Mojo(Sold)
2018 Yamaha Waverunner(Just to fool around)
2018 F150 Lariat
sport edition, 3.5lt ecoboost
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08-06-2020, 07:30 PM #20
If you have a cranking battery on one bank and a deep-cycle house battery on the other bank, they will NEVER be discharged and charged equally. So this has little to do with how long they last doing their job, compared to each others lifespan.
Its not complicated, it just comes down to what batteries you have, and how you use the boat. Someone else's plan, may not be wrong, but may not be best for you, due to the difference in use and battery type.
I have no issues with running in BOTH or 1+2 even with different type or size batteries with the engine running. With the alternator pumping in and active loads drawing off them no measurable or detrimental equalization will take place.