Battery?

[myers]

I have a 2013 RZ2 not that it matters for the question at hand. I have never replaced my batteries. It currently has 2 interstate batteries, towards the end of season one seemed to hold charge the other would not. The marina I store my boat will replace them at a hefty price, but i can do myself. They do not sale interstate at the marina. What are suggestions on brand and best place to order from?

[ktm450exc]

I buy the cheap deep cycle battery at Auto Zone. I keep a battery Tender on both batteries during the winter and I get 4 years of life out of the batteries.

[freeheel4life]

I prefer Intersstate.
https://www.interstatebatteries.com/...rch=birmingham, AL
Lots of dealers in your area. Deka or Sterling are decent too. Don't buy cheap Napa, O'reillys, or Duracell IMO. Some guys buy from Costco because of their crazy return policy. I say its not worth driving back and fourth from the marina to Costco to return them, and you will in a year or so from what Ive seen unless they get put on a tender during lay up

[chpthril]

I use interstate int he shop, and have good success with them. With that said, any quality battery will serve you good if its maintained and serviced. Out of the interstate camp, you would want an SRM-24 and 24-XHD. Outside of interstate, you want a group-24 cranking and seep cycle.

Dont assume they are in the correct position when you pull the old ones out. Seen many with the cranking on the house side and deep on the cranking side.

[Brianrzr]

Which side is which?

[freeheel4life]

Which side is which?

Mike is always the guru, but my experience outboard battery is always cranking and inboard is deep when they are both on port side. Z1 and r21 split batteries. Poet is crank, stbd is deep.
Don't know what year that became standard, but seems like after 06 that was the standard. Maybe it ws later. There is an odd model that has gotten me in trouble where crank batt is in port locker behind the seat and house was under stbd seat...if I remember correctly

[myers]

Is there a benefit of running 2 cranking or 2 deep cycle batteries?

[freeheel4life]

There's kind of a lot of hypothetical there based on application. In the case of your boat (and most others) running dual cranking batts isn't really a benefit. The advantage to the cranking batteries is a higher Cranking Amps capacity. The more compression an engine has the higher the amp draw when cranking. Unless you were running a very large diesel you would never NEED dual cranking batts wired in parallel. Now there's definitely an argument for running dual deep cycles, and in fact we have been running dual deeps in all our Skiers Choice boats for a while now.
Benefits of deep cycle is right there in the name. They designed to be discharged to a low state of charge and recover when current is put back into them. They offer a lower cranking amperage though.
That's why you have one of each. Chpthrll can probably give you even more info.

[tigemech]

There's kind of a lot of hypothetical there based on application. In the case of your boat (and most others) running dual cranking batts isn't really a benefit. The advantage to the cranking batteries is a higher Cranking Amps capacity. The more compression an engine has the higher the amp draw when cranking. Unless you were running a very large diesel you would never NEED dual cranking batts wired in parallel. Now there's definitely an argument for running dual deep cycles, and in fact we have been running dual deeps in all our Skiers Choice boats for a while now.
Benefits of deep cycle is right there in the name. They designed to be discharged to a low state of chargr
That's why you have one of each. Chpthrll can probably give you even more info.

That is true and it gets a little complicated with the charging systems in the newer tiges. They way they Charge is once the cranking battery becomes fully charged then it will charge the house battery. The only problem with running a deep cycle is they also dont like to be constantly charged. While the problem with running two cranking batteries is they dont like to be drained and recharged. The group 24 instertate batteries cranking battery has a 135 reserve capacity while the deep cycle has a 140 reserve capacity. 5 extra minutes isnt a whole lot. I dont really have a good answer to what is better as they both have their benefits and disadvantages. I usually recommend running two cranking batteries as from what ive seen is they seem to last a little longer.

[chpthril]

In a setup like the tige where we have a clear cut dedicated house bank and dedicated c ranking bank, I prefer a cranking and a deep when running wet cell lead acid. Doesnt really matter with AGM. Although a deep cycle will crank an engine, I dont like for that to be its primary job. With a regulated alternator and a working VSR/ASR, i dont worry much about over charging a deep cycle while the boat is in use. Theres enough load that the the alternator is really just covering the spread, not just charging a static battery. Lack of or improper maintenance I think, is the biggest battery killer. Too many house banks get put away depleted. Spend the day at the sand bar hammering on the stereo, then a short 15 minute ride back to slip/ramp. Battery is still low when the boat is put away. Needs to be charged right then. Yes, I understand this is not always feasible for all. some dont have an on-board charger or access to 110AC where the boat goes. Sometime sits just a matter of having the time to do it, and 6PM on Sunday evening i snot, when the kids are tired and sunburned and the wife is fed up with your drunk obnoxious friends Every one just want to call it a day.

[freeheel4life]

^^Mike nails it as usual. Lack of maintenance/tending seems to be why I change out more batteries than anything. My favorite is the super swelled case. Most don't realize that the acid and water will drop out of solution when battery SOC gets too low. Then in our cold weather the water freezes and you can physically see it in the plastic case. Often will test for a bad cell as the plates short internally. Not all the time, but see it more than Id like. Some people will make no efforts to maintain battery how much you try to educate.
I guess with the constant charging thing, even with a VSR/ASR/ isolator it will always send some current to batteries right?? Otherwise it creates an open between batt and alt, and voltage regulator will spike and try to charge at very high voltage(high field current) ya??

[talltigeguy]

CHPthrl is right as usual. For the OP question, what he said.

I think it is also important to consider what your system is set up like. If you have an older 1-2-combine switch, without a VSR, then I prefer getting identical batteries. When you are in combined mode, the batteries are combined when both charging and not charging and are constantly transferring power back and forth, which will kill one of the batteries prematurely if you have batteries that are not the same.

[Brianrzr]

Has anybody installed a "Blue Sea Batterylink 10amp Charger #7605"? I know many factors are involved, but on average, how long does it take an Indmar to recharge a battery after 1,800 watt amps at the sandbar for an hour?

[rcoates2]

I spent about $300 for a Lifeline battery. The Navy uses this one and the guy I bought it from said he has never replaced one.

[chpthril]

Has anybody installed a "Blue Sea Batterylink 10amp Charger #7605"? I know many factors are involved, but on average, how long does it take an Indmar to recharge a battery after 1,800 watt amps at the sandbar for an hour?

Yes, there are factors. Im not sure if that charger is 5A each bank or distribute on demand and capable of sending its 10A capacity to one bank or the other. So you would have to calculate using the house bank's total Ah and then 5A and again with 10A, in order to get an idea of how long it will take that charger to recharge your depleted house bank.

As to the alternator. How long to recharge after an hour with an 1800W amp is like how long to get to LA with a 450 HP engine. Advertised AC wattage outputs of an amp are unreliable to use for finding the amplifier's DC amperage current draw from a battery, because there is no real formula for using the AC watts to get DC amps. This can be estimated at best, as music is so dynamic, its hard to get a constant. Lastly, it will take way longer then many think, for a typical alternator to recharge a dead battery.

IIRC, your engine has a 90A alternator. The integrated ACR in the charger is rated for 65A. FYI