Cost of 8D Batteries

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Re: Cost of 8D Batteries

Reply #25 – October 15, 2016, 11:01:51 pm

Quote from: jcus – October 15, 2016, 08:35:59 pm

I believe that deka makes the o'reilly agm battery, about $440 with no discount.

Plus, there is no shipping charge, and you can usually sweet-talk the O'Reilly's guys into swapping out the batteries for you. Back saver!

Re: Cost of 8D Batteries

Reply #26 – October 15, 2016, 11:12:03 pm

I have been looking at L16 sized AGM batteries. 6 volts so you need two in series to get 12 volts. These are 415 amp hrs each. Still 415 at 12 volts too. They look to be mid $400's and up for FullRiver batteries with a 7 yr warranty. They are 11-5/8"x7-1/8"x16-3/4" high. You can get four of these in the space 2 8D's use. Lifeline makes these too. About $550. Four of these replacing three 8Ds, about the same price at the higher end, 830 amp hrs compared to 730 amp hrs . Interesting to consider. There are lower priced ones too with less warranty. Worth a look.

Re: Cost of 8D Batteries

Reply #27 – October 18, 2016, 12:32:38 pm

I've decided to go with Gel Cells manufactured by East Penn. I have ordered them from Mullet Battery Inc. in Goshen IN. Cost is $649.00 with core exchange. And they will install the batteries. Thanks to everyone for their comments and information.

Re: Cost of 8D Batteries

Reply #28 – October 18, 2016, 12:46:44 pm

Be sure to adjust your charger for the gels if not already done.

I undercharge ours a bit on the non stepped charge alternator. 13.6 volts at the battery.

And use a fairly conservative charge from the charger of 1/5th C C being capacity.

So 675 amp hours is 130 amps which is what foretravel speced new in our heart freedom 2500 or what a new magna sin 2812 puta out.

Being as we do not have a battery monitor system I took the lowest charge voltage that works regardless of the temp of 13.7 volts.

You can go higher depending on the temp if your system is adjustable but would need to adjust the voltage differently in warm versus cool weather.

The mk engineer told me their older gels had a lot of 10-12 year users and the new plate charging/testing setup before installation and the new plate mounting system could double that.

After using and selling countless used rv's for many years in the biz I learned to put the best batteries possible in any coach.

Less problems. More fun.

By the cycle life your new set will probably turn out to be the least expensive over their life.

Good available power as the temps drop also

Re: Cost of 8D Batteries

Reply #29 – October 18, 2016, 01:09:59 pm

Quote from: Larry & Karen Pontius – October 18, 2016, 12:32:38 pm

I've decided to go with Gel Cells manufactured by East Penn. I have ordered them from Mullet Battery Inc. in Goshen IN. Cost is $649.00 with core exchange. And they will install the batteries. Thanks to everyone for their comments and information.

Be certain that your charging system (both from the engine alternator and from your inverter/charger) are set properly for gel batteries. They can be damaged if the charging system is set up for wet-cell and/or AGM batteries.

Re: Cost of 8D Batteries

Reply #30 – October 19, 2016, 07:56:58 am

Yesterday I replaced our 9 year old MK gels with O'Reilly AGM's after their capacity had declined to the point where they couldn't make it thru the night at our level of electric usage.

Re: Cost of 8D Batteries

Reply #31 – October 19, 2016, 09:05:32 am

Did you replace them by yourself Brett ?

Re: Cost of 8D Batteries

Reply #32 – October 19, 2016, 10:07:55 am

Quote from: D.J. Osborn – October 18, 2016, 01:09:59 pm

Be certain that your charging system (both from the engine alternator and from your inverter/charger) are set properly for gel batteries. They can be damaged if the charging system is set up for wet-cell and/or AGM batteries.

How do you set the alternator for agm?

Re: Cost of 8D Batteries

Reply #33 – October 19, 2016, 10:23:34 am

$449.99
Super Start Fleet & Heavy Duty - Battery
http://www.oreillyauto.com/site/c/detail/SSBL/AGM8D/N2493.oap?ck=Search_N2493_-1_-1&pt=N2493&ppt=C2389

doesnt list the AH of the battery ..anyone know what the AH is on this one?

$191.99
Super Start Fleet & Heavy Duty - Battery (might not be AGM) not sure
http://www.oreillyauto.com/site/c/detail/SSB5/8D2/N0369.oap?ck=Search_N0369_-1_-1&pt=N0369&ppt=C0327

says its 325ah

Re: Cost of 8D Batteries

Reply #34 – October 19, 2016, 10:25:43 am

Quote from: DavidS – October 19, 2016, 10:07:55 am

How do you set the alternator for agm?

Standard wet-cell and AGM batteries have the same charging-voltage requirements and so no special setting is required for AGM batteries.

Re: Cost of 8D Batteries

Reply #35 – October 19, 2016, 10:31:10 am

Quote from: DavidS – October 19, 2016, 10:23:34 am

$449.99
Super Start Fleet & Heavy Duty - Battery
http://www.oreillyauto.com/site/c/detail/SSBL/AGM8D/N2493.oap?ck=Search_N2493_-1_-1&pt=N2493&ppt=C2389

doesnt list the AH of the battery ..anyone know what the AH is on this one?

If you will just scroll down the page you linked, you will see all the AH ratings for the battery.

The other battery you linked is a conventional flooded wet cell.

Re: Cost of 8D Batteries

Reply #36 – October 19, 2016, 10:36:36 am

Quote from: Chuck & Jeannie – October 19, 2016, 10:31:10 am

If you will just scroll down the page you linked, you will see all the AH ratings for the battery.

The other battery you linked is a conventional flooded wet cell.

I did and is shows min
Reserve Capacity (min): 480 Minute
same as AH?

Re: Cost of 8D Batteries

Reply #37 – October 19, 2016, 10:44:16 am

The standard Amp Hour rating that you will find published for deep cycle batteries is given at the 20 hour rate. The O'reilly page actually gives several including the the 20 hour rate.
20 Amp Hour Rate (Ah): 245Ah
Don

Quote from: DavidS – October 19, 2016, 10:36:36 am

I did and is shows min
Reserve Capacity (min): 480 Minute
same as AH?

Re: Cost of 8D Batteries

Reply #38 – October 19, 2016, 10:53:35 am

Quote from: DavidS – October 19, 2016, 10:36:36 am

I did and is shows min
Reserve Capacity (min): 480 Minute
same as AH?

David,

Perhaps the device you are using to view the page does not display the same thing I am seeing. Here is what I see at the bottom of your linked AGM8D page:

ADDITIONAL DETAILS
Reserve Capacity At 25 Amps (min): 517 Minute
Reserve Capacity At 75 Amps (min): 138 Minute
10 Amp Hour Rate (Ah): 250Ah
20 Amp Hour Rate (Ah): 245Ah
5 Amp Hour Rate (Ah): 197Ah
6 Amp Hour Rate (Ah): 202.8Ah
1 Amp Hour Rate (Ah): 151Ah
100 Amp Hour Rate (Ah): 250Ah
3 Amp Hour Rate (Ah): 182Ah
8 Amp Hour Rate (Ah): 212Ah
Reserve Capacity At 15 Amps (min): 953 Minute
Reserve Capacity At 5 Amps (min): 3040 Minute
Reserve Capacity At 50 Amps (min): 230 Minute
Reserve Capacity At 8 Amps (min): 1874 Minute
Electrolyte Composition: Glass Mat
Terminal Style: SAE

Re: Cost of 8D Batteries

Reply #39 – October 19, 2016, 10:59:17 am

Quote from: Chuck & Jeannie – October 19, 2016, 10:53:35 am

David,

Perhaps the device you are using to view the page does not display the same thing I am seeing. Here is what I see at the bottom of your linked AGM8D page:

ADDITIONAL DETAILS
Reserve Capacity At 25 Amps (min): 517 Minute
Reserve Capacity At 75 Amps (min): 138 Minute
10 Amp Hour Rate (Ah): 250Ah
20 Amp Hour Rate (Ah): 245Ah
5 Amp Hour Rate (Ah): 197Ah
6 Amp Hour Rate (Ah): 202.8Ah
1 Amp Hour Rate (Ah): 151Ah
100 Amp Hour Rate (Ah): 250Ah
3 Amp Hour Rate (Ah): 182Ah
8 Amp Hour Rate (Ah): 212Ah
Reserve Capacity At 15 Amps (min): 953 Minute
Reserve Capacity At 5 Amps (min): 3040 Minute
Reserve Capacity At 50 Amps (min): 230 Minute
Reserve Capacity At 8 Amps (min): 1874 Minute
Electrolyte Composition: Glass Mat
Terminal Style: SAE

No it was not.. couldnt see any of that.. makes sense now lol.. Thank you very much

Re: Cost of 8D Batteries

Reply #40 – October 19, 2016, 11:03:33 am

Quote from: DavidS – October 19, 2016, 10:59:17 am

No it was not.. couldnt see any of that.. makes sense now lol.. Thank you very much

Why is the 100 AH rate the same as the 10 AH rate? And other numbers look peculiar too.

Re: Cost of 8D Batteries

Reply #41 – October 19, 2016, 11:10:09 am

Quote from: craneman – October 19, 2016, 11:03:33 am

Why is the 100 AH rate the same as the 10 AH rate? And other numbers look peculiar too.

Don't know... Perhaps Don can tell us - he is smart!

Re: Cost of 8D Batteries

Reply #42 – October 19, 2016, 11:54:18 am

Quote from: craneman – October 19, 2016, 11:03:33 am

Why is the 100 AH rate the same as the 10 AH rate? And other numbers look peculiar too.

Those numbers look fishy. Higher current loads should produce fewer total Amp hours.

Re: Cost of 8D Batteries

Reply #43 – October 19, 2016, 12:00:03 pm

Not that smart! Obviously a mistake on the O'Reilly website. I don't find the 100AH rate quoted anywhere on the East Penn/Deka web pages... Anyway, since the AH rate is the amount of current that can be drawn from a battery for a given time until discharged, there is no way that both of those figures are correct. However, as the 20AH rate and the other specs on the East Penn websites line up with the the O'Reilly page (CCA, MCA, reserve capacity, etc.), I think I can trust the 20AH rate of 245AH to be correct.
Don

Quote from: Chuck & Jeannie – October 19, 2016, 11:10:09 am

Don't know... Perhaps Don can tell us - he is smart!

Re: Cost of 8D Batteries

Reply #44 – October 19, 2016, 12:16:59 pm

Agm's are 245.

Mk Gels are 225. After some cycling most test higher.

Gels have more available power as the temps drop. Plus double the cycle life.

If memory serves me the flooded cell and agm's can be bulk charged at 14.5 volts.

The mk gels max bulk charge volts is 14.15

Both are dependent on temps at the battery.

My solar and alternator are set for our gels at 13.6.

Inverter is at the 14.15 as it is a three step design. Bulk, acceptance and float.

Fully charged resting battery disconnected for 24 hours is 12.85 volts as far as I have seen

Re: Cost of 8D Batteries

Reply #45 – October 20, 2016, 07:28:03 am

O'Reilly's was so good. I parked on a side street behind the store and loosened all the terminals. They then brought out the three batteries with a hand truck. Two young guys pulled out the top battery after I insulated the terminals, followed by the two lower ones. They were replaced in reverse order. I wish I had had an opportunity to clean and paint the racks, but no chance. It was surprising that there was white corrosion product on the steel, even though the racks have only ever seen gels. I tipped the guys for efforts.

I had to re-set the inverter for the battery type and capacity.

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