Deka AGM 12 Volt Intimidator 8A4D Batteries

[MotorVation]

I'm wondering if these batteries would be decent for solar. I have 590 watts of panels and a Morningstar Tristar MPPT 45 amp controller.

I can pick up two of these 12v batteries for 500. barely used. They came of of a 2018 RV and were replaced with lithium. They've been on a trickle charger since they were taken out of service. I would have to test them of course.


They look like they may be dual purpose as the CCA's are listed. If so I'm going to pass.

Here's a link to a site that has the specs..
Deka 8A4D (8A4DM) AGM Battery

Thanks,
Bob

 

[tx2sturgis]

Seems like a really good price for two. 

I wouldnt worry about the CCA rating, because a battery that large can be rated for cold cranking amps since it can put out a lot of instant power for starting a stand-by or RV generator, tractors, large boat motors, etc.  

If you figure the new price, plus core charge, plus shipping, plus tax, to buy 2 of them brand new...thats quite a savings.

I found a few listings of about $500 to $600 each before shipping and tax.

BTW, thats about 260 pounds for a pair of them!

 

[MotorVation]

"Seems like a really good price for two. 

I wouldnt worry about the CCA rating, because a battery that large can be rated for cold cranking amps since it can put out a lot of instant power for starting a stand-by or RV generator, tractors, large boat motors, etc.  

If you figure the new price, plus core charge, plus shipping, plus tax, to buy 2 of them brand new...thats quite a savings.


BTW, thats about 260 pounds for a pair of them!"

_________________________________________________

Yeah, they're not cheap new and I'm not in a position to pay that. I was going to go with 4 FLA (flooded lead acid) so the weight would be almost the same. I'm going to contact the local seller and make sure they're still available..

 

[MotorVation]

It's not looking good. The seller hasn't returned my text. That's the way it goes on Craigslist.
If I hear back, I'll post.

Thanks,
Bob

 

[MotorVation]

The seller just got back to me. They sold one and only have one left. That's not going to do it for me. Anyway, there's one for sale here in Pinellas County Florida if anyone's interested.

Here's a link to the Craigslist ad.

Thanks again

Edit. The first link didn't work

https://tampa.craigslist.org/pnl/bpo/d/saint-petersburg-deka-agm-12-volt/6830268575.html

 

[Weldman]

Better off with pair of these and they got sale till April 1st of 10% discount.
https://www.renogy.com/renogy-deep-cycle-agm-battery-6-volt-260ah/

 

[MotorVation]

Thanks but I'd need 4 of them. That's not in the solar budget. I can get 4 Duracell 6 volt 235AH flooded lead acid for right around 600 bucks including core and tax from Batteries Plus. That's probably the way I'll go. AGM would be nice though

 

[Seminole Wind]

I'm wondering if these batteries would be decent for solar. I have 590 watts of panels and a Morningstar Tristar MPPT 45 amp controller.

I can pick up two of these 12v batteries for 500. barely used. They came of of a 2018 RV and were replaced with lithium. They've been on a trickle charger since they were taken out of service. I would have to test them of course.


They look like they may be dual purpose as the CCA's are listed. If so I'm going to pass.

Here's a link to a site that has the specs..
Deka 8A4D (8A4DM) AGM Battery

Thanks,
Bob

i would contact the company and see if they can provide you with a dept of discharge vs life cycle chart and then compare that to other known batteries like golf cart batteries. then look at your lifetime cost per amp hour and go from there. balance out the benifit of not having a core charge if that is the case and any other non standard issue

the price you mentioned is close ( in dollars per amp hour rating) to mid range new golf cart batteries. if they are in good condition and still have good capacity then they may be a fair deal. especially if they happen to fit your space better than something else or some other benefit...

but if their rated life cycles are half of the golf cart batteries then you are paying like double over the life...

 

[MotorVation]

but if their rated life cycles are half of the golf cart batteries then you are paying like double over the life...

Bingo. That's the main info I was looking for. I spent hours searching online and I did come across one chart that showed life expectancy per number of cycles and if I was reading it correctly, they were shown to have a life expectancy of only 350 or so cycles at a 50% discharge rate. (I don't remember the exact figures). That doesn't sound so great to me but I'm still learning so I thought I would start the post to see if anyone has more insight than myself.
Thanks..

 

[Seminole Wind]

Bingo. That's the main info I was looking for. I spent hours searching online and I did come across one chart that showed life expectancy per number of cycles and if I was reading it correctly, they were shown to have a life expectancy of only 350 or so cycles at a 50% discharge rate. (I don't remember the exact figures). That doesn't sound so great to me but I'm still learning so I thought I would start the post to see if anyone has more insight than myself.
Thanks..

ya, even generic golf cart batteries are going to do much better than that. trojan claims about 1200 cycles to 50% discharge for their golfcart and other real deep cycle batteries https://www.trojanbattery.com/products/deep-cycle-flooded/signature-line-flooded-2/

 

[Seminole Wind]

ya, even generic golf cart batteries are going to do much better than that. trojan claims about 1200 cycles to 50% discharge for their golfcart and other real deep cycle batteries https://www.trojanbattery.com/products/deep-cycle-flooded/signature-line-flooded-2/

of course, something to keep in mind, if you dont have quality recharge and float capability it doesnt matter many life cycles they "can" last if they get sulfated and die in the first year or so. (easily done)