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Thread: Interstate Batts & our RV
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03-20-2021, 02:30 PM #21
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Yep, that's definitely feasible. I'm putting together the parts for a 270 Ah LiFePO4 battery now, got about $650 into it I'd say. Small enough that I can easily drop a couple of them where my Interstate FLAs are now on the tongue of the trailer.
If not for that, I'd just have gotten a pair of 6V GC2s from Costco and been done with it.Current: 2021 Transcend 261BH, 2019 Ford F250 SRW SWB CC 6.2 - Picture
Previous: 2016 Jayco X213, 2014 F150 EB 3.5
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03-20-2021, 03:16 PM #222019 GMC 3500 SRW Sierra Denali Duramax
2020 Reflection 315RLTS
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03-21-2021, 12:26 PM #23
Battery choice
Msgt Ray (Ret) and Margie Parker
2022 GD 303RLS w/Gen-Y gooseneck
2020 Ram 2500 HD Cummins 6.7/3.73 gears
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03-22-2021, 12:02 AM #24
Costco sells 6v GC2 batteries for about 90 bucks each. I have had great luck with them.
Sent from my iPhone using Tapatalk2019 GMC 3500 SRW Sierra Denali Duramax
2020 Reflection 315RLTS
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03-22-2021, 08:03 AM #25
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03-22-2021, 08:42 AM #26
You get what you pay for with batteries. It usually shows up in the number of cycles. They are cheaper because the lead plates are thinner because they have used lesser quality or recycled lead. It can make what seems like a great deal in cost actually more expensive as it needs replacement more often. Going the the 6 volt route is a good move as you can maneuver them but more important the lead plates are thicker than say group 27/ 31
Most people I know who use Trojan wet cells and take the time for maintainence ( both water and de-sulfating) have the last 5 years. I’d go with the Trojans.Donna and Dave
Annapolis, Maryland
2021 Grand Design Imagine 2500RL / Dodge Ram Longhorn 2500 6.4 Hemi
350 W Newapower Solar: 3000 Victron Inverter/ Charger: Firefly Oasis carbon foam AGM
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03-22-2021, 09:01 AM #27
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03-22-2021, 08:58 PM #28
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There is a 12v golf cart battery that nobody seems to talk about. It is 12v, 150 ah and is made to deep cycle with thicker plates like all good golf cart batteries. Two of them will give you 300 ah with 150 ah useable (assuming a 50% depth of discharge). They are harder to find but Interstate has them. Look up the Interstate GC12-HCL-UTL.
All that being said, I like lithium if you are in it for the long haul.
BrianBrian & Shea+ Zeke & Roxy GSP’s
2018 GD Reflection 303RLS 800w solar 400ah LiFePO4
Sold 2018 Ford F-250 CCSB Lariat gas 2,980# payload
2024 Ford F-350 4x4 CCSB Lariat diesel 4,000# payload
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03-22-2021, 09:40 PM #29
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You have to be a pretty dedicated lead enthusiast to blow $600 on 150Ah of FLA . For not much more it's easy to source a pair of Trojan L16H-AC's and end up with 215 Ah usable.
But of course then there's the weight. That Interstate battery is 85 pounds. The L16H-AC are 125 back-breaking pounds apiece. Woof.Current: 2021 Transcend 261BH, 2019 Ford F250 SRW SWB CC 6.2 - Picture
Previous: 2016 Jayco X213, 2014 F150 EB 3.5
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03-22-2021, 10:01 PM #30
Sorry the advantage of the thicker plates is negated by the 84 lbs apiece and 50% usage like all lead acids except the Oasis. The thicker plates should be more cycles correct. So these batteries are $300 for 75 usable amps. Not really a deal IMHO. The specs say to excpect 500-1000 cycles if treated very well maybe lasting 5 years would be normal for a wet cell taken care of and de-sulfated
Insted of Lithium here’s an much better lead alternative than these golf carts. One of our 12 V Oasis Firefly carbon foam AGM at 112 ah. They can be drawn down to 20% vs 50% opposed to golf cart meaning you can get 98 ah vs 75 from the golf cart.
Another advantage is they start out as having 3000 cycles in them. They also don’t have to brought back to 100% charge like the golf cart. If you don’t do that with lead acid batteries, all most all of the time you stunt their potential. And they won’t hold the 150 ah potential anymore. The Oasis don’t have that restriction.
I’ve been for 20 years a user of Lifeline 6 volts until I found these batteries.
Im not comparing to lithium here, just other Lead acids.
https://oceanplanetenergy.com/advanc...asis-group-31/Donna and Dave
Annapolis, Maryland
2021 Grand Design Imagine 2500RL / Dodge Ram Longhorn 2500 6.4 Hemi
350 W Newapower Solar: 3000 Victron Inverter/ Charger: Firefly Oasis carbon foam AGM
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