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Old 04-19-2019, 08:15 AM   #1
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Join Date: Jun 2015
Location: Southern California
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Renogy LiFePO 170 ah Battery

Has anyone replaced their 2 Group 27 batteries with one of these. I know there are 30 less amps than going with 2 group 27's, but is there really an need for those extra 30 amps since the Lithium battery can be discharged down to 100% and the flood only to 50%. Savings of $300 and 15 lbs over 2 Lithiums. I'm just bringing this up because my step battery compartment is very very tight with the shunt for my Battery monitor and it would have to be moved. I normally use between 45-70 amp draw per day dry camping.
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2004 Winnebago Minnie 22e(went to a nice family Oct 3, 2015)
2016 Forester 2701DS (Aug 31, 2015)
2017 Camping 12 trips 38 nights
2018 Camping 10 trips 38 nights
2019 Camping 6 trips 19 nights
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Old 04-30-2019, 08:14 AM   #2
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The group 27's are closer in size to the 100ah renogy's.

But I can say I switched, they work great! I replaced 4x golf cart batteries rated at 430ah/s. To 2x 100ah renogy's as you can generally only extract 50% of your lead acid batteries capacity (my case 215ah/s) without significantly reducing the duty cycle of lead acids.

Only you'll know if the reduction in capacity is a problem. Measure your actual usage and then determine if one 170ah batter is correct. I think the 170 is a different physical size then the 27.
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