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01-14-2017, 04:44 PM
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#1
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Junior Member
Join Date: Jan 2017
Location: Kingman
Posts: 27
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Group 27 Battery
My 2017 GrayHawk came with a Group 27SRM Interstate House Battery that won't take a charge. I was looking on the Interstate Battery web site and saw that the group 29SRM battery is only 1/4" longer and 1/2" taller so I believe it will fit the tray ok. The spec.'s are better for the 29 and I think I will pay the difference in price and upgrade to the 29.
Does anybody know of any reason why I shouldn't do this?
SSGCharlie
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01-14-2017, 04:53 PM
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#2
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Senior Member
Join Date: Mar 2015
Location: Port Orchard
Posts: 2,065
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No reason why not. I plan to upgrade and add another group 31 in the compartment aft of the current battery compartment.
__________________
Don
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01-14-2017, 05:17 PM
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#3
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Junior Member
Join Date: Jan 2017
Location: Kingman
Posts: 27
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Thanks I thought it would be all right but was not sure.
SSGCharlie
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01-15-2017, 12:37 PM
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#4
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Lost in the Woods
Join Date: Apr 2016
Location: Ontario Canada
Posts: 256
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Why not add another battery box and run 2 batteries, then you can use 2 6volt batteries in series. This will give you a lot more capacity than running 2 12 volts in parallel.
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01-15-2017, 03:21 PM
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#5
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Junior Member
Join Date: Jan 2017
Location: Kingman
Posts: 27
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I only want to run one battery that's why since I have to replace the 27 SRM battery I think it would be better to go to the 29 SRM.
SSGCharlie
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01-15-2017, 04:33 PM
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#6
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Senior Member
Join Date: Jan 2016
Location: Beacon
Posts: 339
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Quote:
Originally Posted by SSGCharlie
I only want to run one battery that's why since I have to replace the 27 SRM battery I think it would be better to go to the 29 SRM.
SSGCharlie
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Charlie, like you, I only want to run with one battery. I had an SRM-24 Interstate battery and it was okay, but because it's a combo battery with high cold cranking amps, you cant discharge it below 50% without seriously beginning to shorten its life. This means that only 41 amp hours are actually available. And it seemed to be a rapidly discharging battery, even with no dry camping, properly topped off cells, a battery cut-off switch, indoor winter storage on a maintainer, etc. From my limited experience, as well as from what I've read, combo batteries just aren't the best house batteries.
I recently upgraded to this 100 amp hour Group 27 SLA/AGM battery. I haven't camped with it yet but the reviews on Amazon and elsewhere seem solid and I received it in perfect condition with free shipping for just $160. If it performs as expected, I'll have a battery that should last several seasons, can provide up to 80 amp hours without damage (double my Interstate battery), works well with solar setups, is maintenance free, spill-proof, can be mounted in any position, and doesn't off-gas when charging. And at 60 lbs it's just 14 lbs more than my last house battery (which is good because I'm a little tight on tongue weight).
Anyway, thought you might want to consider it or something like it. Pricing is comparable to the Group 29 you're considering. Good luck with whatever you decided to get!
__________________
2017 White Hawk 28DSBH, Glacier package
2010 F150 XLT SCREW, 4x4, 5.4L Triton, HD Tow
Andersen No-Sway Weight Distribution Hitch
Our White Hawk photo album
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01-15-2017, 05:51 PM
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#7
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Junior Member
Join Date: Jan 2017
Location: Kingman
Posts: 27
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Mikey, Thanks for the reply, very interesting. The 27SRM battery that I have now should be replaced at no charge (I Hope). I have only had my GrayHawk since Dec. 6th I was hoping I would only have to pay the difference between the batteries.
SSGCharlie
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01-15-2017, 06:49 PM
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#8
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Senior Member
Join Date: Jan 2016
Location: Beacon
Posts: 339
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Quote:
Originally Posted by SSGCharlie
Mikey, Thanks for the reply, very interesting. The 27SRM battery that I have now should be replaced at no charge (I Hope). I have only had my GrayHawk since Dec. 6th I was hoping I would only have to pay the difference between the batteries.
SSGCharlie
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Aha! Well, being under warranty changes things. Good luck with the new battery.
__________________
2017 White Hawk 28DSBH, Glacier package
2010 F150 XLT SCREW, 4x4, 5.4L Triton, HD Tow
Andersen No-Sway Weight Distribution Hitch
Our White Hawk photo album
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01-15-2017, 10:54 PM
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#9
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Senior Member
Join Date: May 2016
Location: San Antonio
Posts: 181
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Quote:
Originally Posted by SSGCharlie
Mikey, Thanks for the reply, very interesting. The 27SRM battery that I have now should be replaced at no charge (I Hope). I have only had my GrayHawk since Dec. 6th I was hoping I would only have to pay the difference between the batteries.
SSGCharlie
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I was about to say...shouldn't it be replaced under warranty? Looks like you've got it covered either way. If it were me, I'd use the warranty replacement battery until it wore out and then switch to the upgraded battery. Of course, I don't do a lot (as in none) of dry camping and my battery is only used when we're on the road between stops. It's nice to have a larger battery, but my thinking was that I'm paying extra for something I'll likely never need. Of course, I may change my mind if the zombie apocalypse comes or the truck breaks down in the middle of nowhere....
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09-12-2018, 12:43 PM
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#10
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Junior Member
Join Date: Jun 2017
Location: Central
Posts: 3
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I am curious as to how these batteries are holding up? I am considering them also.
Quote:
Originally Posted by Mikey
Charlie, like you, I only want to run with one battery. I had an SRM-24 Interstate battery and it was okay, but because it's a combo battery with high cold cranking amps, you cant discharge it below 50% without seriously beginning to shorten its life. This means that only 41 amp hours are actually available. And it seemed to be a rapidly discharging battery, even with no dry camping, properly topped off cells, a battery cut-off switch, indoor winter storage on a maintainer, etc. From my limited experience, as well as from what I've read, combo batteries just aren't the best house batteries.
I recently upgraded to this 100 amp hour Group 27 SLA/AGM battery. I haven't camped with it yet but the reviews on Amazon and elsewhere seem solid and I received it in perfect condition with free shipping for just $160. If it performs as expected, I'll have a battery that should last several seasons, can provide up to 80 amp hours without damage (double my Interstate battery), works well with solar setups, is maintenance free, spill-proof, can be mounted in any position, and doesn't off-gas when charging. And at 60 lbs it's just 14 lbs more than my last house battery (which is good because I'm a little tight on tongue weight).
Anyway, thought you might want to consider it or something like it. Pricing is comparable to the Group 29 you're considering. Good luck with whatever you decided to get! |
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09-12-2018, 01:45 PM
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#11
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Site Team
Join Date: Nov 2012
Location: Clearwater, FL area
Posts: 5,196
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Quote:
Originally Posted by Mikey
I recently upgraded to this 100 amp hour Group 27 SLA/AGM battery.
I haven't camped with it yet but the reviews on Amazon and elsewhere seem solid and I received it in perfect condition with free shipping for just $160. If it performs as expected, I'll have a battery that should last several seasons, can provide up to 80 amp hours without damage (double my Interstate battery), |
With a 100Ah battery, going by the 50% rule you only have 50Ah available, not 80Ah. See the chart below. If you do the 50% rule you will get more than a few years of use out of your battery.
Don
My Registry
RVing with SOLAR
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