[RE-wrenches] AGM recommendations?

Mon Sep 23 18:23:28 PDT 2024

I have recently been installing lead carbon VRLA batteries and they have some nice characteristics over conventional AGM's such as rapid charge and ’allegedly’ significantly reduced sulphation. I have generally avoided VRLA and recently had a client toast a $15k set of Rolls (sulphation) in a very short time due to incorrect charge settings. This is a Canadian distributor but similar batteries may be available in the U.S.

https://hubpower.ca/wp-content/uploads/2024/01/HC6-420-Spec-Sheet.pdf
HC6-420-Spec-Sheet
PDF Document · 378 KB

Ron

> On Sep 23, 2024, at 3:36 PM, jay via RE-wrenches <re-wrenches at lists.re-wrenches.org> wrote:
> 
> HI All,
> 
> You’ve all obviously had people take way better care of their VRLA batteries than I have.  And it seems as though VRLA and FLA are both not lasting as long as they used to for reasons I don’t understand. 
> 
> When I hear someone say yeah I want VRLA for my rental, I can only say no way would I do that. But maybe you’ve got really really good renters. 
> My experience with renters is they are really good at killing batteries.  The last renter we had, after he killed the batteries through neglect, we told him he had to replace them, and he did.  Then it was great as I didn’t care what he did.  
> 
> At this point with the cost of LFP vs VRLA and cycle life, availability  etc and all that, LFP is the clear winner for me. With the exception of sub freezing temperatures. 
> 
> Just my 2 cents
> 
> jay
> 
>  
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
>> On Sep 23, 2024, at 9:23 AM, Maverick Brown via RE-wrenches <re-wrenches at lists.re-wrenches.org <mailto:re-wrenches at lists.re-wrenches.org>> wrote:
>> 
>> David
>> 
>> I have installed hundreds of Concorde AGMs and about same quantity of FullRiver AGMs. About 225 off grid systems using 12 or 24 AGMs in each system depending on need. 
>> 
>> Concorde offers a 2V 900Ah and 6V 300Ah “tall golf car” battery. And they have an L-16 size as well similar to FullRiver. 
>> 
>> FullRiver offers a 6V 400Ah and 2V 1150Ah L-16 size. 
>> 
>> I personally own 24 each FullRiver 6V 400Ah bank (48V nominal) for my main house backup (installed since 2017, Outback Radian). 
>> 
>> And I have 24 2V 1200Ah Concorde AGMs in a rental. (48V, XW6048). 
>> 
>> I have a broker / supplier for both (same guy). I’ll text his contact. 
>> 
>> Thank you,
>> 
>> Maverick
>> 
>> Maverick Brown
>> Off-Grid Solar Commander since 2006
>> Maverick Solar Enterprises, Inc.
>>  • Solar Commander Remote Power
>>  • SunFlow Systems Cathodic Protection 
>> maverick at mavericksolar.com <mailto:maverick at mavericksolar.com>
>> 512-460-9825
>> 
>> 
>> 
>>> On Sep 23, 2024, at 7:20 AM, David Palumbo via RE-wrenches <re-wrenches at lists.re-wrenches.org <mailto:re-wrenches at lists.re-wrenches.org>> wrote:
>>> 
>>> 
>>> Wrenches,
>>> 
>>> I have decided that AGM batteries would be best for a rental house battery replacement that I own and manage.
>>> 
>>> I'm looking for a good quality brand that has AGM's that will get me up to the 900 to 1,000 AH range for my 24v system. 
>>> 
>>> I have not found any distributors with Surrette's that available right now. I need to install in mid-October.
>>> 
>>> What other manufacturers of AGM's should I be looking at right now?
>>> 
>>> Thanks,
>>> Dave Palumbo
>>> Hyde Park, VT
>>> 802-371-8678 text or voice
>>> _______________________________________________
>>> List sponsored by Redwood Alliance
>>> 
>>> Pay optional member dues here: http://re-wrenches.org <http://re-wrenches.org/>
>>> 
>>> List Address: RE-wrenches at lists.re-wrenches.org <mailto:RE-wrenches at lists.re-wrenches.org>
>>> 
>>> Change listserver email address & settings:
>>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>>> 
>>> There are two list archives for searching. When one doesn't work, try the other:
>>> https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/
>>> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
>>> 
>>> List rules & etiquette:
>>> http://www.re-wrenches.org/etiquette.htm
>>> 
>>> Check out or update participant bios:
>>> http://www.members.re-wrenches.org <http://www.members.re-wrenches.org/>
>>> 
>> _______________________________________________
>> List sponsored by Redwood Alliance
>> 
>> Pay optional member dues here: http://re-wrenches.org <http://re-wrenches.org/>
>> 
>> List Address: RE-wrenches at lists.re-wrenches.org <mailto:RE-wrenches at lists.re-wrenches.org>
>> 
>> Change listserver email address & settings:
>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>> 
>> There are two list archives for searching. When one doesn't work, try the other:
>> https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/
>> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
>> 
>> List rules & etiquette:
>> http://www.re-wrenches.org/etiquette.htm
>> 
>> Check out or update participant bios:
>> http://www.members.re-wrenches.org
>> 
> 
> _______________________________________________
> List sponsored by Redwood Alliance
> 
> Pay optional member dues here: http://re-wrenches.org
> 
> List Address: RE-wrenches at lists.re-wrenches.org
> 
> Change listserver email address & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
> 
> There are two list archives for searching. When one doesn't work, try the other:
> https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/
> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
> 
> List rules & etiquette:
> http://www.re-wrenches.org/etiquette.htm
> 
> Check out or update participant bios:
> http://www.members.re-wrenches.org
> 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20240923/01f555d6/attachment-0001.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: preview.png
Type: image/png
Size: 140108 bytes
Desc: not available
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20240923/01f555d6/attachment-0001.png>