Added a new battery monitor...(Aili)
Battery Monitor == Fun! Plus: How to avoid a common mistake regarding AH total I have a couple 2015 Thor Majestic 28a RVs. I added a 2nd 12v battery to the coach (they only came with one). My ba...
Forum Discussion
BFL13 wrote:
Don't know which Walmart battery the OP has.
I have an Interstate SRM-29 (as marked on it) that has the same specs, size and weight as the SRM-31 seen on-line. Mine is 60 lbs on bathroom scale, marked 675, 845, and that 210, but no AH shown.
This one on-line seems to be the same specs as my SRM-29
https://www.dickssportinggoods.com/p/interstate-batteries-srm-31-marine-rv-deep-cycle-battery-19pfbuntrstt31dcbfel/19pfbuntrstt31dcbfel
It has 210 minutes RC and says here it is 98AH (but they have another 31 T-something that is given as having 130AH. Strange.)
My old Walmart marine/rv 27DC had 180 min RC and was marked 120AH, but that turned out to be the 1 amp, not the 20 hr rate.
I doubt that the OP's Walmart "122ah" batts are more AH at the 20 hr rate than the 31 above at 98AH, but who knows unless the OP tells us what he has there?
The two 12v batteries I have in my RV are these:
https://www.walmart.com/ip/EverStart-Lead-Acid-Marine-RV-Deep-Cycle-Battery-Group-Size-29DC-12V-845-MCA/20531543
It states "122AH", but honestly I don't have a good understanding of what they are actually measuring to come up with that. I suspect it's a bit of marketing liberty they are taking to pull in those of us who don't know any better (lol...).
I do find them to be a good value though, no? Especially if I install some solar so that they are almost always getting charged back up to 100%. I've used them for the last 3 years on a couple different RVs and haven't really noticed any negative effect.
Question: If you had these batteries, what would YOU consider the AH rating to be (...as it pertains to programming your Aili or equivalent battery monitor)? The Aili battery monitor I have required that I "tell it" how large my battery bank is in amp-hours. From there it can constantly display what my battery % is (...kind of like a fuel gauge for your batteries). I'm guessing I will be okay if I go with 200AH as my battery bank capacity. That way, it will hit 50% after 100 amp hours and I (or whoever is using my RV) will know that it's time to charge the batteries.
Thanks!
Chris
