Trojan t-1275 vs Signature series J150 RE
Before winter, I need to get a dedicated flooded house battery, my Northstar AGM-27 has been working hard as both house and engine battery for the last 4 months, and I want to return it to engine star...
Forum Discussion
When I was looking to replace the T125's in our trailer I looked at the Trojan RE (renewable energy) batteries vs. the std T125 etc. After lots of digging and digesting data here is what I concluded.
1) When comparing a std to RE Trojan I found that the rated AH for the equivalent RE battery was slightly lower. For example the T125RE had an AH rating closer to the T105. I seem to recall also that the RE had a slightly lower SG as well. The L-16's were similar
My conclusion was that they traded off AH to increase cycle life.
In the end I figured that even though we dry camp a lot, I was hardly going to come close to the std cell rated cycle life in 5 years so that is what I ended up with.
And then I asked Trojan how they defined cyclelife. Here is their response
now the big questions are:
1)ok, this defines end of life. but under what discharge rate and charge rate?
2) at what % of original capacity would you say your battery(s) are no longer adequate and at end of life.
For me, 50% would be past what I consider useable life. probably something closer to 70% maybe 60%.
1) When comparing a std to RE Trojan I found that the rated AH for the equivalent RE battery was slightly lower. For example the T125RE had an AH rating closer to the T105. I seem to recall also that the RE had a slightly lower SG as well. The L-16's were similar
My conclusion was that they traded off AH to increase cycle life.
In the end I figured that even though we dry camp a lot, I was hardly going to come close to the std cell rated cycle life in 5 years so that is what I ended up with.
And then I asked Trojan how they defined cyclelife. Here is their response
As far as end of life, the battery industry standard is that a battery has reached end of life when it fails to provide 50% of it's rated capacity.
now the big questions are:
1)ok, this defines end of life. but under what discharge rate and charge rate?
2) at what % of original capacity would you say your battery(s) are no longer adequate and at end of life.
For me, 50% would be past what I consider useable life. probably something closer to 70% maybe 60%.
