Trojan T-105 versus T-1275

[pauldub]

I'm considering using a pair of T-1275 instead of T-105 to gain some additional amp-hour capacity. Should I expect either of these choices to last for about the same number of 50% discharge/charge cycles? Also, it seems that a pair the 12v in parallel with likely have half internal resistance than a pair of 6v in series. I'm guessing the pair of 12v would do better running an inverter with a 1000 watt load.

[theoldwizard1]

Smitty77 wrote:
It's always about space, desired total AH's, need for faster recharge - or not, and of course - budget!

A pair of T1275s will cost a LOT more than a pair of T105s ! Availability maybe an issue unless you have a big golf cart distributor nearby.

[pianotuna]

Hi Smitty,

The T-1275 has been around for at least ten years.

[BFL13]

Ok it is happening again! It says there are 3 replies, last at 3:47, but it is not showing on my thread. I suppose this will count as #4 and like before many times, I will never learn what #3 ever was.

Does anybody see #3 from 3:47? If so, who is it from? I want to be able to tell Forum Support enough info that they can fix this. Thanks!

[Lwiddis]

If Winnie’s battery tray on the TT tongue would have been just an inch wider, I would have installed T1275s instead of two T125s. More amp hours is always better.

[Smitty77]

I also will recommend T-1275's for some people, based upon space constraints. Besides BFL13's positive opinion of the T-1275's - I have a buddy with a Grand Banks that have a bank of these as his house batteries, (With watering system on, makes maintenance pretty dang easy!).

One thing I'm not clear on, is how long have they been available? I don't recall reading about these too far back? Is it a newer Trojan Deep Cycle offering?

It's always about space, desired total AH's, need for faster recharge - or not, and of course - budget!

Best to all,
Smitty

[BFL13]

You get 300AH with a pair of T-1275s. They gas nicely when recharging similar to the way 6s do, and unlike the hard to recharge marine/rv 12s. The T-1275s are great with inverter high amp draws for less voltage drop than Wet 6s. A pair of 105s is 225AH, so 300 will be less resistance just from that.

I had a post here about my old T-1275s if I can find it. No luck.

I got two used ones from a golf car place that were two years old at 85% according to their way of measuring things. I equalized them and nursed them back to 90% by load test at the 20hr rate for 10 hrs to 50% and used them fairly hard in the RV for five years. They finally got too low in capacity last winter, so they did really well. They held in the high 80s to near the end, then sort of died down fairly quickly.

Two new ones looked after from the start would be awesome. I now have an AGM 6GFM250, (8D format-148lbs) which acts something like the pair of T-1275s,( 82 x2 = 164lbs) so that would be another way to go perhaps.