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Old 26-07-2014, 18:30   #1
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Trojan J150

Anyone used these? I haven't seen them before and will soon be looking to replace a liveaboard bank.

This came up apparently from trojan on another forum..

Quote:
"The J150+ batteries will provide about 1200 cycles at 50% depth of discharge, 3000 cycles at 20% DOD and 700 cycles at 80% DOD. These are values we see in our lab testing which is constant temperature with ideal recharge and maintenance. Actual cycles in the field will likely be less.
Any thoughts?

J150 | Trojan Battery Company
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Old 26-07-2014, 18:50   #2
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Trojan J150

2 x Trojan t145s have more energy density per square inch vs. a single j150

.1233 amp/hours per square inch for j150

And

.151 for 2x Trojan t145

So if you have room for t145s you are better off.


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Old 26-07-2014, 21:08   #3
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Re: Trojan J150

Quote:
Originally Posted by zboss View Post
2 x Trojan t145s have more energy density per square inch vs. a single j150

.1233 amp/hours per square inch for j150

And

.151 for 2x Trojan t145

So if you have room for t145s you are better off.


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2 x j150's would give 300Ah, just enough plus using 6v's would mean it wouldn't be possible to take one at a time offline to get a really good charge, equalise or capacity test. So it's 2 x 6v banks or 2 x 12v. If I went for 6v I'd get t105's.
Ta.
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Old 26-07-2014, 22:05   #4
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Re: Trojan J150

Quote:
Originally Posted by conachair View Post
2 x j150's would give 300Ah, just enough plus using 6v's would mean it wouldn't be possible to take one at a time offline to get a really good charge, equalise or capacity test. So it's 2 x 6v banks or 2 x 12v. If I went for 6v I'd get t105's.
Ta.
I think the compelling answer to 12 volts is that you can take one off line at a time. However you did ask for opinions...

It would give you 150 amp/hours useful vs. 130 amp hours useful and occupy 46 more square inches of floor space. It sounds like you have a tight space so this is important.

It would also weigh 168 pounds vs. 144 pounds. Again, if you have a smaller floor space, I am assuming a smaller boat where every pound counts. 20pounds is a lot of food.

Of course, you could always go with a single lithium that gives you the same useful amp/hours from master volt. That would take up 103 square inches of floor space (roughly half the space of the 150s) and weigh only 68 pounds. Plus it would charge faster and last like 10 years. Of course... the price is higher!
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Old 27-07-2014, 19:50   #5
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Re: Trojan J150

Weight isn't an issue but 2 x j150's would fit in a space without having to find twice the space for 2 pairs of 6v. The 1200 cycles at 50% dod was the bit which caught my eye, could justify the extra cost as I'm probably closer to only using about 20% most of the time before recharging. I haven't seen these before, are they a new product?
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Old 27-07-2014, 21:46   #6
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Re: Trojan J150

Quote:
Originally Posted by conachair View Post
Weight isn't an issue but 2 x j150's would fit in a space without having to find twice the space for 2 pairs of 6v. The 1200 cycles at 50% dod was the bit which caught my eye, could justify the extra cost as I'm probably closer to only using about 20% most of the time before recharging. I haven't seen these before, are they a new product?


Where did you read 50% cycles? I just had a discussion with trojan about what they consider a cycle....their version of a cycle is different than my master volt battery monitor cycle.

In the trojan world a cycle is a discharge by ANY amount and then brought back to full charge.

So of you pull 1 amp out of that battery and then bring it back up to full charge , you have used one cycle. This is true for any trojan battery. Cycle count depends on battery temperature. The higher overall battery temp, each cycle counts more.

In the end you really only end up with 300 or so real 50% to 100% cycles.


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Old 27-07-2014, 22:37   #7
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Quote:
Originally Posted by zboss View Post
Where did you read 50% cycles?
........

In the end you really only end up with 300 or so real 50% to 100% cycles.
It was from an email quoted in another forum, very precise about the dod cycles....


"The J150+ batteries will provide about 1200 cycles at 50% depth of discharge, 3000 cycles at 20% DOD and 700 cycles at 80% DOD. These are values we see in our lab testing which is constant temperature with ideal recharge and maintenance. Actual cycles in the field will likely be less.*

Have a good day.

Xxxx xxxxx
Technical Support Engineer
Trojan Battery Company

4858-B Mercer University Dr.
Macon, GA 31210
Tel: (478) 845-7707
Fax: (478) 845-7701
xxxxxxxx@trojanbattery.com
www.trojanbattery.com
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