What is the different between these Trojan batteries?

[paulcheung]

Hi guys,

What is the different between these two Trojan batteries? the L16P-AC and the L16RE-B? The L16P-AC is $20 cheaper than the L16RE-B and have 420 amps hour on 20 hour rate. the L16RE-B is rated 370 amps hours on 20 hour rate.

Thanks .

[Sunking]

Main difference is 4 pounds of lead, the RE has more lead. What that translates to is use or application. One is a true Deep Cycle, and one is a Hybrid which I have gone over 1000 times now 1001.

There are 3 catagoires of LA batteries. SLI (starting lighting & Ignition), Hybrid, and Deep Cycle. SlI battery plates are thin and spongy and a lot of them so by design with strong electrolyte have very low internal resistance. That gives the battery the ability supply very large discharge currents with minimum Voltage Sag specified as Cold Cranking Amps and/or Marine Cranking Amps. Down side is they suk at cycle operation and if forced into service maybe 50 to 100 cycles.

True Deep Cycle batteries like the Trojan L16RE-B plates are made with heavy thick plates which last a long time compared to SLI. Coupled with slightly less acidic electrolyte Deep Cycles has a higher internal resistance and limits maximum sustained discharge and charge rates to C/8 for FLA and C/4 for AGM. Upside is some higher end Deep Cycles can provide you roughly up to 1500 to 1700 cycles to 30% daily DOD and recharge at 50% or 7 years whichever comes first.

The Hybrid like a Trojan L16P-AC is a cross between a SLI and Deep Cycle. It has thicker heavier plates than SLI, but not as much as Deep Cycle. Tries to be both, but falls short in any extreme. It can do high current applications like cranking motors, powering a golf cart, trolling motor, floor machine, RV house battery, but with more Sag than SLI, but not as much as a Deep Cycle.

OK now to answer your question. The RE is a Deep Cycle with Carbon Technology. It has 4 pounds more lead in it. The Smart Carbon is advertised to extend the battery life by improving PSOC and is used in Trojan's RE and Industrial line up. So if you want the best 6 volt battery for cycling look at the Industrial line.

The L16P-AC is a hybrid better suited to golf carts, EV's, Floor Machines, and RV's who demand high current applications. Will not last as long as the RE which is reflected in warranty it is not to be ruled out if your application demands either high discharge or charge currents or both. Just understand that with this manufacture and all others you sacrifice cycle life.

[paulcheung]

Got it, thank you

[hammick]

I found this doing some research as I need to choose between the L16 Signature and the Premium L16RE-B. I did see from the renewable energy brochure that the L16H-AC is in their Signature line even though it's classified under the AC line. Not sure what AC stands for.

They L16RE-B according to specs is slightly larger than the L16H-AC but it weights seven pounds less. The L16H-AC is 435ah and the L16RE-B is 370ah. Boy my gut sure tells me to buy the 435ah L16H.

Sunking where did you get your info that the L16RE-B has four more pounds of lead?

http://www.trojanbattery.com/pdf/TrojanBattery_RE_brochure.pdf

"Both the Premium "RE" versions L16RE-A and L16RE-B, and, the Signature L16P &
L16H are great deep-cycles lead acid batteries for solar applications. The key
differences between them are:
The grid is thicker for the Premium "RE" L16RE-A and L16RE-B, which effectively
reinforces further the frame strength which results into a greater corrosion
resistance;
There is relatively more electrolyte in contact with the plates in the Premium
"RE" L16RE-A and L16REB, which enhances the electrochemical reaction,
particularly during PSOC;
The rubber-based multi-rib geometry separator is approx. 30% thicker for the
Premium "RE" L16RE-A and L16RE-B, which translates into a longer life of the
separator. The thicker multi-ribs geometry keeps over time the acid channels
open longer, promoting the flow of the electrolyte . As a result, the thicker
separator is reducing the risk of stratification and enhancing electrochemical
processing throughout the plates, resulting into longer continuous performance
of the battery.
In the approx. same form factor (except the height), this results into more
lead per Ah capacity on the L16-RE units nameplate.
As a consequence, the cycling performances of the Premium "RE" is 1,600 cycles
@ 50% DOD and 4,000 cycles @ 20% DOD. Respectively 1,200 cycles # 50% DOD, and,
3,000 cycles @ 20% DOD @ 20% DOD, for the L16-P & L16-H.
I hope this helps. Let me know if I can shed further light on other attributes
of lead acid batteries.
Sunniest regards,
John
John F. DeBoever
Global Technical & Projects Director - Renewable Energy
Trojan Battery Company
12380 Clark Street
Santa Fe Springs, CA 90670
Tel: +1-562-236-3000 Ext. 3139
Cell: +1-845-514-7600 - NY office time zone: USA EST (GMT-5)
Skype: john.f.deboever
Fax: +1-562-236-3239
jdeboe...@trojanbattery.com<mailto:jdeboe...@troja nbattery.com>
www.trojanbattery.com<http://www.trojanbattery.com/>"

[inetdog]

The description from the Trojan engineer tells you the critical differences, but it hides them behind a lot of other words and abbreviations.

The AC battery is designed for "Floor machines" which will be charged fully after each shift before being used again. This means that they will not sit around at a partial state of charge (PSOC) for any length of time and sulfation will not be as large a performance factor.
They also will not be subject to high current loads for the most part.
The RE batteries are designed to be discharged and recharged on a roughly 24 hour cycle, with the chance of not being fully charged for several days in a row. (PSOC operation).
And they may be called upon to deliver high currents to inverters for supplying short term loads and high starting surges.
The RE batteries may well last longer even though the higher capacity of the others means that you will be stopping at a lower percentage of discharge on each cycle.

In the absence of real world information, I would go with the RE myself. The AC construction is a new design which has not been time tested in solar PV applications yet.

[paulcheung]

For Solar RE applications, Take the RE version, I wish I had got those instead the one I have now.
Take a look at this link.

http://www.solarpaneltalk.com/showthread.php?23438-Trojans-Smart-Carbon-Technology

[hammick]

I guess thinking about this further the L16RE-B has more weight per AH. Too bad they don't make it in a 435ah.

The T-105RE weighs five more pounds than the T-105 and both are 225ah.