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 > Xantrex Truecharge2 Reliability?

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jseyfert3

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Posted: 10/24/19 08:59pm Link  |  Quote  |  Print  |  Notify Moderator

Hello all,

New member here with a 2015 Rockwood 2306 that we picked up June of 2018. We're upgrading from the terrible group 24 battery to a set of two Trojan T-105 batteries. I'm looking for a suitable charger for them. As I understand, this means take to 14.4 volts (bulk), hold at 14.4 V until the current drops to small percent of capacity (absorption). At this point the battery is full, and you either switch to float at 13.5 V or stop charging entirely. Equalization is done roughly monthly for a couple of hours at 16 volts. Ideally, all stages of charging are temperature compensated as well.

Basically, the only one I've found so far that actually does a proper temp compensated charge, with a proper equalization, is the Xantrex TrueCharge2. This will charge at full current to 14.4 volts, then hold until current drops to 5% of charger rating, then to go float, if desired, at 13.5 volts. Also has equalization mode at 16 volts. Has temp equalization with battery temp sensor, or three settings via button if not.

I've read some things concerning reliability of the TrueCharge2. Anyone familiar with any reliability concerns on it? Any other temp compensated chargers that do a proper charge profile I should consider?

* This post was edited 10/24/19 09:09pm by jseyfert3 *


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BFL13

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Posted: 10/25/19 07:48am Link  |  Quote  |  Print  |  Notify Moderator

Can't say about reliability. New design of the charger. Interesting features. Very expensive!

IMO choice is automatic TC2 for twice the money as manual adjustable voltage PowerMax.. With the manual adjust, you are your own temperature compensator--Eg at 40F, I set 15.2 instead of 14.8 volts.


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time2roll

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Posted: 10/25/19 09:06am Link  |  Quote  |  Print  |  Notify Moderator

Xantrex in general has been getting a bad rep lately... at least with the inverters. I understand the TC2 runs the fan continuous and could be annoying depending on placement.

Consider a PD9260 14.8 for those GC2.

http://www.bestconverter.com/9200-148-Modified-Deck-Mount


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BFL13

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Posted: 10/25/19 09:11am Link  |  Quote  |  Print  |  Notify Moderator

time2roll wrote:

Xantrex in general has been getting a bad rep lately... at least with the inverters. I understand the TC2 runs the fan continuous and could be annoying depending on placement.


I think that is from the previous generation of Xantrex products, where people could not get technical support anymore and all that.

ISTR in the last year or so, people on here report they do get technical support and there is a new generation of products. So maybe they got a new boss or whatever.

time2roll

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Posted: 10/25/19 09:25am Link  |  Quote  |  Print  |  Notify Moderator

jseyfert3 wrote:

As I understand, this means take to 14.4 volts (bulk), hold at 14.4 V until the current drops to small percent of capacity (absorption).
Note Trojan really calls for 14.8 volt absorption. 14.4 may require more frequent equalization. And equalization at 16 volts should be done with the RV disconnected as you are above voltage spec on some control boards.

BFL13

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Posted: 10/25/19 09:42am Link  |  Quote  |  Print  |  Notify Moderator

http://www.xantrex.com/power-products/battery-chargers/truecharge-2-2.aspx

I don't understand the charging percent display. Why not just put in a straight ammeter instead of this?

If the batteries want to get down to 2 amps to be full, that is 5% of the 40 amper, but 5% of the 60 amper is 3 amps.

Also, AGMs want to get down to 0.5a/100AH so 5% of whatever isn't going to work. You want to see the actual amps, and have control over the drop to Float voltage. Auto drop at 5% would leave your AGMs undercharged every time.

jseyfert3

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Posted: 10/25/19 10:12am Link  |  Quote  |  Print  |  Notify Moderator

time2roll wrote:

jseyfert3 wrote:

As I understand, this means take to 14.4 volts (bulk), hold at 14.4 V until the current drops to small percent of capacity (absorption).
Note Trojan really calls for 14.8 volt absorption. 14.4 may require more frequent equalization. And equalization at 16 volts should be done with the RV disconnected as you are above voltage spec on some control boards.

Yeah. I actually originally had a super long post, that I really, really simplified as it was an absolute wall of text and not conducive to my main question of reliability of the TrueCharge2. In there, I stated that technically, Trojan specifies a charge current of 10-13% of C20 until the voltage is at 14.7 volts, then hold that voltage until the current drops to 1-3% of C20, then hold that current until the voltage climbs to 14.82 V. That is the Trojan specified way to charge the T-105 to my understanding, but you're going to need a really fancy charger to do that automatically or you'll need a CV/CC power supply and monitor to do it manually. The equalization should also be 16.2 volts, not 16.

I emailed Trojan about 14.4 vs 14.82 and they said it would just affect how long it took to charge the battery. Not certain how true that is one way or another.

time2roll wrote:

Xantrex in general has been getting a bad rep lately... at least with the inverters. I understand the TC2 runs the fan continuous and could be annoying depending on placement.

Consider a PD9260 14.8 for those GC2.

http://www.bestconverter.com/9200-148-Modified-Deck-Mount

Hmm. Didn't realize PD had one specifically for Trojan. Unfortunately, PD isn't temp compensated and doesn't have an equalization mode.

BFL13 wrote:

http://www.xantrex.com/power-products/battery-chargers/truecharge-2-2.aspx

I don't understand the charging percent display. Why not just put in a straight ammeter instead of this?

If the batteries want to get down to 2 amps to be full, that is 5% of the 40 amper, but 5% of the 60 amper is 3 amps.

Also, AGMs want to get down to 0.5a/100AH so 5% of whatever isn't going to work. You want to see the actual amps, and have control over the drop to Float voltage. Auto drop at 5% would leave your AGMs undercharged every time.

Yeah. This is somewhere that Xantrex got so close, yet not quite there. If you dig into it, they say that the charger can do a custom charge profile, but they only allow OEMs to program a custom charge profile. Unfortunate, as allowing the end user could do that would allow setting the complete three step charge to 14.82 V that Trojan outlines (see top of this message), set the current at which charge stops, perhaps even set max charge rate so you could have a 60 amp but only charge at 45 if you wanted. If only they sold that tool to program the charger...

jseyfert3

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Posted: 10/25/19 10:19am Link  |  Quote  |  Print  |  Notify Moderator

One thing I mentioned is I don't plan on replacing the stock converter. I plan on keeping that to power the DC while on shore power, and use automatic disconnects so it doesn't charge the batteries normally. The TrueCharge or other charger would only be used to recharge after a dry camping trip (usually after we get home), or to equalize. Depending on where we camp and what is allowed, it might also be used to recharge off a generator in the middle of a week long dry camping trip.

BFL13

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Posted: 10/25/19 10:32am Link  |  Quote  |  Print  |  Notify Moderator

For $124 you can do it all and do it right instead of not quite all, not quite right for over twice that money.

Easy to use as a portable charger by cutting the end off a set of jumper cables to clamp on with.

https://www.boatandrvaccessories.com/pro........er-converter-battery-charger-w-led-light

Two 105s can take 70 amps but a 2000w gen will struggle with that many amps so go with the 60. (That Trojan 10-13% is for when on shore power and gen time not a problem. Off-grid you do 50-90s and at max amps the batts can take and what the gen can run, whichever limit comes first)

time2roll

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Posted: 10/25/19 10:36am Link  |  Quote  |  Print  |  Notify Moderator

Yes for a temporary connection to service as needed I agree with BFL's solution.
I would not use TC2 as a portable.

With the money you save consider 200 watts solar on the roof.

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