Changing charge voltage for Odyssey battery?

[TMBRWLF]

Bingo, amp rating is the speed of charging, however voltage is what "breaks through" and allows a charge to occur. 14.4-14-8 to breakthrough and charge an AGM, 13.2-13.8 as a float voltage. That is exactly what the jeep gives my stock AGM, which I do charge every 4 months or so and just passed 2 years of age. I also use a conditioner charger every 6 months and that amazingly takes overnight to condition it back to health.

My odyssey story in my EB, is 7 years old, and shows 100% ready to rock and roll using the overpriced odyssey charger. Or is it overpriced giving me 7 years of life?

Annnd I don't think you can change the voltage of charge in a JL or any car for that matter. I'm just curious why Odyssey requires a charge different than what millions of cars give, yes AGM2 fine, but really? 14.5 volts will charge it fine.

I started using the RedArc BCDC1225 with my trucks 2nd batt (accessories) in the spring of 2018. The 2nd batt is original and 8yrs next month. These Redarc appear to be great as it's still purring and charging the O'reilly lnterstate batt that's really a start, not dual purpose/deep cycle.

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[roaniecowpony]

I inquired with Fullriver regarding whether my Victron Blue Smart 15A charger was appropriate for charging the FT750-25. They stated that it was.

 

[TMBRWLF]

I started using the RedArc BCDC1225 with my trucks 2nd batt (accessories) in the spring of 2018. The 2nd batt is original and 8yrs next month. These Redarc appear to be great as it's still purring and charging the O'reilly lnterstate batt that's really a start, not dual purpose/deep cycle.

I inquired with Fullriver regarding whether my Victron Blue Smart 15A charger was appropriate for charging the FT750-25. They stated that it was.

Interesting seeing the 12v absorption for lithium is 14.2v after talking with the EnerSys guy. I thought lithium where high voltage charge.

 

[THAW]

Appears he saying, charge at high, faster volts. I believe these TPPL are going to be interesting to run in my setup. Time will tell...

Interesting seeing the 12v absorption for lithium is 14.2v after talking with the EnerSys guy. I thought lithium where high voltage charge.

That suggestion seems off (as you have noticed). Not only is Absorption voltage often lower for Lithium, but temperature compensation is different, and it really shouldn't be Floated.

I'm guessing he meant "charge it like Lithium" as in "use high current", not as in "use a Lithium charging routine". But charging at 0.1C should still get the job done, higher current just speeds up the process (though not by all that much for a full charge because faster Bulk generally results in longer Absorption).

 

[TMBRWLF]

That suggestion seems off (as you have noticed). Not only is Absorption voltage often lower for Lithium, but temperature compensation is different, and it really shouldn't be Floated.

I'm guessing he meant "charge it like Lithium" as in "use high current", not as in "use a Lithium charging routine". But charging at 0.1C should still get the job done, higher current just speeds up the process (though not by all that much, only Bulk).

Personally I've never used lithium, so can't speak on it due to this. They have their place l reckon.

 

[KCSgtMaj]

Maybe it is the Intelligent Battery Sensor (IBS). I’m not sure how to test that. Someone here might know.

 

[KCSgtMaj]

I followed the gen 1/2 instructions.

The Gen 1/2 Genesis comes pre-wired for this configuration.

What in the Wide, Wide World of Sports is going on there?

 

[roaniecowpony]

What in the Wide, Wide World of Sports is going on there?

I think everyone that bought one of these said the same thing.

 

[zouch]

you have a "yellow top Odyssey" ?
did you perhaps mean you have a Yellow Top Optima?

I think the “AGM2” charging mode may just be a marketing ploy for Odyssey branded chargers. The Odyssey branded chargers do not show a diagram or information for different phases, unlike other chargers made by CTEK. I am guessing the only difference between AGM and AGM2 charging options would be a lower voltage desulIfation phase or elimination of the desulfation phase that runs at 15.8V for a maximum of 8hrs. This phase only runs if sulfation is detected.

I have the 94R H7 yellow top Odyssey and use the CTEK MXS 5.0 charger, a 4.3A trickle charger with an AGM option. I attach it whenever I park the Jeep in the garage, and have never had any issues with it keeping a proper charge. This charger has 8 possible charging phases:

The ripple and back current specifications are exactly the same for the 4.3V CTEK S 5.0 and 15V Odyssey OBC 15A chargers:

The difference would be that the lower voltage charger would not be sufficient to restore a significantly depleted battery and it will take a bit longer to fully charge a battery being maintained.

 

[Jebiruph]

For those interested, the TB6000Pro has a programmable charging mode. I haven't tried it yet, but here's what it looks like. I was made aware of it from this post https://www.jeepgladiatorforum.com/...st-and-charge-with-tb6000.102668/post-1643546

 

[Gorpf]

you have a "yellow top Odyssey" ?
did you perhaps mean you have a Yellow Top Optima?

Yes, yellow top Optima. Edit made. Thanks.

 

[THAW]

To be clear, SOC percentage estimates, whether coming from JScan or a consumer device, are too loose to be of importance in solving battery and charging issues.

To reclarify:

Smart shunts - though their calibration can drift - are generally more accurate than Open Circuit Voltage for assessing battery condition and health.

Calibrated voltmeters are accurate instruments, however, translating OCV to AGM battery condition using imprecise thresholds is only moderately accurate - and can be unreliable.

Simple example:
A multimeter shows 12.84 Volts when connected to a rested AGM battery. Fully charged, right? Or, maybe 12.92 Volts is 100% charged for that particular battery. Who knows? Well, a smart shunt does, because it continually tracks charge/load current and temperature, in addition to voltage. It knows whether the charger routine achieved end-stage tail current at proper voltage, and knows if and how much the battery has discharged since.

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