The total number of various models of converters discussed is mind-numbing. Partially "yes", conditionally, and riddled with caveats, make answers virtually unintelligible.Here is a single simple question in enquiry...Does a single model of smart converter exist that the consumer can set absorbsion voltage limit valueANDLength of time spent at absorbsion limit before defaulting to float voltage? Like 30 minutes...one hour...three hours...?Can have dingle dongle control. Doesn't matter. Adjustable Absorbsion voltage limit PLUS time spent at voltage limit max is what I am looking for. Preferably in an 80-100 ampere device.Thank You

My Magnum could do what you want--but it costs a pretty penny.

I don't know of one.You can get what you want by using a solar controller with those adjustables as the converter.(with a DC power supply input) To keep the price down in the 80 amp range where controllers are very expensive, you would get two lower cost 40 ampers and put them in parallel on the battery.EP Solar has their standard automatic two-hour time at Vabs once it gets the batts to the not adjustable Vabs (14.6ish). You can get their gizmo to adjust those things, adding to the price.

The answer therefore is "NYET"Because of current hogging I never parallel power dividing devices. And three grand for a battery charger is a little ripe.The obvious answer is to suggest no "press a button go have a martini types" would be to spend an insane amount of money for lithium batteries because they don't care."You can't get there from here" is disheartening. Meanwhile it's back to adjustable power supplies with adjustable timers.Thanks folks, this was a serious question and you answered it :)

Another way? Have two converters, one being a 100 amper adjustable voltage, and the other being a lower amp adjustable.Put both on the battery bank with the 100 amper set to your chosen Vabs and your oft-recommended external timer on the 120v input. (You have to figure how long it will take to get the batts to Vabs and then add your Vabs time to get the total timer run time.)You set the second converter to your chosen float voltage, no timer. This will be doing nothing while the higher voltage one is running, but will "come on" as though automatically, when the first one stops so you don't have to be there. The amps size of this one can be very low, more like a battery maintainer size.

MEXICOWANDERER wrote:Does a single model of smart converter exist that the consumer can set absorbsion voltage limit valueANDLength of time spent at absorbsion limit before defaulting to float Preferably in an 80-100 ampere device.Yes! It's a Prosine 2.0, and as a bonus it has PFC, and will limit its input power draw for use with a small generator. Of course, there are a few catches:1) You have to take an inverter you might not want.2) Its reliability record is poor.3) The cooling fan runs a lot even with zero load.4) It's pretty large physically.If somebody would build this without the inverter and good reliability, it would IMO be hands-down the best RV power converter.

Newer Converter Synopsis Summary | Good Sam Community

theoldwizard1
Explorer II
Aug 15, 2018
I have looked and never found a converter or even a stand alone charger that allows you to "adjust" ANY lead acid battery charging voltages.
GordonThree
Explorer
Aug 16, 2018
Most definitely not going to find them in modern consumer grade gear. The ability to adjust things more than likely means Joe consumer will adjust incorrectly and then injure himself or someone else. Either that or cause property damage, and either way, try to hold the manufacturer responsible.
pianotuna
Nomad III
Aug 16, 2018
GordonThree,

I blame apple for the dumbing down of our controls. And consumer reviews seem to be written at about a grade 5 level.
BFL13
Explorer II
Aug 16, 2018
theoldwizard1 wrote:
I have looked and never found a converter or even a stand alone charger that allows you to "adjust" ANY lead acid battery charging voltages.

Then you haven't looked very far. I have had one since 2012 and have been posting about it ever since. (See photo from early 2013 eg. It is a 100 amper ADJ being powered by my Honda 3000 in the truck)

What Mex wants is one of those except with an adjustable timer for staying at Vabs too. (For set and forget I suppose) THAT is not (yet?) available in converters.

I don't need the timer. I have to stop the gen according to park gen time rules. On shore power that is not an issue. Mex is on shore power sort of.
BFL13
Explorer II
Aug 16, 2018
GordonThree wrote:
Most definitely not going to find them in modern consumer grade gear. The ability to adjust things more than likely means Joe consumer will adjust incorrectly and then injure himself or someone else. Either that or cause property damage, and either way, try to hold the manufacturer responsible.

They are out there now in adjustable voltages. Just no adjustable timers with that, like Mex wants. All the "LKs" have the adjustable voltage option as well as the standard automatic three or four stage option. It is the new thing! (Well, new since 2016)

http://powermaxconverters.com/products/
GordonThree
Explorer
Aug 16, 2018
Like Don said earlier, my Magnum ticks all the boxes and then some. Not as inexpensive as a stand alone converter, but also offers more features.

I used to have charging termination set to use the columb counter but have recently switched to timer based to see if there's any difference in available AH before hitting 50% SoC. Vabs is set to twelve hours and is centered at 14.4v but auto adjusts based on battery temperature.
BFL13
Explorer II
Aug 16, 2018
Was it not the Magnum that has those issues between what its display reads and what its remote display reads so you get 80 amps instead of 100? If not Magnum, which one was that?
pianotuna
Nomad III
Aug 16, 2018
Hi BFL13,

The Magnum can be used without a shunt. When it is set up to do that it reads the "head" amperage. That is not as accurate as a shunt based system.

Forum Discussion

Newer Converter Synopsis Summary

About Technical Issues

Related Content

LiFePO4 Converter Change?

Replacement catalytic converter

How to test Converter voltage

Stolen Catalytic Converter

Trip Summary