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Using NOCO G7200 to desulfate a pair of T-105's

rjsurfer
Explorer
Explorer
I'm on a camping trip and my buddy who's travelling with us has a NOCO G-7200 charger and said I could borrow it to desulfate my three year old T-105's, total 4 batteries.

According to the manual it takes 4 hours for the procedure for a single 12 volt flooded battery.

I'll do them a pair at a time so I'm thinking I should let it run for 8 hours per pair ????

Just curious if that's the way to go.

Ron W.
03 Dodge 2500 SRW,SB,EC
2018 Keystone 25RES
DRZ-400SM
DL-650
12 REPLIES 12

red31
Explorer
Explorer
1.5A charger 'repair' mode !

westend
Explorer
Explorer
To answer some comments these batteries where fully charged before starting, I have been on full hook-ups the last 5 days.


Were you charging the T-105's at the specified voltage of 14.8 V? What was the specific gravity measurement?
'03 F-250 4x4 CC
'71 Starcraft Wanderstar -- The Cowboy/Hilton

rjsurfer
Explorer
Explorer
Op back.....

Well I finished the first pair of batteries (3hrs) and didn't notice much difference in before/after specific gravity and resting voltage. I failed to monitor the current going in, something I'll check on the second set. Again voltage never went higher than 14.6v.

I did monitor the battery temperature and there was only a 2 degree increase from the second pair which was sitting idle at the time. There was active bubbling but no loss of water.

To answer some comments these batteries where fully charged before starting, I have been on full hook-ups the last 5 days.

Ron W
03 Dodge 2500 SRW,SB,EC
2018 Keystone 25RES
DRZ-400SM
DL-650

landyacht318
Explorer
Explorer
Got to get the batteries to full before initiating an attemptedf EQ charge.

I don't think a 7 amp charger can get 232Ah of trojan batteries to 16v.

My previous flooded group 31, after a normal full recharge, would require 6.2 amps to be brought to 16volts, and by the tiem specific gravity had maxed out it was accepting 3.8 to 4.2 amps at 16 volts. So I do not see 7 amps of charger being able to bring 100Ah more capacity to 16v, ever.

I thinks the desulfation 'Pulses', are marketing mumbo jumbo to separate consumers from their money and give them the warm and fuzzies.

If pulse desulfation worked, no Charging source would NOt employ it, and battery longevity would easily be extended. Only failure modes would be from plate shedding if it actually worked.

pianotuna
Nomad III
Nomad III
Fully charge the batteries first. Pulse mode--no one really knows if this works. It may not hurt to pulse charge.
Regards, Don
My ride is a 28 foot Class C, 256 watts solar, 556 amp-hours of Telcom jars, 3000 watt Magnum hybrid inverter, Sola Basic Autoformer, Microair Easy Start.

time2roll
Nomad
Nomad
rjsurfer wrote:
Well I tried running the desulfate mode on one disconnected pair and I'm only reading 14.6 volts at the battery pair so that's not right.
When did you measure?
Need initial voltage and at each hour to determine where it is headed.

Yes you need a full charge cycle completed before equalize. Best to do this when plugged in.

SoundGuy
Explorer
Explorer
rjsurfer wrote:
Well I tried running the desulfate mode on one disconnected pair and I'm only reading 14.6 volts at the battery pair so that's not right.


And did you first read the instructions regarding this 16v Boost Mode?

CAUTION. USE THIS MODE WITH CARE.

THIS MODE USES A HIGH VOLTAGE AND MAY CAUSE SOME WATER LOSS IN WET (FLOODED) CELL BATTERIES. BE ADVISED, SOME BATTERIES AND ELECTRONICS MAY BE SENSITIVE TO HIGH CHARGING VOLTAGES. FOR OPTIMAL RESULTS, TAKE THE BATTERY THROUGH A FULL CHARGE CYCLE, BRINGING THE BATTERY TO FULL CHARGE, BEFORE USING THIS MODE. TO MINIMIZE RISKS TO ELECTRONICS, DISCONNECT THE BATTERY BEFORE USING THIS MODE.


The timing of your posts suggests perhaps not. :@
2012 Silverado 1500 Crew Cab
2014 Coachmen Freedom Express 192RBS
2003 Fleetwood Yuma * 2008 K-Z Spree 240BH-LX
2007 TrailCruiser C21RBH * 2000 Fleetwood Santa Fe
1998 Jayco 10UD * 1969 Coleman CT380

MrWizard
Moderator
Moderator
I suspect that if the batteries are accepting charge current during this process
It won't reach 16v until the end of the cycle
I can explain it to you.
But I Can Not understand it for you !

....

Connected using T-Mobile Home internet and Visible Phone service
1997 F53 Bounder 36s

rjsurfer
Explorer
Explorer
Well I tried running the desulfate mode on one disconnected pair and I'm only reading 14.6 volts at the battery pair so that's not right.

Unless my meter isn't picking up the 16.2 pulses that the NOCO is supplying.

Will call them on Tuesday.

Ron W
03 Dodge 2500 SRW,SB,EC
2018 Keystone 25RES
DRZ-400SM
DL-650

SoundGuy
Explorer
Explorer
rjsurfer wrote:
I'm on a camping trip and my buddy who's travelling with us has a NOCO G-7200 charger and said I could borrow it to desulfate my three year old T-105's, total 4 batteries.

According to the manual it takes 4 hours for the procedure for a single 12 volt flooded battery.

I'll do them a pair at a time so I'm thinking I should let it run for 8 hours per pair ????

Just curious if that's the way to go.


The G7200 Owner's Manual suggests this 16v Boost Mode is an automatic process, in which case I'd just let it run it's course. The manual further states - "The G7200 can be used on battery sizes from 14 to 230Ah @ 12 vdc ... " ... that by definition limits charging to just two 6 volt GC-2's at any given time. In any case, 16 volts is awfully high for the trailer itself so I'd make sure the batteries are disconnected from the trailer before beginning the process.
2012 Silverado 1500 Crew Cab
2014 Coachmen Freedom Express 192RBS
2003 Fleetwood Yuma * 2008 K-Z Spree 240BH-LX
2007 TrailCruiser C21RBH * 2000 Fleetwood Santa Fe
1998 Jayco 10UD * 1969 Coleman CT380

pianotuna
Nomad III
Nomad III
Do one pair at a time. Read the manual for charge times. Four hours may not be enough.
Regards, Don
My ride is a 28 foot Class C, 256 watts solar, 556 amp-hours of Telcom jars, 3000 watt Magnum hybrid inverter, Sola Basic Autoformer, Microair Easy Start.

theoldwizard1
Explorer
Explorer
It has been discussed before, but Trojan recommends higher than "average" charging voltages. The only way you will achieve them is an adjustable charger/power supply.