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Old 09-25-2013, 09:42 AM   #1
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Desulphating battery charger and converter

If I plug in an external 1.5 amp desulphating battery charger on my house battery, will it play nice with the converter, or is there a possibility that the pulsing/desulphating/whatever it is process could damage it? The options are to have the external charger on and (a) leave the TT plugged in so both the external charger and converter are charging the battery, (b) unplug the TT so only the external charger is working, or (c) flip the battery disconnect so that the battery is totally isolated from the converter. I want to desulphate the battery, but not damage my converter in the process.

Thoughts?
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Old 09-25-2013, 10:02 AM   #2
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I always disconnect my battery when its on the external charger. I don't know for a fact that it would cause a problem to have the converter going to the battery at the same time, but figured why find out? Seems like if you invested in the better charger, just isolate the battery from the converter.
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Old 09-25-2013, 10:37 AM   #3
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Quote:
Originally Posted by Taranwanderer View Post
If I plug in an external 1.5 amp desulphating battery charger on my house battery, will it play nice with the converter, or is there a possibility that the pulsing/desulphating/whatever it is process could damage it? The options are to have the external charger on and (a) leave the TT plugged in so both the external charger and converter are charging the battery, (b) unplug the TT so only the external charger is working, or (c) flip the battery disconnect so that the battery is totally isolated from the converter. I want to desulphate the battery, but not damage my converter in the process.

Thoughts?

If you have the unit plugged in to 110v, do not put an external charger on it. The converter will charge it just fine. IF the batt voltage level does not drop to far, you will not have to worry about desulphating your batt.

Isolate the batt if you want to do desulphating with the charger, but you run the risk of over charging your batt and burning up the plates and cells to the point that it will not keep a charge, hense defeating what you want to do.
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Old 09-25-2013, 11:48 AM   #4
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Quote:
Originally Posted by Taranwanderer View Post
(c) flip the battery disconnect so that the battery is totally isolated from the converter.
This is what I do.

Quote:
Originally Posted by Brother Les View Post
Isolate the batt if you want to do desulphating with the charger, but you run the risk of over charging your batt and burning up the plates and cells to the point that it will not keep a charge, hense defeating what you want to do.
Les, how would the process burn up the plates assuming that they have added distilled water to each cell to the level appropriate for their battery? I guess, it could be dependent on the charger but I don't see how the pulse action of a decent charger with a desulfator mode would burn up the plates.
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Old 09-25-2013, 12:37 PM   #5
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This is what I do.



Les, how would the process burn up the plates assuming that they have added distilled water to each cell to the level appropriate for their battery? I guess, it could be dependent on the charger but I don't see how the pulse action of a decent charger with a desulfator mode would burn up the plates.
In reading about desulfating a battery, bursts of power are asked for to get the sulfate off of the plates. It takes a long time to do this to get the sulfates off. Keep a batt on a charger for a long time at anything above a trickle charge can and will over charge a batt to the point of going in the same direction of where you do not want to be (bad batt). The bottom line is to keep you batt in the best shape (top voltage and amps) as long as possible (years). My view point is to just not let your batt get drained to the point of being so weak to allow massive formation of sulfates on the batt plates.

imo
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Old 09-25-2013, 01:44 PM   #6
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Quote:
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Keep a batt on a charger for a long time at anything above a trickle charge can and will over charge a batt to the point of going in the same direction of where you do not want to be (bad batt).
Agreed - but the battery chargers that I have used and read about compensate so as to avoid overcharging by desulfating the shortest possible time and without developing excessive heat (e.g., BatteryMINDer and Stanley chargers comes to mind). This is when they are using the pulses as you described earlier.

Earlier, you mentioned overcharging and what you seem to have been describing is the possible negative effects of equalization, which is a controlled overcharge and is done when there is low or wide ranging specific gravity (+/- .015) in cells after fully charging a battery. This process also helps to remove sulfate crystals that might have built up on the plates but is primarily used to reverse stratification (acid is greater at the bottom of the battery than at the top).

It certainly requires careful attention to gassing and battery heating and I can see where this could damage a battery.

Quote:
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The bottom line is to keep you batt in the best shape (top voltage and amps) as long as possible (years). My view point is to just not let your batt get drained to the point of being so weak to allow massive formation of sulfates on the batt plates.
I also agree that it is not good to let batteries overdischarge (discharging more than 50% for example). But, my understanding is that sulfation is always occurring even in normal use (source and source) but the process is much faster with undercharged or discharged batteries. So, even when a battery is normally used and stored fully charged, sulfate will form and is a reason to pay attention to it and take the appropriate steps to maintain your batteries. Keeping a battery fully charged will not necessarily preclude that need.
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Old 09-25-2013, 06:34 PM   #7
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Thread's going off the rails here a little...

Just to be clear: the battery is not in any state of discharge, my converter has been plugged in non-stop for the last 4 months. Voltage is good. I'm also not worried about over-charging the battery by using a 1.5 amp desulphating Battery Minder--they're designed not to overcharge, just like our converters are. So it's not a question of over-charging, and I know that the best battery life will be to keep it charged as full as possible as often as possible. I'm not trying to charge, I'm trying to desulphate before winter. Its the "bursts of power" that I'm worried about possibly doing damage to the converter if both are left on, or if the battery isn't disconnected from the rest of the system during the process.

Thread back on track...
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Old 09-25-2013, 06:52 PM   #8
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Sorry about that.

As I say, I disconnect. But, I did talk to BatteryMINDer a while ago and asked about running their unit simultaneously with the WFCO. That tech told me that I could run their unit while charging through the converter. However, he wasn't able to explain to me exactly why that was so other than to say their unit would compensate. I'm not comfortable with that, but I didn't pursue it any further.
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Old 09-25-2013, 08:48 PM   #9
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I bought and installed one of these;
PowerPulse PP-12-L 12V Desulfator
Because of a recommendation on this forum.
My charger and converter do not have a desulfation setting or capability.
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Old 09-25-2013, 10:16 PM   #10
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Not meaning to distract from the main thread, just learning. Thank-you for the conversation. Does the 'BatteryMinder' (product name?) say that it is for desulphating a batt? I thought for the desulphating there needed to be a burst of high power to the batt for a short time and repeated periodically. Doesn't the 'Batteryminder' just have a steady charge that reduces as the batt becomes more fully charged?
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