Tow vehicle overcharging Scamp battery - Page 2 - Fiberglass RV


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Old 10-08-2013, 06:12 PM   #15
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Byron, i am not trying to argue. You appear to understand automotive alternators, which i do not. So i am asking a question that i presume you can answer.
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Old 10-08-2013, 06:16 PM   #16
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Quote:
Originally Posted by jwcolby54 View Post
Byron, i am not trying to argue. You appear to understand automotive alternators, which i do not. So i am asking a question that i presume you can answer.
I'm sorry, the answer has to do with basic electronics more than anything else.
Explanation of terms. IR drop = Voltage drop (basic ohm's law)
equilibrium = As applied to the two batteries or more batteries, the voltage at one is equal to the voltage at the other.
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Old 10-08-2013, 06:44 PM   #17
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[QUOTE=John Linck;423597]Fgrv folks.

My new Scamp is due Jan 1st and in my excitement I may be over-processing a bit so please tell me to lighten up if you feel its warranted.

/QUOTE]

First off congrats on your new trailer. If I was in your shoes I would not be at all concerned with the issue of not having the charge wizard installed prior to taking your first trip, assuming the trailer does come with a converter Some of us have managed to get our trailers out camping for years and hundreds of days a year without one or a smart charge converter for that matter and still get years out of batteries which continue to work fine even while camping off the grid Even if you end up having to replace a group 27 deep cell battery every five years the yearly operating/replacement cost is less than one decent bottle of wine a year. The one item I would buy though is a plug in battery voltage monitor so as to ensure I did not run the battery down to far when off the grid.

Re the charge from the vehicle again its not something I would concern myself with unless it does not charge at all, which is what happens to many here more often than not. Many reasons for it - could be poor wiring connections, or as many have discovered the wire gage is to small and just to many items in the car eating up the current available - ie kids watching videos in the back seat, radio on, mobile phones charging a GPS... the list is long....

Have fun and enjoy the trailer! Plenty of time to worry about the small/minor improvements that can be done when the first big snow storm comes and your stuck inside this winter. ;-)
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Old 10-08-2013, 06:50 PM   #18
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A Two-fer....
Charge Wizard:
I wasn't giving credit to anyone for inventing it, I was pointing out that it is a trademarked name, and can't be added onto an existing converter... BTW: Can't say that I have ever seen a Schumacher converter in an FGRV of recent manufacter.

TV Charging
But then why wouldn't it just as easily see the higher voltage of the TV battery and shut down charging????

From an non-engineer point of view (I only have an 18th grade education) I have been led to understand that the two parallel batteries voltages will be seen as an averaged voltage at the alternators voltage regualtor, which may have the effect of reducing the charge rate somewhat. Then there's also something about internal resistance increasing as the charge voltage rises, but that's beyond my pay grade to discuss...

And there is always the sensing terminal on sone AC Delco alternators to consider.

That said, I have had the experience of running down coach batteries in motorhomes many, many times and there being no apparent ill effect on the engine battery while recharging. But, then again, I am not a battery and can't speak from it's point of view.

But then again, you already know the answer and are just playing Frogger, er... Troller
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Old 10-08-2013, 07:40 PM   #19
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Scamp is now using the PD9130 converter. With the PD9100 series converters you add a Charge Wizard (CW) Pendant to get the CW functions. They cost about $25.

From the PD website
The PD9130, 30 amp power converter is designed to provide reliable filtered DC power to all recreational vehicle 12-volt lighting and appliance circuits. The PD9130 converter also provides safe and rapid recharging of RV batteries. Built-in features such as electronic current limiting, reverse battery protection, high voltage protection, low voltage operation, and over temperature shut down ensure long term reliability. The built-in TCMS (Total Charge Management System) connector allows the RV manufacturer, dealer, or owner to easily add the Charge Wizard. The Charge Wizard is a microprocessor-controlled system that constantly monitors the battery voltage and

use to ensure a rapid; yet, safe, recharge. The Charge Wizard can select one of three charging voltages and one of four operating modes depending on the condition and use of the battery.
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Old 10-08-2013, 08:07 PM   #20
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Ok, so if you hook a discharged and charged battery together, the voltage is the higher of the two. The alternator 'sees' a charged battery and stops charging.

Thanks!
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Old 10-08-2013, 08:22 PM   #21
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Thanks for the update.

About three years back ,when I last installed one, the 9100 series came with the Charge Wizard incorporated and the Manual operation pendant was an option. I don't think that the 9130 was around then.

It's commendable that Scamp has moved away from the lesser brands of converters, but unfortunate that they still force the buyer to purchase what shoud be standard equipment. Maybe they are taking lessons from the Airlines. Makes me now wonder what they are using for AC and DC distribution.

BTW: Here is a link to the Charge Wizard that can be added to certain PD converters.

Charge Wizard PD9105 Battery Chargers from Progressive Dynamics

Thanks Again for the update



Quote:
Originally Posted by Eddie Longest View Post
Bob
Scamp is now using the PD9130 converter. With the PD9100 series converters you add a Charge Wizard (CW) Pendant to get the CW functions. They cost about $25.

From the PD website
The PD9130, 30 amp power converter is designed to provide reliable filtered DC power to all recreational vehicle 12-volt lighting and appliance circuits. The PD9130 converter also provides safe and rapid recharging of RV batteries. Built-in features such as electronic current limiting, reverse battery protection, high voltage protection, low voltage operation, and over temperature shut down ensure long term reliability. The built-in TCMS (Total Charge Management System) connector allows the RV manufacturer, dealer, or owner to easily add the Charge Wizard. The Charge Wizard is a microprocessor-controlled system that constantly monitors the battery voltage and


use to ensure a rapid; yet, safe, recharge. The Charge Wizard can select one of three charging voltages and one of four operating modes depending on the condition and use of the battery.
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