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Old 08-16-2014, 05:36 PM   #1
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Charging house batteries

2103 Thor Tuscany
charging house batteries from shore power stored next to home. . Now, with house batteries switch turned off batteries are charging per meter. will they over charge with the switch in the off position. Nothing in manual addressing this question
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Old 08-16-2014, 05:56 PM   #2
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It should not make any difference, I leave mine plugged in and the house battery switch off. When the batteries are charged the charger should turn off until they need more.
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Old 08-16-2014, 06:10 PM   #3
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Yes or maybe not.

Search for battery charging to get a week of reading.

In short...

Bulk mode b is high inrush current on a less than charged battery.

Absorbion is current on a near charged battery.

Float is current on a fully charged battery.

Anytime current is flowing in a battery magic is happening and chemicals are changing.

If currents exceed certian points then excess gas is created and the source of this gas is the fluid in the battery.

Charge current at float should not exceed 0.1% C so if you had a 100 AH battery the float current should be about 0.1 amps and float voltage 13.5 to 13.6.

No charger should be trusted.

All should be placed on probation until they have proven worthy.

Simply put...monitor the voltage and water levels at a regular scheduled day to insure all is well.

Over time you may determine your charger can be trusted and batteries checked monthly or that it is over charging and needs something else.

Bottom line is you need to verify what you have and how it is designed to work then determine how you will operate it to meet your needs and not cause harm to the batteries.
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Old 08-16-2014, 10:13 PM   #4
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To give you a definite answer, we need to know what the RV has by way of an inverter/charger or a converter, whichever you have. It also depends upon the voltage that is maintained across the batteries, and does it vary or is it constant at all times?
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