Good Sam Club Open Roads Forum: When on inverter am I using the batteries?
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 > When on inverter am I using the batteries?

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Tinstar

McKinney, TX

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Posted: 02/05/18 12:49pm Link  |  Quote  |  Print  |  Notify Moderator

When I'm parked, plugged into shore power and I'm plugged into the inverter outlet in the refrigerator compartment, is the electricity coming from the shoreline or from my batteries?

I guess I'm asking if I am draining my batteries with the refrigerator (or other appliance) by being plugged into an inverted outlet and replenishing them at the same time with the shore power or am I bypassing the batteries since I'm plugged into shore power?

Additionally, if it's coming from the batteries, should I switch to the shore power outlet to keep from running on them?

I hope my question makes sense.


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msturtz

Washington

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Posted: 02/05/18 01:00pm Link  |  Quote  |  Print  |  Notify Moderator

You are using shore power. The inverters have an internal transfer switch to automatically switch from inverter power to shore or generator power.


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kerrlakeRoo

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Posted: 02/05/18 01:20pm Link  |  Quote  |  Print  |  Notify Moderator

It's inconsequential either way. The converter is supplying the 12 volt system when you are plugged in, and doing so at a far greater wattage than what your inverter would be pulling for a reefer.

So even if your unit did not have an internal switching mechanism, the CONVERTER would actually be supplying the power, not draining the batteries, at worst, it would take a few minutes longer to recharge is all.

Tinstar

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Posted: 02/05/18 01:39pm Link  |  Quote  |  Print  |  Notify Moderator

Just FYI, My inverter is the Xantrex Freedom SW 2012.

Mile High

CO

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Posted: 02/05/18 01:40pm Link  |  Quote  |  Print  |  Notify Moderator

Depending how sophisticated your system is, some power management systems will temporarily draw power from the inverter/batteries if overloading the shore line. If the overload persists, the power management system starts shedding powered appliances.


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wolfe10

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Posted: 02/05/18 01:52pm Link  |  Quote  |  Print  |  Notify Moderator

Your inverter has an internal transfer switch. When it "sees" power from shore or generator, it "PASSES THROUGH" THAT source to everything downstream of it.


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pianotuna

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Posted: 02/05/18 03:58pm Link  |  Quote  |  Print  |  Notify Moderator

The Freedom SW 2012 does have a built in transfer switch.


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SDcampowneroperator

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Posted: 02/05/18 05:46pm Link  |  Quote  |  Print  |  Notify Moderator

It is still advisable to switch off the inverter, power appliances directly from shore power.
Inverters are not 100% energy efficient, use more power than they produce, as well as just plain wear and tear on it and the converter. Inverters are expensive, in my experience, finicky.

time2roll

Southern California

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Posted: 02/05/18 05:58pm Link  |  Quote  |  Print  |  Notify Moderator

Put your voltmeter direct on the battery. 12.5 or less is using battery power. 13.2+ is not using battery power.


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wolfe10

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Posted: 02/05/18 06:47pm Link  |  Quote  |  Print  |  Notify Moderator

SDcampowneroperator wrote:

It is still advisable to switch off the inverter, power appliances directly from shore power.
Inverters are not 100% energy efficient, use more power than they produce, as well as just plain wear and tear on it and the converter. Inverters are expensive, in my experience, finicky.


With the Xantrex inverter/charger, makes no difference is inverter is on or off. When there is an alternate VAC source, it does NOT invert. It does two things (again with switch either on or off): passes through the 120 VAC and activates the battery charger portion of the inverter/charger.

That switch only makes a difference when there is no external source of VAC.

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