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Open Roads Forum  >  Tech Issues

 > An observation about Magnum hybrid inverters

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pianotuna

Regina, SK, Canada

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Posted: 03/14/19 09:56pm Link  |  Quote  |  Print  |  Notify Moderator

Hi all,

I'm back in the RV for a road trip. I had disconnected the Magnum from the battery bank for storage. I forgot to reconnect.

The Magnum would not pass 120 volts without being connected to the battery bank.

It (and I) survived.


Regards, Don
My ride is a 28 foot Class C, 256 watts solar, 556 amp hours of AGM in two battery banks 12 volt batteries, 3000 watt Magnum hybrid inverter, Sola Basic Autoformer, Microair Easy Start.

jharrell

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Posted: 03/15/19 06:11am Link  |  Quote  |  Print  |  Notify Moderator

Interesting I thought it would function if it had either 120 or 12, not good if something happens to 12v but need 120v and have the whole coach running through the inverter like me.


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BFL13

Victoria, BC

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Posted: 03/15/19 06:55am Link  |  Quote  |  Print  |  Notify Moderator

This came up before when it turned out that you can't run the 12v off the charger in an inverter/charger like you can with a converter and no battery. It seems the inverter/charger needs 12v from the battery to operate at all.

Another good reason to have separate inverter and converter.


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wa8yxm

Wherever I happen to park

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Posted: 03/15/19 07:21am Link  |  Quote  |  Print  |  Notify Moderator

If I had to guess I'd say it is like the Air Conditioner. Now if your A/C has a Wall Thermostat of if it is a Carrier Air V with a I/R Remote... YOu need 12 volts for CONTROL.. Same with the inverter more than likely.

NOT all are like that.


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pianotuna

Regina, SK, Canada

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Posted: 03/15/19 08:45am Link  |  Quote  |  Print  |  Notify Moderator

wa8yxm,

No there was twelve volt power to the Magnum remote. Just not to the charge and discharge terminals on the Magnum.

GordonThree

Northern Michigan

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Posted: 03/15/19 08:48am Link  |  Quote  |  Print  |  Notify Moderator

Somewhere in the manual, I'm pretty sure I recall a warning to never connect the 120v supply without the 12v supply already hooked up.

Glad to hear there weren't any fireworks.


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2oldman

New Mexico

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Posted: 03/15/19 09:03am Link  |  Quote  |  Print  |  Notify Moderator

Yes, that makes sense.

pianotuna

Regina, SK, Canada

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Posted: 03/15/19 10:51am Link  |  Quote  |  Print  |  Notify Moderator

It is just another reason to do a "patch board" installation.

I can move plugs and in 20 seconds bypass the Magnum altogether.

time2roll

Southern California

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Posted: 03/15/19 11:22am Link  |  Quote  |  Print  |  Notify Moderator

Why disconnect in storage? Why not just connect the Magnum back up before you roll?


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pianotuna

Regina, SK, Canada

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Posted: 03/15/19 03:17pm Link  |  Quote  |  Print  |  Notify Moderator

Hi time2roll,

I have disconnect switches--the Magnum does have a parasitic load--so I disconnect for long term storage. I simply forgot to turn it back on. mea culpa.

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