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Open Roads Forum  >  Tech Issues

 > Kill power to Magnum remote?

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pianotuna

Regina, SK, Canada

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Posted: 09/10/17 11:19pm Link  |  Quote  |  Print  |  Notify Moderator

I use twin disconnect switches because I have twin battery banks. The switches are rated at 1000 amps contacting. I tend to remove all the loads, shut down the inverter, and then use the disconnect switches.

I do have solar which takes care of the parasitic load should I happen to forget to disconnect.


Regards, Don
Full Time in 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.

wires

Las Vegas

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Posted: 09/11/17 07:37pm Link  |  Quote  |  Print  |  Notify Moderator

FYI just killing power to the Magnum remote isn't enough to stop the standby loss since the inverter's parasitic current is more than the remote's.

I am using a Blue Sea ML-RBS Remote Battery Switch Solenoid with Manual Control model #7700 to disconnect the batteries in my rig. It is rated at 500 Amps continuous duty (700A intermittent).

I have it wired on the positive lead just after the batteries. It's ahead of a Magnum 3000W inverter and also the main lead for the coach 12V circuits.

This is a slick setup. The remote switch is inside mounted adjacent to my inverter panel so when storing after a trip I can completely disconnect power to the Inverter and all 12V circuits by simply pressing a button. There is no need to open any compartments or the battery box.

The ML-RBS also has a mechanical interlock lever so power can be locked out safely if you are doing service work.

It uses a mechanical latching design so it doesn't consume any power itself other than when you are pressing the on or off button.

If you don't need the remote capability then Blue Sea has manual disconnect switches rated up to 500 Amps which would be suitable for up to a 3000W inverter.

GordonThree

Northern Michigan

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Posted: 09/11/17 07:53pm Link  |  Quote  |  Print  |  Notify Moderator

Does killing the Magnum clear its battery history and BMK calibration? I know it resets part of the fault log as well as time and date.


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Posted: 09/11/17 08:03pm Link  |  Quote  |  Print  |  Notify Moderator

GordonThree wrote:

Does killing the Magnum clear its battery history and BMK calibration? I know it resets part of the fault log as well as time and date.
My ME2012 remembers it's settings. I don't have the BMK as the Trimetric is better suited to my needs.


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wires

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Posted: 09/12/17 04:43am Link  |  Quote  |  Print  |  Notify Moderator

GordonThree wrote:

Does killing the Magnum clear its battery history and BMK calibration? I know it resets part of the fault log as well as time and date.


Killing power to the BMK will cause it to lose its calibration. You'll see "Think'n" after reconnecting it until it recalibrates itself.

I cut power to the inverter but not the BMK when I leave the storage lot. The BMK itself draws around 0.02 amps which isn't a significant amount. That way when the main inverter power is reconnected the SOC value is still working.


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GordonThree

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Posted: 09/12/17 12:07pm Link  |  Quote  |  Print  |  Notify Moderator

wires wrote:

GordonThree wrote:

Does killing the Magnum clear its battery history and BMK calibration? I know it resets part of the fault log as well as time and date.


Killing power to the BMK will cause it to lose its calibration. You'll see "Think'n" after reconnecting it until it recalibrates itself.

I cut power to the inverter but not the BMK when I leave the storage lot. The BMK itself draws around 0.02 amps which isn't a significant amount. That way when the main inverter power is reconnected the SOC value is still working.


This makes sense. I forgot that module has its own power independent of the inverter. Thanks!

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