Operation of the Magnum Inverter charger.

pianotuna wrote:
2oldman,On the Magnum remote one can limit the incoming amperage. If it is set low enough then output amperage nominally 12 volts will be lowered.

That's how my Prosine worked. What I was questioning was the 'charge rate.' So far that sounds like a redundant parameter given that the incoming AC can be regulated.

GordonThree wrote:

dougrainer wrote:
The charge rate feature is NOT new. It has been on Heart/Xantrex and Magnum for over 15 or more years. As explained, ALL it does is allow the Inverter/CHARGER to only pull minimum 120 amps when on less than 50 amp service. IF on 50 amp service there is no reason to change the charge rate. 50 amp service is 100 amp service, not 50 amps total. You determine what your Shore input amp supply is and then set the Charger of the Inverter/Charger to match that incoming amp supply. It then scales back the amount of charge to the Coach Batteries. The higher the charge rate, the MORE amps it will use. Doug

I have the ME-ARC remote like that video, and my Charger menu does not have a "Charge Rate %" setting. I do have the AC-amps setting.

The AC-Amps setting is HOW your system sets the charger rate %. Doug

Tom/Barb wrote:

dougrainer wrote:
50 amp service is 100 amp service, not 50 amps total.

we are not a direct total service connection.

we are a 200 AMP service to the house, and the RV 50 amp service is taken thru a 50 AMP C/B off the service distribution buss.

our RV service is limited to 50 AMPs.

That's OK. The HIGHER amp draw for the charger is ONLY for when it is on BULK charge. If you leave it plugged in, once it goes OFF BULK charge(usually after 1 to 3 hours), the amp draw for the charger section is negliable. Once in float, it pulls less than 1 to 3 amps depending on the 12 volt load in the RV. Doug

Tom/Barb wrote:

dougrainer wrote:
50 amp service is 100 amp service, not 50 amps total.

we are not a direct total service connection.

we are a 200 AMP service to the house, and the RV 50 amp service is taken thru a 50 AMP C/B off the service distribution buss.

our RV service is limited to 50 AMPs.

50A RV service is 120/240V 50A 3 pole 4 wire. The CB is is dual CB that trips when either hot leg exceeds 50A. Most RVs don't have 240V appliances so it's common for RVers to just consider that they have 2x 50A circuits.

This circuit is what allows RVs to have 3 A/Cs running along with HW, MW, charger, TVs etc.

With a Magnum charging at 125A DC it's AC input would be draw about 16A. That leaves 34A AC on that leg and 50A AC on the second leg.

The 50A label refers to the highest voltage (ie 240V) or 50*240=12,000W (watts). Your 200A house panel is similar 200*240=48,000W.

2oldman,

On the Magnum remote one can limit the incoming amperage. If it is set low enough then output amperage nominally 12 volts will be lowered.

It is even possible to force the hybrid Magnum into doing voltage support if the input amperage is set low enough.

GordonThree wrote:

Tom/Barb wrote:
Called Magnum tech support, We went thru all the settings, I had them right, 13.2 v is the proper setting for flooded batteries so I asked why the batteries run down so quickly. and as I Thought the batteries are showing their age, he asked If I had ever ran an equlizer charge, and I had not, So we are doing one now.

Thanks for the help..

Equalizer can be hard on batteries. Good that you checked the water already. If they're in a tight space, might want to open the door and use a fan to clear out the gasses.

every thing has been taken care of.
the battery tray is out in the open, and the vent caps are off.
still charging at 14.8 for the last 4 hours..

Getting there.
We will see what happens on our next trip.

Tom/Barb wrote:
Called Magnum tech support, We went thru all the settings, I had them right, 13.2 v is the proper setting for flooded batteries so I asked why the batteries run down so quickly. and as I Thought the batteries are showing their age, he asked If I had ever ran an equlizer charge, and I had not, So we are doing one now.

Thanks for the help..

Equalizer can be hard on batteries. Good that you checked the water already. If they're in a tight space, might want to open the door and use a fan to clear out the gasses.

Called Magnum tech support, We went thru all the settings, I had them right, 13.2 v is the proper setting for flooded batteries so I asked why the batteries run down so quickly. and as I Thought the batteries are showing their age, he asked If I had ever ran an equlizer charge, and I had not, So we are doing one now.

Thanks for the help..

GordonThree wrote:
I have the ME-ARC remote like that video, and my Charger menu does not have a "Charge Rate %" setting. I do have the AC-amps setting.

that is the new type, we have the ME RC50
You have the ME-ARC they look similar but program differently.

Tom/Barb wrote:
I did a hydrometer check this morning and all batteries checked in the red. (at 13.2 float charge).
there seems to be no way to increase that float charge.

will be calling Magnum Tech. support today.

Consult the instruction manual, you set the float charge voltage under battery profile.

In the Charger menu, 03C Battery Type, page 26

03C Battery Type – This setting selects the battery type, which determines the battery charge profi le and ensures the batteries are receiving the proper charge voltage. The charge voltage settings are fixed when using the GEL, Flooded, AGM1, or AGM2 selections, but can be adjusted if using the CC/CV or Custom selections.