Outback Radian Grid Zero Mode

WxboyWxboy Posts: 70Solar Expert ✭✭✭✭
I just got my Radian GS4048A wired into the house through a sub panel and I want to try out the different operating modes but I'm having trouble getting Grid Zero mode to work. The Radian should use battery power until the batteries reach a low voltage set point or a pre-set load limit and then it calls on the grid for assistance. When I turn the mode on it just passes through grid power and doesn't invert. Mini Grid is operating as I would expect where it uses battery power until it drops to a set voltage and then it switches to grid. Anyone with a Radian know if there is another setting that has to be on or off to get the Grid Zero mode to funtion? I'm sure there is something simple that I'm missing.

Comments

  • verdigoverdigo Posts: 427Solar Expert ✭✭
    Re: Outback Radian Grid Zero Mode

    Perhaps the battery bank current/voltage sags and there is not enough PV to make up for it to begin selling.
  • WxboyWxboy Posts: 70Solar Expert ✭✭✭✭
    Re: Outback Radian Grid Zero Mode

    After talking to a couple of different people at Outback I learned that Grid Zero will pass through grid power until the loads exceed approximately one amp(@240v). At higher loads it will use a mix of grid power and battery/renewable energy to power the loads. The mix of power can be adjusted in the settings. I was trying to test grid zero with too small a load so it wasn‘t inverting. I have since tested it with higher loads and it is working.
  • inMichiganinMichigan Posts: 50Registered Users ✭✭
    I've been experimenting with grid-zero mode as well. I don't like the mini-grid mode, because it doesn't limit the current draw placed upon the batteries. With a ~1500+ watt house load, the system prefers to draw from the grid instead of the PV. If I switch to Mini-Grid, it inverts from the battery and PV carries the load. As soon as I switch to Grid-Zero, it stops inverting Dc and goes into pass thru from the grid. From OpticsRE, I see a AC grid current limit of 5 AAC... yet from the MATE3, I can't find the same parameter. I suspect this 5 amps is the key. If I have very small loads, say ~1000 watts, it seems to work properly. If I could find this Grid Current Limit AAC, as seen here:
    2015-08-02%20grid%20input%20AC%20limit-L.jpg
    within the setup, I change it asap.

    Anybody know where it is?
    42 SP-335's (14.1kw) ->   4 FLEXmax 80's /  100 AH CALB /  FLEXnet DC  /  MATE3  -> 2 Radian GS8048A and watched over by Vantage Pro 2+ PWS
  • mnc1mnc1 Posts: 1Registered Users
    Perhaps you should look at the DOD amps setting for the Grid Zero mode under Inverter settings
  • DaraDara Posts: 6Registered Users, Users Awaiting Email Confirmation ✭✭
     Outback Radian Grid Zero Mode

    Hi,
    I just got GS7048E,
    I want to use it in Grid Zero mode.
    But I don't know this mode can be charge the battery bank from the Grid or not?
    please help?

    Regards,
    Dara
  • Raj174Raj174 Posts: 393Solar Expert ✭✭✭
    edited March 13 #7
    Hi Dara,
    The charging function is disabled when the Radian is in Grid Zero mode. If the battery bank has reached the DOD volts limit, then the Radian will wait for the charge controller to start charging the batteries before it will start inverting again. It's priority is to offset grid use in favor of solar production. I do grid charging with my Radian in Backup mode when I need to, like in the fairly rare case of an approaching storm and a possible loss of the grid.
    If I can be of help with any other concern, just ask.

    Rick 
     
    12 x 300W Renogy PV, MNE175DR-TR epanel modified, MN Classic 150, Outback Radian GS4048A, Mate3, 51.2V 195AH HI Power LiFePO4 no BMS, 4000W gen.
  • DaraDara Posts: 6Registered Users, Users Awaiting Email Confirmation ✭✭
    Hi Rick,

    Thank you very much for your explanation.
    anyway, could you please advise that for this gridzero mode, the inverter can work or not when grid cut off?

    Dara
  • Raj174Raj174 Posts: 393Solar Expert ✭✭✭
    Hi Dara,

    If the Radian is in grid zero mode and the grid gets disconnected then the Radian will function as an off grid inverter (backup mode) until the grid is restored. Of course you will need to keep an eye on available battery power and run a generator as needed.

    Rick  
    12 x 300W Renogy PV, MNE175DR-TR epanel modified, MN Classic 150, Outback Radian GS4048A, Mate3, 51.2V 195AH HI Power LiFePO4 no BMS, 4000W gen.
  • DaraDara Posts: 6Registered Users, Users Awaiting Email Confirmation ✭✭
    Hi Rick,

    Thank you..
    If Radian is an off grid inverter, it's not damage by over loads?
    Total loads of house is 15KW. 
    The Radian max. capacity is 7KW.
    If no have grid support and loads run over 7KW, what happen to Radian?
    Please help to advise!!!

    Dara
  • Raj174Raj174 Posts: 393Solar Expert ✭✭✭
    edited March 16 #11
    Hi Dara,

    Hopefully you do not mean the house load is 15 kW, but is 15 kWh (15 killowatt hour), which is an amount of power used in a days time that is more inline with the size inverter you have. A 15kW load is a very large load indeed, and far too large for the 7kW Radian.
    If a 15 kW load were placed on the 7kW Radian, it would immediately shutdown on a low output voltage fault to protect itself from damage. 

    Rick   
       
    12 x 300W Renogy PV, MNE175DR-TR epanel modified, MN Classic 150, Outback Radian GS4048A, Mate3, 51.2V 195AH HI Power LiFePO4 no BMS, 4000W gen.
  • DaraDara Posts: 6Registered Users, Users Awaiting Email Confirmation ✭✭
    Hi Rick,

    It's a 15KW loads. so I need to separate load to met with Radian. 
    I'll test to run this system. 
    I would love ask you later if have any problem.

    Thank you very much!
    Dara
  • Raj174Raj174 Posts: 393Solar Expert ✭✭✭
    Dara,

    15kW is a lot of power and likely the only thing that could use that much is electric heating. If their is a 15kW load in the sub panel that the Radian services then it should probably be moved. The Radian could work with that load in grid zero, to partially offset it, but it presents other problems and is not a good design in my opinion.

    Rick

    12 x 300W Renogy PV, MNE175DR-TR epanel modified, MN Classic 150, Outback Radian GS4048A, Mate3, 51.2V 195AH HI Power LiFePO4 no BMS, 4000W gen.
  • DaraDara Posts: 6Registered Users, Users Awaiting Email Confirmation ✭✭
    Hi Rick,

    I'm not clear about support mode.
    Could you please explain?

    Thank !
    Dara



  • Raj174Raj174 Posts: 393Solar Expert ✭✭✭
    edited July 5 #15
    Hello again Dara,
    The Radian in support mode will use the inverter and battery to help start and run loads that are too large for an AC power source such as a smaller generator.

    Rick
    12 x 300W Renogy PV, MNE175DR-TR epanel modified, MN Classic 150, Outback Radian GS4048A, Mate3, 51.2V 195AH HI Power LiFePO4 no BMS, 4000W gen.
  • DaraDara Posts: 6Registered Users, Users Awaiting Email Confirmation ✭✭
    Hello Rick,
    Thank !
    It not affect to inverter when Grid or generator cutoff?
    Or when the grid or generator cutoff, radian also off?

    and Support mode can do the three-phase stacking?

    Thank !
    Dara
  • Raj174Raj174 Posts: 393Solar Expert ✭✭✭
    Dara said:
    Hello Rick,
    Thank !
    It not affect to inverter when Grid or generator cutoff?
    Or when the grid or generator cutoff, radian also off?

    and Support mode can do the three-phase stacking?

    Thank !
    Dara
    Hi Dara,
    The Radian inverter will go into backup mode if the grid disconnected while in any other mode. I believe support mode is available in a three phase stacked setup, but not sure. I wouldn't think battery support would be needed with that amount of available power. For better confirmation on this, register and post your question on the Outback support forum.

    http://outbackpower.com/forum/

    Rick
    12 x 300W Renogy PV, MNE175DR-TR epanel modified, MN Classic 150, Outback Radian GS4048A, Mate3, 51.2V 195AH HI Power LiFePO4 no BMS, 4000W gen.
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