Generator(generac) starts in search watt mode with inverter model MS4024 (Magnum)

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sdusablon
sdusablon Registered Users Posts: 1 ✭
in Grid Tie and Grid Interactive Systems #1
Hi everyone
Since i'm new to this forum and since english is not my first language, i hope you will forgive me for any misunderstanding.  

Here is my problem.

I have a solar powered electrical system at my second home, that is not tied to a grid.  

Six 250w solar pannels, six 250Amp batteries tied for 24v output with 750amps reserve, a magnum MS4024 inverter with all the remote options, a generac gardian 8kW generator, all of wich are tied to the house electrical box for 120/240 ac output.  

If the generator is set in auto mode (wich is the desired setting if you want peace of mind), it will start automatically in three separate occasion wich are the following
1- Batteries are discharged beyond the cut off voltage set in the preference. (23v for my setting)
2- Batteries are discharged beyond the auto start setting of the auto generator start option of the inverter (24,1v for my setting)
3- And everything works fine except for one details : generator starts when the inverter, placed in searchwatt mode, goes in idle mode.  

In other words, the auto setting of the gererator mistakes the idle mode of the inverter for a current shut down.  

Result, i cannot use the searchwatt mode and i cannot bring the inverter to go in idle.  

Help me please.
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  • Estragon
    Estragon Registered Users Posts: 4,496 ✭✭✭✭✭
    #2
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    I suspect the auto mode is designed to start the generator when the AC from a grid connection goes down. With no grid connection, putting the inverter in search mode makes the generator think it's a power failure.

    You may want to see if other than auto mode will trigger a start based only on DC voltage.
    Off-grid.  
    Main daytime system ~4kw panels into 2xMNClassic150 370ah 48v bank 2xOutback 3548 inverter 120v + 240v autotransformer
    Night system ~1kw panels into 1xMNClassic150 700ah 12v bank morningstar 300w inverter
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  • mcgivor
    mcgivor Solar Expert Posts: 3,854 ✭✭✭✭✭✭
    #3
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    Perhaps a stand alone AGS such as the one in attached pdf is something that may work in your situation 
    1500W, 6× Schutten 250W Poly panels , Schneider MPPT 60 150 CC, Schneider SW 2524 inverter, 400Ah LFP 24V nominal battery with Battery Bodyguard BMS 
    Second system 1890W  3 × 300W No name brand poly, 3×330 Sunsolar Poly panels, Morningstar TS 60 PWM controller, no name 2000W inverter 400Ah LFP 24V nominal battery with Daly BMS, used for water pumping and day time air conditioning.  
    5Kw Yanmar clone single cylinder air cooled diesel generator for rare emergency charging and welding.
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