Xantrex 4024 Gen support amp problem!

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90cummins
90cummins Solar Expert Posts: 57 ✭✭
in Advanced Solar Electric Technical Forum #1
I was trying to adjust the gen support amps from 14 to 30 amps today using my Xantrex System Control Panel and the maximum amperage it allows is 24 amps.
The range is 0-48 but if I keep increasing the value it returns to 0 after 24.
I have the manuals and cannot find anything that I've missed.
Your help would be greatly appreciated!!
Thanks 90cummins
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  • Blackcherry04
    Blackcherry04 Solar Expert Posts: 2,490 ✭✭✭
    #2
    90cummins wrote: »
    I was trying to adjust the gen support amps from 14 to 30 amps today using my Xantrex System Control Panel and the maximum amperage it allows is 24 amps.
    The range is 0-48 but if I keep increasing the value it returns to 0 after 24.
    I have the manuals and cannot find anything that I've missed.
    Your help would be greatly appreciated!!
    Thanks 90cummins
    What is the AC2 in setting ?? I thought that the support had to be less than that by some number of apms, not sure though. My Outback is automatically set 2 amps below the ACin setting.
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  • BB.
    BB. Super Moderators, Administrators Posts: 33,693 admin
    #3
    Maybe I am missing something (no expert here), but:

    4,000 Watts / 240 VAC = 16.7 amps

    And if I recall correctly, you can run a maximum current (from the inverter) on a single 120 VAC leg:

    16.7 Amps * srt(2) = 24.6 amps maximum (~2,834 Watts max into a single 120 VAC load)

    So, that might be the reason you are limited to 24 amps maximum.

    The other possibility, what size do you have the AC2 Breaker input set to? It the value ~24 amps maximum? (or AC2 Breaker could be 24 amps * 1.25 NEC derate = 30 amp genset breaker)

    My two guesses.

    -Bill
    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
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  • mike95490
    mike95490 Solar Expert Posts: 9,583 ✭✭✭✭✭
    #4
    yep, all the settings are interdependent, and some are derated, giving you sometimes double derating ! Yow. That's why I like the combox, to see what's coming in and going out, and I can tweak with the SCP to get it just right.
    Powerfab top of pole PV mount | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
    || Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
    || VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A

    solar: http://tinyurl.com/LMR-Solar
    gen: http://tinyurl.com/LMR-Lister ,

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  • 90cummins
    90cummins Solar Expert Posts: 57 ✭✭
    #5
    That's the problem; I was thinking amps @ 120v the input is at 240v.
    looks like I'll set it at 15amps = 3.6kw.
    This is a great community, help when you need it!!
    Thanks
    90cummins
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