Does stacking inverters increase DC input current capacity?

johnhall6095
johnhall6095 Registered Users Posts: 27 ✭✭
in Advanced Solar Electric Technical Forum #1
Hey guys.  Sorry if this is a stupid question but I've poured over my inverter docs and googled/read for a few hours and can't seem to find a straight-forward answer on this question.  I have two SE XW6048 inverters (stacked in parallel).  The docs rate a single XW6048's input current capacity at 130 amps.  Does stacking the two inverters increase the maximum DC input current capacity to 260 amps?
15kW PV, Grid-tie + 1210AH Deka lead acid battery bank, 2 x XW6048, 2 x MTTP60-150, 1 x MTTP100-600, SCP, Gateway
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  • BB.
    BB. Super Moderators, Administrators Posts: 33,631 admin
    #2
    If you have one battery bank--Yes, the two inverters' DC input current(s) add and draw that from the battery bank.

    In the end, the total AC loads on the inverters needs to be supported by DC input current and voltage... For example (using generic values):
    • 10,000 Watts AC load * 1/0.90 inverter eff * 1/52 volts DC battery bus = 213.7 Amps @ DC bus
    -Bill
    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
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  • johnhall6095
    johnhall6095 Registered Users Posts: 27 ✭✭
    #3
    Thanks Bill.  Yes, I have one battery bank.
    15kW PV, Grid-tie + 1210AH Deka lead acid battery bank, 2 x XW6048, 2 x MTTP60-150, 1 x MTTP100-600, SCP, Gateway
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  • mike95490
    mike95490 Solar Expert Posts: 9,583 ✭✭✭✭✭
    #4
     are you talking about using the inverter as a Charger for the batteries ?
    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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  • johnhall6095
    johnhall6095 Registered Users Posts: 27 ✭✭
    #5
    No, just wanted positive confirmation that inverter stacking (parallel) increases total inverter DC input current capacity.  Thanks again guys!
    15kW PV, Grid-tie + 1210AH Deka lead acid battery bank, 2 x XW6048, 2 x MTTP60-150, 1 x MTTP100-600, SCP, Gateway
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