Dishwasher

PluckaPlucka Registered Users Posts: 119 ✭✭
*Rated voltage: 220-240V/ 50Hz My batteries are 12 volt 360 amp/hr lithium .
*Rated power: 730W-860W what effect would that have on my batteries over a 3 hour use if during that time my solar panels are producing between 30/40 amps at 12 volts.A rough idea would help.

Comments

  • EstragonEstragon Registered Users Posts: 4,494 ✭✭✭✭✭
    The panels would cover roughly 1/2 washer load, so the remaining 400x3=1.2kwh would come from batteries. 

    Assuming no other loads, and initially full bank, that would take it down from 360x12=4.3kwh to ~3.1kwh (~70%).  Could be lower with system losses and possibly poor PF machine motor.
    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
  • mcgivormcgivor Solar Expert Posts: 3,729 ✭✭✭✭✭✭
    The rated power is dependent on supply voltage the lower value for the higher voltage. That is the maximum run power when the heating element is on, not the average, to get a more accurate figure a power monitoring device, "kill a watt" or like,  would be needed. 
    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.
  • icarusicarus Solar Expert Posts: 5,419 ✭✭✭✭
    Killing the DW drying cycle would save a bunch of WH.  Using heated water from some other source would reduce consumption as well.  

    The big draw from a DW is the heater cycles.  Motor and pump are pretty small.

    Tony
  • NANOcontrolNANOcontrol Registered Users Posts: 194 ✭✭✭
    I actually run a dishwasher from a small 12V inverter.  Modern dishwashers only consume 100W maximum and 1KWH exclusive of the heating element. Typically it is only 85W as measured going into the inverter.  I run heated water to the dishwasher and added a lot of insulation to the outside of the tank which has high heat loss. Power to the existing element now goes to a relay.  That switches the water heater control from heating water to powering the washers heating element.   In addition, in the drying mode the heater is normally has an on/off cycle to reduce wattage.  As I only run 60V from my panels I have a timer to keep it on maximizing the heating.That won't work in 220 land. Too elaborate for most everyone, but this lets me have a dishwasher with only a car battery.  I had thought I married a dishwasher. I have been informed this is not true.
  • PluckaPlucka Registered Users Posts: 119 ✭✭
    Got my devanti counter dishwasher -no trouble running it off my batteries-the problem is it doesn't clean the dishes.I will try with extra powder again today.
  • mike95490mike95490 Solar Expert Posts: 9,247 ✭✭✭✭✭
    Good hot water is the key
    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
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