Question for those in the know!

LoboLobo Registered Users Posts: 18
I have a dehumidifier that I need to run 24 hours a day constantly.  It is a 115V unit with a rated 6.9amp draw and 750 watts.  What would be needed for operation of this unit while using 12 volt panels.  Second, battery recommendations?  Thank you in advance for any help.

Comments

  • vtmapsvtmaps Solar Expert Posts: 3,738 ✭✭✭✭
    750 watts X 24 hours = 18 kilowatthours per day energy consumption. 

    Typically we recommend that your daily load should equal 1/4 of a battery's capacity.  Thus you would want a 72 kwh battery.  A 12 volt battery bank with 72 kwh capacity is a 6000 amphour battery bank.

    To charge it with solar you would need about 8 large charge controllers, with each controller having about 1250 watts of solar panels.

    To build a 6000 amphour battery bank at 12 volts will require multiple parallel batteries, which is a poor design... you would be better off with a single string of 1500 amphour batteries configured at 48 volts.  With a 48 volt battery you would only need 2 large charge controllers, each with 5000 watts of solar panels.

    --vtMaps
    4 X 235watt Samsung, Midnite ePanel, Outback VFX3524 FM60 & mate, 4 Interstate L16, trimetric, Honda eu2000i
  • LoboLobo Registered Users Posts: 18
    Thank you!
  • PhotowhitPhotowhit Solar Expert Posts: 4,768 ✭✭✭✭

    Basically, you need a different way to humidify the air. Humidifiers have a heating element which uses a good bit of electric.

    Perhaps a mister... or evaporative cooler, these use a fan and membrane or just a fan and a fine mist. a 8-40 watt fan is the major energy use...

    Home system 4000 watt (Evergreen) array standing, with 2 Midnite Classic Lites,  Midnite E-panel, Prosine 1800 and Exeltech 1100, 660 ah 24v ForkLift battery. Off grid for @16 of last 17 years. Assorted other systems, and to many panels in the closet to not do more...lol
  • AguarancherAguarancher Solar Expert Posts: 276 ✭✭✭
    I think he's trying to remove humidity.
  • petertearaipetertearai Solar Expert Posts: 366 ✭✭✭
    Hi what type of dehumidifier do you have . That seems to use a lot of energy. 
    2225 wattts pv . Outback 2kw  fxr pure sine inverter . fm80 charge controller . victron battery monitor . 24 volts 450 ah surette batterys . off grid  holiday home 
  • Dave AngeliniDave Angelini Solar Expert Posts: 4,137 ✭✭✭✭✭
    You would use a mini-split heat pump to dehumidify !
    "we go where power lines don't" Sierra Mountains near Mariposa/Yosemite CA
     http://members.sti.net/offgridsolar/
    E-mail [email protected]

Sign In or Register to comment.