Plug in/electricity question

Discussion in 'Motorhome Chat' started by The Camper, Dec 12, 2015.

  1. The Camper

    The Camper Funster

    Joined:
    May 3, 2014
    Messages:
    14
    Likes Received:
    47
    Location:
    ex/Rochdale now fulltiming
    I am after a bit of knowledge/experience of someone more in the know about electricity.

    I am on a site in Spain with hook up and I get 6 amps + 6kwh a day.

    My fridge/freezer says in the book that it uses 190 watts – so I make that 190 x 24 = 4560 kWh

    So I am left with about 1 ½ kWh for the day, am I correct so far?

    My other issue is that on plug in my Hymer automatically charges both the 2 110amp leisure battery and the starter battery – anyone any idea how much that uses without any lights/appliances being used.

    I also have a solar panel is the system likely to still draw from the solar and use less of the plug in leccy?

    We are here for a month so I wouldn’t like to have to sell the van to pay the extra leccy used during our stay :)
     
    • Like Like x 1
  2. Badknee

    Badknee Funster

    Joined:
    Aug 25, 2014
    Messages:
    3,642
    Likes Received:
    15,233
    Location:
    notloB
    Someone will be along with better maths for the electrickery stuff but if you have solar that should charge you batteries so they won't be using any leccy.
     
  3. Doctor Dave

    Doctor Dave Funster

    Joined:
    May 18, 2015
    Messages:
    229
    Likes Received:
    477
    Location:
    Wiltshire
  4. SuperMike

    SuperMike Read Only Funster

    Joined:
    Apr 28, 2010
    Messages:
    905
    Likes Received:
    1,019
    Location:
    St Albans
    Technically your maths are almost correct, except the decimal point is in the wrong place. :xsurprised: However, the fridge will not run 24hrs per day as the thermostat should switch it off at the correct temperature. Also the Chargers consumption will change as the batteries reach full charge. I would not worry about it, as in warmer climbs, we have never had any trouble with such a supply.
     
    • Like Like x 1
  5. scotjimland

    scotjimland Funster Life Member

    Joined:
    Jul 25, 2007
    Messages:
    28,934
    Likes Received:
    25,574
    Location:
    .
    Your fridge theoretical maximum power consumption is 4.56 kWh (not 4560kWh) per 24hrs ..

    but it' s not on permanently.. it cycles on and off so won't use the full amount.. but the total used will depend on a) ambient and b) how often the door is opened and c) how much food is in the fridge.. so not an easy calculation.. i'd guestimate about 50% of the total ..

    but check the Dometic site for your specific fridge specs.. it usually gives the power used in 24hrs.

    The Solar panel (depending on size ) should provide enough 12v to keep the battery charged with little draw on the 230v mains..

    For future.. you can buy a domestic power meter that will monitor and show on a display exactly what you are using.. I had one in my RV.. made by Owl .. http://www.ebay.co.uk/itm/Owl-CM160...ss-/221960336676?_trksid=p2141725.m3641.l6368

    it's an easy install.. the transmitter clips over the mains incoming cable .. either on red or black core.. makes no odds
     
    • Like Like x 1
  6. funflair

    funflair Funster Life Member

    Joined:
    Dec 11, 2013
    Messages:
    4,458
    Likes Received:
    4,705
    Location:
    Guisborough
    For a start the 190 draw on the fridge freezer will be maximum so wont be doing this all the time.

    last time we were in Spain we had 5kWh per day battery charger switched off so solar could do its job, so running fridge/freezer and occasional water heating and microwave hair dryer essentials we were OK, I actually ran on the solar panels and inverter in the morning while we were around and then plugged back in as we went out so our use was about 3kWh per day.

    On one site we had a meter at the plug point so could read each day, on the other you just ask at reception for your readings as it was all computerised, once you have studied it for a while you will get a feel for it.

    Martin
     
    • Like Like x 1
  7. tonka

    tonka Funster Life Member

    Joined:
    Jul 2, 2008
    Messages:
    5,326
    Likes Received:
    7,583
    Location:
    Cannock, Staffs or Benidorm, spain
    As Supermike says... Once the fridge is a temperature with the door closed it uses much less, it's not running 24 hours a day at that rate.. If you left the door open then it would take 190 watts all the time..
    6kw a day is quite good :)
     
    • Like Like x 1
  8. Chipster

    Chipster Funster Life Member

    Joined:
    Oct 15, 2013
    Messages:
    376
    Likes Received:
    233
    Location:
    East Midlands On Sea
    forget my last one. Thought fridge was on 12v. Doh.
     
    • Like Like x 1
  9. Judge Mental

    Judge Mental Funster Deceased RIP

    Joined:
    Sep 2, 2009
    Messages:
    6,782
    Likes Received:
    6,034
    Location:
    Sarth London
    I always run fridge on gas..cheaper and more efficient
     
  10. The Camper

    The Camper Funster

    Joined:
    May 3, 2014
    Messages:
    14
    Likes Received:
    47
    Location:
    ex/Rochdale now fulltiming
    The leccy is in the price so it’s cheaper not to use the gas :)
     
    • Like Like x 6
Loading...

Share This Page