Supplementary Power System Comparison Chart

Discussion in 'Motorhome Chat' started by pablomc, Feb 16, 2012.

  1. pablomc

    pablomc Funster Life Member

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    After this past weekend without EHU, I have been considering that I may need to add something to top up my batteries. Also the Mrs wants to be able to use her straighteners (gas ones apparently don't do the job :Doh:).

    I am in the process of trying to put something together with a scoring system to help way up the pros and cons of solar v suit case generator v fuel cell v fixed generator. Has anyone already put together a comparison chart of the various options ?
     
  2. Reallyretired

    Reallyretired Funster

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    I haven't but solar is the only one that doesn't need fuel.:Laughing:
     
  3. JockandRita

    JockandRita Funster Life Member

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    Hi Pablomc,

    If you intend to keep the MH for some time yet, I'd go for extra batteries and solar panels.
    We have an onboard genny, and it only gets used once or twice a year. I use more petrol on maintenance running, than on actual use. :Doh: If it wasn't a permanent fixture, we wouldn't have it on there at all. :Wink:

    I am unable to comment on fuel cells, as I have no experience of them.

    HTH,

    Jock.
     
  4. scotjimland

    scotjimland Funster Life Member

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    Haven't doen a spreadsheet , but how I see it.

    Solar:

    Pros:
    * Free energy,

    Cons
    * Only works efficiently in sunlight, of little use in Northern European countries in winter when you most need it most.
    * High initial cost of panels and decent sized battery bank

    Generator

    Pros.
    * energy on demand

    Cons
    * Fuel cost
    * Noise

    Fuel Cell

    Pros
    *energy on demand
    *silent

    Cons

    * High initial cost of unit
    * Fuel not readily available and fairly expensive.


    So, summing up, unless you have money to burn I would discount the fuel cell.

    A good sized battery bank and solar panels to match is great for most of the year.. but if planning off grid 365, also have a small 1 or 2kw Honda genny as a back up .. sorted.
     
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  5. Gromett

    Gromett Funster

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    That would be my recommendation also.

    Look at the efficiency side of the equation as well. things like LED lighting and a grade 2 haircut for the missus will save quite a bit of leccy:Rofl1:
     
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  6. slobadoberbob

    slobadoberbob Read Only Funster

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    I think that sums it up

    Just about sums it really..

    Bob
     
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  7. pablomc

    pablomc Funster Life Member

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    Have discounted a genny as I have no where to store it (too big to fit under bench seats and no garage). Solar was my primary choice, but I cannot convince myself it will be of any use during winter months which is when I will need it most.

    Will put the final touches to this spread sheet then share it.
     
  8. GJH

    GJH Funster Life Member

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    Another option not listed above is a Vertical Axis Wind Turbine such as the Forgen 500 which Dingray has and the Maplins offering which Snowbird gave us his experiences of last year.

    Unlike solar they work at night/in the dark so long as there is wind to turn the blades but they are not a permanent fixture so need to be removed before travel and replaced on site. As with solar there is a high initial cost.
     
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  9. pablomc

    pablomc Funster Life Member

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    OK I have attached a chart which I have put together with a very basic scoring system.

    Please note
    it is not scientific and very subjective. :BigGrin:

    Had to attach as a doc as excel is not an option.
     

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  10. B-well

    B-well Funster

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    I once saw a mouse or some animal runing around in a wheel like apparatus and this experiment was lighting a dolls house lighting circuit. are we talking on the same wave length
     
  11. JJ

    JJ Funster

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    If you are not going to use the genny much I would not spend all that extra money on a Honda.. Kipor much less expensive... mine has lasted years... (needs a new float needle at the mo)...

    JJ :Cool:
     
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  12. scotjimland

    scotjimland Funster Life Member

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    if you have a mind, you could up load to our downloads section as an excel file

    http://www.motorhomefun.co.uk/downloads.php
     
  13. Jaws

    Jaws Funster Life Member

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    Yes, but not everyone has removed their vans roof and completely replaced it with solar panels ! LOL !!!! :Rofl1:
     
  14. CHRI$

    CHRI$ Funster

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    no 12v genny comparison????
    will produse 70 amph and needs less running time than a normal genny,so less fuel.:thumb:and cheap:thumb:
    and no efficiency comparison the best solar in the world are only 33% efficient
     
  15. pablomc

    pablomc Funster Life Member

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  16. pablomc

    pablomc Funster Life Member

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    I assume you are talking about the device you built. Is such a device now available on the market?
     
  17. CHRI$

    CHRI$ Funster

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    yes:thumb:
    although not mine:Sad:
     
  18. pablomc

    pablomc Funster Life Member

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    OK I have added a wind turbine and and the Supercharger (12v Generator similar to that which Chris has built).

    I must stress the scoring is subjective and is probably biased towards convenience.
     

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  19. lorger

    lorger Funster

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    Paul would it not be cheaper to send her to the hairdressers for a number 1 cut all over and buy her a wig.:Rofl1::Rofl1: if you mention it to Leanne and i mention it to Lorraine then we could do a comparison chart on their response :Rofl1::Rofl1:

    We have been thinking of other power source also so very interesting.
     
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  20. GJH

    GJH Funster Life Member

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    Using internal NHS communications perhaps? :Rofl1::Rofl1:
     
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