New File Added: Supplementary Power - Comparison Chart

Discussion in 'Motorhome Chat' started by pablomc, Feb 17, 2012.

  1. pablomc

    pablomc Funster Life Member

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  2. CHRI$

    CHRI$ Funster

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  3. CHRI$

    CHRI$ Funster

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    but missleading all the same:RollEyes:
    125 watt solar best 10 amp an hour, best sunshine in this country 10 hours so 10x10 = 100 amp a day and thats being generous
    12v genny =70 amp an hour 70x10 = 700amp =365 days
     
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  4. pablomc

    pablomc Funster Life Member

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    Feel free to download and amend and submit your own. :BigGrin:
     
  5. CHRI$

    CHRI$ Funster

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    i will :thumb:
    i bet a 12v genny comes out on top:Rofl1::Rofl1:
     
  6. pablomc

    pablomc Funster Life Member

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    It's a very subjective. :Wink: I am not convinced solar is the best option. I want a fuel cell. :Doh:
     
  7. GJH

    GJH Funster Life Member

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    What? Not the perpetual motion machine? :Rofl1::Rofl1:
     
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  8. CHRI$

    CHRI$ Funster

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    ok we will do a simple run test for a £1000:thumb:
    we will get four 110 amp flat batteries at 11,9v,i will take two and connect them to my genny,the other 2 can be connected to a 200 watt solar system,and after an 2 hours we will messure battery voltage,but i will also run a 600watt hairdryer during the run test,any takers???
     
  9. Reallyretired

    Reallyretired Funster

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    You must have a lot of hair if you need to run a hairdryer for two hours :Rofl1:

    12v generator can produce more indeed but how much fuel to run it for 10hours. If you ran it for 1 hour it would be comparable to the solar panel all day, which uses no fuel at all. You can also have more solar if you've got room on the roof. I have 4 x 80/85w which could produce 200Ah+ per day at best but needs no attention and no fuel. Convenience and silence is also a factor, also unless you make your own as you do, 12v generators are quite expensive compared to around £100 for a solar panel.
     
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  10. CHRI$

    CHRI$ Funster

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    4x80/85w solar system impressive:thumb:
    200ah+per day at best!,thats the point at best but what about the winter on a dull day???
    i was at whenbury and most of the vans had solar but all run a genny most of the day.:Doh:
    solar is good when it works:thumb:but thats the big problem it dont allways work:Doh:
     
  11. slobadoberbob

    slobadoberbob Read Only Funster

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    I agree the generator would win

    I agree with Chris the generator would win hands down.

    I admit I have no solar power. I looked at the outlay, the number of sunny days in the UK and the shade I seek in the South of France (OK EHU available there)... I also looked at wind power.. not even off the starting blocks.. cost and return of power a waste of time.

    So I am wild camping or at a show with no EHU.. my 2 x 100 amp hour batteries are going down. So yes I fire up the 4 kw genny and recharge them very fast. Cost is not the issue for the fuel it is the fact I can have the batteries back up to par for the use.

    Silent cell charging .. yes very expensive layout, but it is the issue of getting the fuel ... I had enough issues getting a couple of batteries delivered, let alone the expensive fuel in containers. Would I if I could? possible.

    So given not enough sun, given I am in a field and no EHU available I will run the generator to recharge the house batteries. It is for me a no contest situation.

    I might add I have little room on my roof for any meaningful size solar panel. I have various items that can create shade areas.. the fridge vent, the aircon box, the various roof vents and of course the satellite dome.. so unless I want to mount a massive frame above all the normal hardware on my roof I could not (and would not) have a solar panel installed.

    .... I have a sterling 1500 pure synwave invertor /charger on the RV and that gets used all the time, so I need to replenish my batteries lost power.


    Bob
     
  12. pablomc

    pablomc Funster Life Member

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    Based on Cost and out right performance the 12 volt generator wins hand down.

    I have just made mention on the other thread that the scoring is probably biased more towards overall convenience.
     
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  13. CHRI$

    CHRI$ Funster

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    good aint it:thumb:storage is not a problem its only small and light:thumb:
    noise could be better but thats something i WILL sort out when my workshop warms up a bit:thumb:
     
  14. pablomc

    pablomc Funster Life Member

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    It is chris and I am seriously thinking about it. Need to convince myself that it is a better option than just running the engine for an hour.

    Also would need to make connecting to the battery easier. Maybe have a connector on the van (similar to EHU but rated for DC), to make connecting easier.

    Also I wonder if these engines could be converted to run off gas? My thinking, a connection to the BBQ point therefore no need to carry petrol. :thumb:

    All food for thought.
     
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  15. pablomc

    pablomc Funster Life Member

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  16. Reallyretired

    Reallyretired Funster

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    What is best is always going to be down to personal circumstances. For example Bob's 4kw genny would not be the first choice of many, but he's already got one so makes sense. Likewise solar is far from ideal if you want to wildcamp for long periods in the winter.
    Surprised at the low output of the fuel cell, considering it's high cost. My solar panels will produce more than 6A on a cloudy day in February, admittedly only for a few hours. Solar suits me as I usually stay on a site/CS in the winter so EHU is usually available. My 'off-grid' use is in the summer so plenty of solar. I did carry a genny around for a year or two but only used it once, and that was really just to try it out. I don't bother now.
     
  17. pablomc

    pablomc Funster Life Member

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    Absolutely agree hence mentioning that it is very subjective subject. The file is useful as a quick comparison for the various systems and you can ignore the points system for that purpose or adapt it to fit you own requirements. :thumb:

    The fuel cell quoted (comfort 140) is the mid range which is enough for most and is not reliant on available sunshine. :Wink: The Comfort 210 will provide a charge current of 8.8 A. Would love a fuel cell, but I cannot justify the cost at this time.

    Personally I have never been convinced by solar for my needs and will most likely opt to use the vehicle engine should I need a top up, but am looking at the Sterling battery to battery charger that the likes on Vanbitz supply in order to get the best out of my batteries.
     
  18. Terry

    Terry Funster

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    I'ii take up that challenge:thumb: Will run the engine to go to shops/sight seeing for two hour @110 amp hr (heavy duty alternator :Wink:) so I reckon I only need about 3 quarters or one hour :BigGrin:
    terry
     
  19. CHRI$

    CHRI$ Funster

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    your on :thumb:mk 2 is 160 amp hr:Rofl1:
     
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  20. Terry

    Terry Funster

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    :BigGrin: I may invest in your old mk 1 -if price is right :Wink:
    terry
     
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