Fitting an inverter into a motorhome

Discussion in 'Tech/Mech General' started by Jim, Jun 10, 2013.

  1. Jim

    Jim Ringleader

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    I'm just about to fit a 1500w inverter. I have two 110 batteries. I've been told that it is best practice to have the inverter wired to both. ie. Neg from one, pos from another. Is this correct?

    If I can fit it to just one battery it will save me a lot of messing about and the cable run will be all of 9 inches. Is it OK to do this?

    NB the long-winded thread title is for the search engines:Wink:
     
  2. Popeye

    Popeye Funster

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    Grenville aka really retired did a super job on his wife's hair dryer power source, send him a pm James..........:thumb:
     
  3. vwalan

    vwalan Funster

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  4. Brisey

    Brisey Funster Life Member

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    Hi Jim, we had one fitted on our old Autosleepers Ravenna. The supply was taken from just the one battery, we did have two leisure batteries fitted. We had no problems with this set up.

    Brisey.
     
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  5. pappajohn

    pappajohn Funster Life Member

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    shouldn't make a lot of difference Jim, unless the two batteries are far apart.

    The battery interconnecting cable will be nice and short and, of course, the inverter inverter supply leads are better the shorter they are.

    Would make sense on a four or six battery bank as it would be further from the battery connected to, to the last battery in the bank
     
    Last edited: Jun 10, 2013
  6. ukbill

    ukbill Funster

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    what is the benefit of having a inverter on ya leisure battery ?
     
  7. pappajohn

    pappajohn Funster Life Member

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    230vac as and when needed with outhookup....within reason.
     
  8. ukbill

    ukbill Funster

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    ok thx so if i buy 1 its also best to get the highest watt yes ?
     
  9. ukbill

    ukbill Funster

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  10. vwalan

    vwalan Funster

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    depends on your battery bank .and how you charge it . i have 600amp of battery in the trailer plus a 2100amp i connect into it from a leisure bat in the truck . 6x80wat solars on the trailer roof . powers 240 v fridge .computer .twinub washer ,tv plus ariel.. in winter fine in spain morocco.portugal .
    in summer it powers fridge an d deep freeze in house. by an extension lead from the inverter .
    also good for drills grinders etc .
    i also have a 24v to 12v battery charger in the truck that tops the battery in the truck that i also connect to trailer.
    2kw inverter.
     
  11. vwalan

    vwalan Funster

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    dont use crocodile clips or cig lighter sockets with that 1500w inverter not good .
     
  12. ukbill

    ukbill Funster

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    ok i reckon i have a small invertor that charges me lappy on the move and i also have a genny so i will stick with that i just like gadgets :Rofl1:
     
  13. pappajohn

    pappajohn Funster Life Member

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    :Rofl1: defo not.....125amps through a 10amps fag plug or flimsy croc clips aint going to last very long
     
  14. pappajohn

    pappajohn Funster Life Member

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  15. vwalan

    vwalan Funster

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    we do have to remember most inverters are chinese these days . my ring one had china written on almost every component .a mate is going to check it out might be repairable .
    but running even a 600w i think is too much . far better direct to battery.
     
  16. Wildman

    Wildman Read Only Funster

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    Actually its best to get the smallest to cope with what to need to run, a 1000W is 83 amps so a pair of 80 amp/hr batteries will be down to 50% in one hour. So don't get carried away, its not power for nothing. 150W will cover most things chargers TV etc.
     
  17. schojac

    schojac Read Only Funster

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    Similar setup using modified sine wave inverter at similar price. Okay for most things like hairdryer, kettle etc but may give problems with other electrical items like laptops. Maximum I run is 1200Watt. Inverter is connected to one of two linked leisure batteries with good quality copper 16mm2 stranded cable which should be as short as possible to prevent voltage drop. No problems re cut out or heat - works for me.
     
  18. oldun

    oldun Read Only Funster

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    Assuming that i have a run of the mill inverter then what is likely to be the efficiency (watts out to watts in) of the inverter at full load and 10% load?

    Is it more efficient to get a dc to dc converter (say for laptop) rather than using an inverter and a mains to laptop adapter?
     
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