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Keith M

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Posts posted by Keith M

  1. 3 minutes ago, IanD said:

    You're the one who said 1.5kW, I quoted you directly...

    I have just looked at my post and it did say 1.0 / 1.5 kwatts.

    What alot of people are missing is the torque of an electric motor which you cannot compared with a diesel engine.

     

    The reason I do not often post on this forum is the people who shout put of people off who have the knowledge.

    Why cannot my figures be accepted over 5 years of development.
    With a very full order book 

  2. 1 minute ago, Neil2 said:

    @Keith M I wonder if you give us a few more details about your boat, ie how long, displacement, draught.  The figures you quote are way below what most of us assume a typical narrowboat might need, so I wonder if you have a particularly light boat, or id there is something else about it that makes it much more efficient through the water.

     

    You are making some pretty groundbreaking claims which would completely change my views of electric power on narrowboats, and probably most folk on this forum.  It isn't surprising if we are a little sceptical. 

     

     

     

     

     

     

    It is standard NB built by one of the many fabricators within the UK.

    As to weight most have been around 15+ tons.

    It is down to design and care of installation, Using correct cable and CSA of cables. and other design features.

    I one builder at Crick was stating only around 3 / 4 hours of cursing before recharging and that was Lithums.

     

     

  3. 1 minute ago, IanD said:

    At what speed and on what canal?

     

    (BTW 1.5kW is half of 3kW, not a third)

     

    If on a deep canal up North like Peter, that's not typical for the UK canals. The Vicprop calculator -- based on lots of boat experience, and theory -- says 1.5kW/2hp will give 3kts which is 3.5mph in deep water, which agrees with your number.

     

    You can of course disagree with the figures I gave, but they're based on reports from various users and companies who build hybrids, as well as calculations and diesel boat experience -- are you saying they're all wrong and you're right?

    I will try answer questions  1.0 kwatts is a third please read and reproduce all of sentence not just the bit which helps you out. 
    The figures were obtained over a number of years and now nearly 2000 miles cruised.
    I did attend Crick and did not hear the figures you are quoting more than one supply was using similar figures to which have been produced over a number of years and many craft built 

  4. 6 minutes ago, IanD said:

    Typical power consumed when cruising on a normal canal is about 3kW/4hp

    I have to dis-agree with your figures typical with the narrow boats which I have been involved with no more than / 1.5 Kwatts roughly a third of your figures. With the GPS on board display around 3.5 miles per hour

    Cursing the tidal Thames around 2.5 Kwatts against the tide part of the way. 

  5. Do not forget that there many marinas around the system, you can stop and recharge over night.

    Another good reason for joining the EBA.

     

    And a well design system should not need any recharger between Mid-March and late October to date I have five systems function with out the use of plugging over night.

  6. Why not join the Electric Boat Association.

    A wealth of knowledge. 

    39 minutes ago, IanD said:

    They don't all have to come from the same supplier, but they do need to talk to each other, and this can be the biggest obstacle unless you're willing and able to dive in and do all the coding and integration yourself like Nick did -- and a hybrid drive system is more complex than just adding lithium batteries. It's not just a typical "marine electrician" job of connecting everything up -- there may be some who can do all the integration work, but many won't have the knowledge.

    You are perfectly correct.

    As most builders are using Victron and they do let have access to there soft ware. 

    I do not see how you can start.
     

  7. 36 minutes ago, Up-Side-Down said:

    Yes and no. Obviously motor and controller is best bought from the one source but batteries, charger, generator and inverter can be sourced separately. Simply purchasing a cocooned generator without the word 'marine' in its title can half the cost of that item! 

    And what do you do when the battery charger does not work because the use of an incorrect generator.

    I have experience this situation many times.

  8. 8 minutes ago, Up-Side-Down said:

    it's not rocket science and that a half decent marine electrician can specify and fit the right combination of kit.

    First find your competent Marine electrician.
    As someone who design electrical drive systems many items will not talk to each other, that in my opinion is why always buy your system from one supplier it may cost a little more but it will work straight of the box.

  9. There is no reason why you cannot have what electrical items you may need if the system is correctly design.

    Get in the 21st century when comes to electrical design.

     

    I do hope you will be using 24-volts not the out dated 12-volts. or may be 48-volts?

  10. 18 hours ago, jenevers said:

    Suddenly there is no power coming from my Mastervolt Whisper 6000. Starts OK. Any idea as to likely cause?

    If the installation is installed to current regulations.

    Each systems which can generate AC power should have a doubled poled breaker before supplying the distribution board.

    I would suggest that this breaker for what every reason has been operated.

  11. 2 hours ago, David Mack said:

     

     

     

    Compliance with these and other standards might be greater if the documents were actually available to DIYers and small business boatbuilders, either free or at low cost.

    Acquiring the full set of standards referred to in the RCD/RCR (and keeping them up to date) is a costly undertaking, even for a large business, and few libraries make them available to the public.

    The BMEEA C of P is readily available to any one, one cost around £120.00 this is two complete ISO plus many guidance notes plus other additional information I do not consider this an expensive document.  

  12. 1 minute ago, Alan de Enfield said:

     

    And in my experience it is even worse for those home-builds who make a self-declaration of compliance never having even looked at any specifications, and just shrug their shoulders and say "its only a Category D muddy ditch, paperwork is irrelevant"

    Very sadly most professional builder take very little notice if any, to date I have been involved with Four court actions. And not one of the builders won. with significate damaged being paid.

    I just wish the people who buy these craft would use trading standards than let these called professionals get away with it. 

    Within the industry we are working to turn things around.

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