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Dave Bebb

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Posts posted by Dave Bebb

  1. Battery chargers

    in Boat Equipment

    Posted

    53 minutes ago, DHutch said:

    As said, to advise we really need to know more about when and for what the OP wants to use it.

    Obviously his requirements include being able to be left on permanently, for a reasonable size bank. If we then know the use and time between us we can suggest if a smaller 'maintaince' type charger such as a CTEK is enough just to keep it up, or if they need something with a bit more poke to provide good charge, 20-40amp say.  

    If you're pulling the power out at the same time, maybe even with an inverter (?) you can go even bigger, assuming the 240vac supply can keep up.

     

    Daniel

    I need a charger for permanently conectod when not on the nb 

  3. Battery chargers

    in Boat Equipment

    Posted

    1 hour ago, Tony Brooks said:

    If the photo shows all the controls and indicators then no, do not leave it permanently on because it is probably an old car one that has no voltage control so given time it would ruin the batteries. The web seems to indicate it has a crude meter the other side of the lable, that is another indication its not voltage regulated.

    You can use it but monitor the voltage. When it gets to about 14.5 or 14.6 turn it off but NOTE the batteries may not be fully charged. If left on the voltage is likrly to keep rising until you either load the batteries or you boil the acid.

    Thanks  

  5. Voltage drop when fridge turn on

    in General Boating

    Posted

    1 hour ago, Dave Bebb said:

    Just  been to the NB today. To check battery's as I had 2 on charge 1 is good the other one not  holding a charge ,put the other 2 on charge I will check the in the morning ,so the dud one must have been taking the other 3 down ,going to renew all terminals and put all new cables on hope this sorts my problems out  

     

  6. Voltage drop when fridge turn on

    in General Boating

    Posted · Edited by Dave Bebb

    Just  been to the NB today. To check battery's as I had 2 on charge 1 is good the other on holding a charge ,put the other 2 on charge I will check the in the morning ,so the dud one must have been taking the other 3 down ,going to renew all terminals and put all new cables on hope this sorts my problems out  

  7. Voltage drop when fridge turn on

    in General Boating

    Posted

    i did have the engineer but he only looked a the cables running to the 12 volt fridge and he said they are fine ,going to get all new battery terminals check all battery cables  and put Vaseline on the terminals dont think half the battery's were delivering power ,when trying to get at the battery's is awful and nearly 71 years old dose not make it easy. filled all with distilled water and put 2 batteries on charge ,might be no good now as some sells where bone dry 

  8. Voltage drop when fridge turn on

    in General Boating

    Posted

    Think I have found one reason why my voltage dropped at the 12 volt control panel oh dear some terminals nuts where loose and completely full of corrosion, and it took six pints of distilled water to top up four 110 battery's think the battery's were in some desperate nead of maintenances PS getting to my battery's is a right pain 

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  12. New fridge on. Start up

    in General Boating

    Posted

    What I am going to do is pull all the  domestic battery's out and check for distilled water while there out and clean all the terminals then back put  vasoline on them ,and work back through the wiring to the fridge and check all connections for loose or corrosion  

  13. New fridge on. Start up

    in General Boating

    Posted

    52 minutes ago, Tony Brooks said:

    Just remember that the likely faults are unlikely to cause burned wires so all may look OK but still be undersized.

    is the voltmeter still dropping to 9v on fridge start up? If not it might just have been a single odd reading for some reason.

     

  15. New fridge on. Start up

    in General Boating

    Posted

    1 hour ago, Tony Brooks said:

    That is what I am unclear about. It is also why it would be very wise to test the voltdrop between each battery post (not the terminal) and the fridge on both positive and negative. As I said in my first post on this subject I have been unable to actually measure the voltdrop/voltage when the fridge starts and only get a small kick on the needle. The starting surge is only a few microseconds long so I find the fact that your measurement it perplexing and do wonder about the meter.

    However that is only a sideline. What concerns me and a number of others who know is to do with the reliability of the fridge in longer term use,  especially when off a shoreline or some form of external generator. The basic symptoms you posted plus an informed assumption about where the voltmeter is connected still suggests undersized wiring , loose/dirty connections or a resistive switch between batteries and switch panel.

    I think it would be wise to take some voltage measurements as the fridge start at the battery posts, input to the switch panel, output of the fridge switch and at the fridge but it could be difficult to actually get a reliable measurement unless the meter will store maximum/minimum values. It woudl at least give an idea about the reeliability of the boat's meter.

     

  16. New fridge on. Start up

    in General Boating

    Posted · Edited by Dave Bebb

    Yes I understand what your saying ,why did the fridge not cut out when the voltage dropped down below the cut out  point very strange never thought of that one PS the next time I am on the nb I will take a video of what happens , I am not connected to shore line all the time only when I want to charge the battery's once a month .Just had a thought I am going to put a volt meter where I have connected to the fridge to the wires from the control panel and see if I get a voltage drop from there 

  19. New fridge on. Start up

    in General Boating

    Posted

    On 29/10/2017 at 22:26, WotEver said:

    You’re right to be worried. The cabling somewhere (everywhere?) is way too small. My guess is that the fridge has been wired from a distribution board which was never cabled for such a heavy load instead of being wired direct from the batteries (or updating the dis board feed & fuse). 

    Fergot to mention on the boats control panel with all the boat electrical things and all have what they work like horn lights there is about 20 and on is for fridge so must be right or why is it there ?

  20. New fridge on. Start up

    in General Boating

    Posted

    20 hours ago, WotEver said:

    Too much guessing. Until OP tells us how it’s wired (which appears unlikely) the only thing we know is that it’s been done poorly. 

    Had a Marine electrical engineer to have a look at the fridge and control panel and he said it's just fine safe as houses , and he checked all the electrics as well all ok 

  21. New fridge on. Start up

    in General Boating

    Posted

    17 minutes ago, Mike the Boilerman said:

     

    I think you might be confusing the transient start up current the OP is talking about, with the steady state current when cooling. The start up current might typically be ten times the steady state running current, hence the massive volt drop for half a second or so when starting.

    That's what I was trying to say but some people might have misunderstood me ,been to the boat again this afternoon to check on fridge all working fine only set the fridge on number 1 fridge been on for about 15 hours friezer working good , and inside fridge nice and cool ,check battery power and still reading 12.7 so not using much power to run it ,I have got a solar panel on the roof glad I made the switch from 240 to 12 love it 

  23. New fridge on. Start up

    in General Boating

    Posted · Edited by Dave Bebb

    Hi all just fitted new 12 volt fridge to replace our 240 volt one which I had to run of the 3,000 watt inverter when I turn on the fridge on at the 12 volt. Control panel the volt meter on the panel  drops to 9.6 volts from 12.7 just for two seconds then goes back to12.7 again ,just shows you how much power It takes to start up a 12 volt fridge PS running off 4 110 battery's 

  24. New 12 volt shorelline fridge

    in General Boating

    Posted

    All sorted new 12 volt fridge in and working ,wired it up and put in place left it over night turned on next morning working fine ,just bought a new 12volt  avtex tv and avtex aerial  fitted them so now all 12 volt on the boat will not have to run the 3,000 watts inverter which took a lot out of my battery's  

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