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About Eeyore

  • Birthday 05/22/1956

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  • Gender
  • Location
    Great Haywood
  • Interests
    Canals, boats and boat electrics, Preserved Railways, model railways.

Previous Fields

  • Occupation
    Senior work avoidance technician at Retired
  • Boat Name
    Done Doing
  • Boat Location

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  1. MattyB, something like half a volt difference between the individual charge voltage of the two 12 volt batteries in your 24 volt setup is far too much for new batteries. There is clearly something out of specification with one or both, be that higher or lower internal resistance than the standard specification or something else; can someone with more specialist battery knowledge advise on how to approach the supplier with this issue? The use of a balancer is simply letting the battery supplier off the hook, and is generally viewed as somewhere between snake oil and a product looking for a market.
  2. Wow, just been to something called Ikea. They have these things called “shelves”, really exciting groud breaking idea; I wonder if it could be adapted for onboard use? or too radical?
  3. I think the first problem is to do with the arithmetic and charger settings. Two “12 volt” batteries in series to give “24 volt”, manufacturers recommended charge voltage for each “12 volt” battery is 14.4 volts; so you think you’ve set your charger at 24.8 volts for two of them in series. However if you measure (during charging) 14.4 on one battery and 15 on the other, then the charger must be set to charge at 29.4 volts! You then believe that you have set the charger to 28.2 volts and see 14.2 and 14.6, meaning that the charger is set to 28.8 volts! The second problem seems to be with one of the batteries, as I wouldn’t expect to see that much difference with two new and identically spec’ed batteries. I frequently see this type of inbalance on preserved rail vehicles which have a 12 volt bank either side of the vehicle which are series connected to provide 24 volt. It’s usualy just old age and a slightly weaker cell causing the issue; not something you should be seeing with your setup. As far as I can tell you’ve simply taken the available manufacturers data and adjusted accordingly for a 24 volt setup, not sure what everyone else is reading?
  4. I did suggest that possibility in post 39 😎
  5. So if the panel is 12 volt then maybe the second relay is energised by a 12 volt feed from the key switch and the contacts connect the 24 volt battery to one side of the alternator indicator light? This is basically the same as the wiring for the second indicator light on a dual alternator setup.
  6. Have you ever found yourself traveling behind a car with a broken negative/earth on a rear lamp connector? All sorts of odd things happen when they brake or operate the indicators. Similar thing happening with your panel. ⚡️
  7. Turn off all the switches and meter again between C5 and negative. I would expect it to be open circuit; your previous reading probably came via the lamps in the switches that were in the on position. This should show that the black wire going off panel needs a negative connection. Turn the switches back on and briefly touch a test wire between C5 and negative to see if the switches illuminate. If all is well find a permenant neg for the off panel wire.
  8. Maybe one of the relays connects the 12 volt start battery positive to the midpoint of the 24 volt domestic bank, with the relay coil wired in “normal” split charge fashion from the ind terminal of the alternator. Yes I have seen this before, with 48, 24 and 12 volt batteries all charged from a single 48. volt charger! Far from ideal, but simple; the charging demands of the start battery being relitively minor. I would also expect to see a parallel link at the mid point of the 24 volt bank to further mitigate the effect of charging the starter in this way. At the end of the day a 24 volt starter would be the simplest solution, as converting the domestic to 12 volt would involve a rewire.
  9. How remiss of us, welcome to the forum AndrewBridget ⚡️. A fairly quiet post for your first one then? Expect some banter along with good advice, enjoy.
  10. You’ve got a lot of worms in that tin, haven’t you 😏
  11. I’m only expecting a functional check; the only information I’m expecting is something as simple as “all done mate, everything in the boat is working, but I did notice the voltage didn’t come up when the engine was running; you’ll need that seeing to”. I think anything less would be a disservice to the customer.
  12. The expected charging voltage is more in the region of 29 to 29.2 volts. Modern “12 volt” batteries have a higher calcium content requiring higher charge voltage of about 14.5 to 14.6 volts, so yours will be twice that. There is a trend is towards higher calcium content in vehicle batteries, so charging voltages up to 14.8 volts can be found on nominally “12 volt” systems. I still think your “professional” installer has some difficult questions to answer. The battery (or batterybank) is only part of the battery system, which by default must include a method of recharging. To demonstrate that the new battery functions as intended would include both discharging it into a load ( fridge, lights etc.) and that it charges correctly from the available charging sources. With regard to the current situation; it’s all about the economics, a day off to go and sort it now or an extra day or two at work to buy another set.
  13. I’m sure that someone will be along in a minute to tell you that you’ve just trashed £600 worth of batteries by attaching them to a charging system with known issues ☹️. We’ll need all the basic stuff to have a chance of helping you : engine type, number of alternators, voltage of starting system, voltage of dimestic system (they can be different) and a few pictures of the instalation would help. Pictures may be an issue though for new members; I think there are some restrictions. In your position I might be asking the “professional” a question or two.
  14. The durite relay also appears to have two large cables joined together on one terminal; and niether has any small wires connected to the coil connections. So 2 out of three do nothing at all; you will need to follow the wiring from the red fuse holder to see if its a member of the same club. I see Chewbacka has posted similarly on the duplicate thread.
  15. There are two genuine oil filters for this engine; Kubota supply their own brand filters. If you quote the engine number ( stamped somewhere on the engine block) a Kubota dealer will supply the correct filter.
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