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Jen-in-Wellies

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Jen-in-Wellies last won the day on April 17

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    Iron Snail

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  1. Jen-in-Wellies

    Solar panels not charging batteries

    In particular, you have the front cover of the Victron inverter removed. This has mains voltages inside and is definitely not a place to be poking around if you aren't very sure what you are doing. Jen
  2. Jen-in-Wellies

    Stern Tube Leaking

    Silly question time. Is the dripping water definitely coming from where the prop shaft goes in to the stern gland? Is it worth checking the water hoses and plumbing too and from the gland? In particular, that type of braided clear hose has a tendency to harden and leak around joints and hose clips in quite a short time span. Jen
  3. Jen-in-Wellies

    Electrical schematic

    Battery isolators are a boat safety scheme requirement, as is appropriate fusing. Take a look at the requirements before changing this. Jen
  4. Jen-in-Wellies

    Why do we tend to forget?

    Apparently so. Born in either what is now modern day Turkey, or Syria, so would be unlikely to be allowed to come to Britain under current immigration rules. Though being executed for his faith seems good evidence for making an asylum claim. Jen
  5. Jen-in-Wellies

    Solar panels not charging batteries

    I also have a Victron BMV501 battery monitor. Here is a picture of my shunt. It is upside down, but that is just the way it is on my boat and irrelevant. The battery is connected by the thick black cable on the right hand side. There are several thick black cables on the left hand side and these go to the 12V system (and solar controller, a Morningstar on my boat), the inverter and to the hull earth connection. The shunt is the actual thing that measures current, via the twisted thin blue and black cables you can just about see going to the shunt. The shunt is a low value precision resistor and the twisted wires are used by the BMV501 to measure the tiny voltage drop across the shunt (50 milliVolt at 500 Amps) and from that infer the current passing through it either from, or too the batteries. It is very important that all the things that either take in, or add electricity to the batteries are connected on the correct side of the shunt and with nothing added to the battery negative terminals but the other side of the shunt. If the negative from the solar controller is connected direct to the batteries as you describe, rather than the other side of the shunt, then the BMV501 won't know about the current the solar controller is supplying and won't include it in the charge % it reports. You can also see two medium size red wires also in the picture. These go to the batteries and are used by the BMV501 to measure battery voltage and to supply power to the BMV501. They have 1A fuses in line to protect the BMV501. You should have a fuse in the battery plus to solar controller connection to protect the wiring if the solar controller gets an internal short circuit. The batteries can supply huge currents that could potentially set the controller, or wires on fire. Size it for the maximum current that the controller can supply. It is worthwhile reading the BMV 501 installation and use manuals. You can still download it from Victron. This will help in understanding how to connect to the shunt and how the battery monitor works. I can't help with any questions on your solar controller itself as it isn't one I know. Hopefully this will get you part of the way there. Jen
  6. Jen-in-Wellies

    Getting off grid

    I wonder if there is a topic about them? Perhaps you could start one.
  7. Jen-in-Wellies

    Solar panels not charging batteries

    What sort of battery monitor? Model? Is it one with a shunt? If so, which side of the battery monitor shunt are the solar panels connected? If the negative lead from the solar controller is connected to the battery negative side, then it will be charging the batts, but the monitor won't know it and report the same state of charge. What voltage are the batts at? Jen
  8. Jen-in-Wellies

    New CRT Logo - Discuss

    Read that too fast. First thought you were suggesting a rotting sheep, or an overflowing dog poo bin as a new logo. Though, then again... Jen
  9. Jen-in-Wellies

    New CRT Logo - Discuss

    Pump out, or cassette?
  10. Jen-in-Wellies

    Getting off grid

    And why most of those solid fuel stoves have an ecofan on top. Oops, did I just say that?
  11. Jen-in-Wellies

    New CRT Logo - Discuss

    It is the ring that the branding consultants coffee cup left on the brief from C&RT. Job done! Send them the invoice. Jen
  12. Jen-in-Wellies

    Getting off grid

    They also complain a lot less if you try and feed them only with oats.
  13. Jen-in-Wellies

    Getting off grid

    Small children would be cheaper than a horse for hauling a boat with no noisy engine, but they would be even louder! Jen
  14. Jen-in-Wellies

    Getting off grid

    What Mike says above. Energy is energy and mostly coming from the diesel engine, so it will be running harder in diesel mode to charge the batts for the next stretch of electric mode and to charge them for domestic use overnight, the same as a conventional boat. They claim that lots of modern house appliances are more practical, but the extra energy to run them still comes from burning diesel. The only saving is if you plan your trip hopping from marina to marina with electric hook ups where grid energy is less than diesel generated electricity. I am in a marina most of the time, so when cruising I'd rather be bank side out in the wilds than sandwiched between boats again. I can see doing locks and tunnels in silence would be pretty cool. My boat is quite quiet with hospital silencer and engine room sound insulation and would love it to be completely silent. I just don't get that being worth many £1,000's extra. I suspect it would be a lot cheaper to build a boat with no engine and buy a horse for silent boating. Jen
  15. Jen-in-Wellies

    Getting off grid

    Agree. In a car a bigger engine is needed for the tiny amount of time the most power is needed, climbing a steep hill, traffic light grand prix etc. The rest of the time a tiny engoine is fine. A hybrid stores energy from a small efficient engine run under optimal conditions for when extra power is needed. A boat engine runs at pretty much the same speed nearly all the time and can be optimised for that. Jen
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