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CarpeDiem

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CarpeDiem last won the day on January 8

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About CarpeDiem

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  1. Most cars have fusible links in the start circuit. I wanted a way to manually isolate. In the event of an emergency it might be the relay controller that's smoking or worse the bms... The switch also isolates the BMS negative. Unless the bms and balancing is cascaded (which is a stupid design) then you can't truly isolate a Lithium. Maybe with a 6pst switch 😂
  2. It depends on what you want to achieve. But ultimately doesn't matter. Some standards recommend that both sides are isolated. Is the objective an emergency off, that isolates everything in the event of smoke? Or is the objective short term storage (1-2 weeks) to minimise all parasitic loads on a single battery? In a dual battery system, with solar, lithium BMS, voltage senses and all the extras you find hanging off the positive terminal and as close as possible to the battery I recommend a DPST on the negative side, that fully isolates both batteries in the event of smoke. T
  3. Well the boat also has 4kW of solar. So on a good day you could motor for 8 hrs without touching the battery... But yes it's definitely a whole lot more expensive... Reality is you don't need the generator. But everyone wants the generator because of range anxiety. An OceanVolt spec'd plug in non hybrid package (no generator) for Carpe Diem that would weigh less than the engine, take less space than engine and fuel tank, would give me 50Nm of range fully charged from shore power. The only time I have ever motored that far is on a time sensitive trip... otherwise I wait
  4. That's exactly what you do. The HH44 has a 10kW engine which is just a stock standard 3 cylinder kuboto red mechanical diesel that we all know. It has a 10 kW generator attached to the output shaft and also has the typical shaft drive propellor that most boats have. So the 10kW engine can be delivering 6kW to the drive shaft propelling the boat while driving the generator at 4kW charging your battery bank. When you stop the engine the battery powers the generator spinning the drive shaft. When you put the sails up the propellor spins the generator charging the batteries
  5. That's a great article. Thanks for sharing. I feel like I missed an opportunity to go electric 5 yrs ago... Now reading that maybe I didn't.. Haha
  6. LTO cells have 30000 cycles. LFP cells have conservatively 3000 cycles. Most now have 7000 cycles. Assume you are in a marina, you charge your batteries every week and you motor your full battery capacity (call it a conservative 15Nm) every weekend on a 3000 cycle battery bank... That's 57 years of weekend usage. They are going to outlast the boat. You run the generator occasionally cause you picked a light wind weather window and you are on a tight schedule. After 4.5 years I have put 225hrs on the engine. The most use it gets is making a deadline cause theirs
  7. An hydro generating electric motor with appropriate battery storage and a optimally engineered ice engine is an order of magnitude better for the environment. Running an ice engine at optimal torque with all the energy that can be being pumped into the batteries and nothing being wasted is why hybrid cars are so efficient. On a hybrid boat you get the double whammy option of being able to have extended range by having a propellor drive as well that can be also spun by the batteries or the diesel. When you are sailing you are also charging the batteries. And if the batteries g
  8. But you have a generator for when you need it. A purpose spec'd marine generator with a matched alternator is many times more efficient than a diesel sail drive engine. Our engines waste so much energy. I agree you can't get away from having a generator when you also have tight schedules and can't afford to Bob around for 48hrs waiting for favorable winds.
  9. I love the OceanVolt range. I really regret repowering to another diesel. A definite case of not knowing what I know now. 3 years ago I just thought I knew that diesel was the only option and there was no way electric could ever be an option... boy have I learned a lot. Where is Romanza now? Was on the poles at Westhaven but I have not seen her for a long time... A beautiful boat.
  10. This year it is $140k (ish) - so the most you get is 80% of that, which you will pay tax on - anything above that you need income protection insurance for. I will not judge if that is "low" or "high"
  11. It doesn't at all. It covers 80% of your personal income up to a threshold. After that you need income protection insurance. A lot of self employed eg tradies, come unstuck with income under the table or using valid options to reduce there income, eg fringe benefits...
  12. There's nothing to suggest this was a "deliberate" act. That's would be a very high bar to pass. He plead guilt to dangerously operating a vessel. That's a far cry from deliberating ramming your vessel into another. He didn't purposefully set out to ram the ferry. It was not a deliberate act
  13. It will be a steep hurdle to cross to get jail time - I would suggest he won't even see the full $10k of the fine. If there is no precedence then it will be in the 2k - 5k range. If there's precedence then it will depend on what those fines were and what they were for.
  14. New Zealand has ACC. While ACC is often unfair to the victim and victims often end up worse off, that's just the way it is. Our ACC is considered world leading and is envied by the developed world.
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