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Re: Complex design issues
Thanks Dan. I don't have the figures with me right now and you may be right about the 30 amps @ 4 knots as well as the practicality of hull speed. The Fischer-Pandas ARE Direct Current / 48 volt, 10kw
By Dale Shomette · #32775 ·
Re: When the ideal house voltage please stand up?
If I am reading you right, apologies if I am getting your point wrong, you are proposing using 120v DC from the batteries to run standard AC appliances as well as the drive motor. This can’t be
By Anton · #32774 ·
Re: Complex design issues
Ok, ball park...? How much is one of these things?? ? 200 pounds doesn't sound bad for a diesel gen.
By john · #32773 ·
Re: Complex design issues
Is this a Buccaneer 32? Have you confirmed is actual service the 60 amps at 3.5 to 4 knots? If you get the reduction and prop sizing right you might do better than that. I have a similar sized boat
By Dan Pfeiffer · #32772 ·
Complex design issues
I have a 32' Bayliner sailboat (now dismasted) that I've gutted and am turning it into an electric hybrid. It has an 8 battery (185 a/h 12 volt each) battery bank of AGM Oddysey batteries to power a
By Dale Shomette · #32771 ·
Re: When the ideal house voltage please stand up?
Not sure what you are exactly thinking of, but if you are saying why not use a 120V AC motor for propulsion? The reason would be efficiency. If you are converting from DC (Batteries) through an
By Kev · #32770 ·
When the ideal house voltage please stand up?
Hi all, I monitor this group a lot but rarely contribute. That's going to change. While powering over a current over a bar here in Oregon, my v drive ended with a loud bang followed by a grinding
By Newt · #32769 ·
Lake Ontario folks?
I was wondering if there are folks here who are located in Lake Ontario and would be willing to help me assess the system that is on my boat that the previous owner put together. I obviously need to
By Scott E Erdman · #32768 ·
question about lightning
Hi Folks, This past season was the first one for me using my Pearson 10M but was a somewhat shorter one due to some health issues of my family members. I did get out several times and was able to
By Scott E Erdman · #32767 ·
Re: Sevcon gen 4 overload?
Hello Tim, Are you able to count the flash on the SEVCON ? You must have between 1 and 15 flashes (see in the attached file). It is preferable to connect to the controller via the CAN bus and IXXAT's
By Thierry · #32766 ·
Sevcon gen 4 overload?
Recently I had a fail with my electric motor installation on my yacht which I couldn't immediately diagnose. Subsequently I had a diver cleaning the anti-foul and he found masses of fishing line
By Tim Hooper · #32765 ·
Re: Cells (modules) are dying.
What prop did you end up using ?Thx?
By sw · #32764 ·
Re: Cells (modules) are dying.
Thanks for the video links. I found them interesting, since I have both LFP and NMC batteries in different applications.
By cpcanoesailor · #32763 ·
Re: Cells (modules) are dying.
If you're ever bored and have nothing better to do, watch these two videos to understand the what and why of lithium battery degradation, and the difference between the
By Anton · #32762 ·
Re: Cells (modules) are dying.
The 10yr lifespan might be a bit skeptical---I’m still driving my 2011 THINK City car (85kmiles) on its 1st battery pack with date codes of 2010 --- ie. 14 years+ old cells. I’ve never had an
By Myles Twete · #32761 ·
Re: Cells (modules) are dying.
If you want to read some in depth writing about lifepo4 batteries, here are two sources from which I have gleaned some useful information. this is an article that talks about cycle life and storage
By Anton · #32760 ·
Re: Cells (modules) are dying.
Anton, yes the big *no-no* with lithium chemistry batteries is to leave them high or leave them low. Certainly charge them to 80% and discharge to 20%. Or target a little narrower band (70%-30%) if
By Mark Stafford · #32759 ·
Re: Cells (modules) are dying.
I think that the charging to 100% is only detrimental to NMC batteries, not LFP. But you are correct that all the batteries have about a 10 year lifespan (max for NMC, min for LFP). The thing to
Re: Cells (modules) are dying.
If you read too much about lithium batteries it just makes you paranoid! I am not a chemist, so take this with a grain bag of salt, but from what I read I understand that lifepo4 and NMC batteries
By Anton · #32757 ·
Re: Cells (modules) are dying.
Nominal is a funny word. The relevant definition for batteries is, " Existing in name only; not real." For instance a "12 volt" lead acid battery is the name, but the voltage should be 12.5v or 13.7
By Mark Stafford · #32756 ·