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  1. T

    Questions around a 40kW build

    No sorry, I don't know the regenerative efficiency. Someone here would have tested at least some of the more popular controllers I'm sure.... There would be a few ways you could approach the challenge of a fallback, but if it was my project on second thought I'd probably be looking at how other...
  2. T

    "Copper/nickel sandwich" buses for series connections

    Thanks. I've opted with the factory made link with 0.5mm copper bus and 0.15 copper/nickel plate connector as shown in the photo attached to my last post.
  3. T

    Questions around a 40kW build

    Taking into account you are going to be running three props. In my research, this is what I've come up with: High amperage battery. This is done by using lots of high discharge cells in parallel. Check out molicel p28a for example @ 45 amps. High voltage. 72v - 108v typical. So, run lots of...
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    "Copper/nickel sandwich" buses for series connections

    I've opted to try the factory made copper nickel link off AliExpress. No factory data available on it's rated amps, but uses a 0.15mm nickel plated copper tab for welding, and 0.5mm copper for the actual link plate. Seller is claiming 200a, which seems very high. I only need to achieve 40a, so...
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    "Copper/nickel sandwich" buses for series connections

    Great thread. I'm using Molicel P42A 21700 cells with max continuous discharge of 45 amps. I'm doing an unusual battery configuration, similar to a "bosch powertube", with 10 21700s lengthways in an offset fashion, resulting in a cylindrical shape (3, 4, 3). The resulting battery config will be...
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    Questions around a 40kW build

    I appreciate the stream of inspiration that comes through here. I'm a lifelong builder of things, and next on my list is an electric motorbike. I am comfortable with 90% of the build I have in mind, inspired by the photo I've attached. It's a BMX style, but obviously electric. it will be for...
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