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    Crazy Fat E-Bike Pricing Exposed

    To make a long story short. Look back at the personal computer market in the 70's. 80's, and 90's. Hundreds of companies large and small pop up targeting various market segments: big name manufactures, well funded startups, small shops struggling to make rent on their storefronts, and hackers...
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    Ebike Circuit Protection, Fuses and Circuit Breakers

    I've got nothing of value to add to this thread....Except my heartfelt thanks to everyone for sharing their knowledge and experience. I was hoping to sit down this morning and fit up my wiring harness. For bench testing I have just been soldering 30amp auto fuses inline with the main battery...
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    E-bike legal advocacy

    Hello all, While I wait for some 6-pin JST SM connectors to arrive to arrive for my ebike build, I am attaching a Cycle Analyst 3 to a Cyclone 3000, I thought that I would look into ebike advocacy. It feels like ebikes are at a tipping point where it might be possible to do some coordinated...
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    Interesting data on li-ion charge voltage vs. life cycles

    I came across this link with data on charge voltage vs. life cycles and capacities. http://www.powerstream.com/lithium-ion-charge-voltage.htm
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    What's the best treatment for KFF?

    At the risk of sounding like your mother or ninth grade shop teacher :( Would a Battery Management System reduce or eliminate these types of burns by disconnecting the pack output by turning off the FETs when it senses a high current or are BMSs too slow to help in these cases?
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    Registering high powered ebike as moped.

    Thanks for all the help, I am going to set this aside for my first ebike build. Otherwise I'll get so wrapped up in the legaleze to enjoy my time in the garage. I agree that in hindsight high powered was not the best title for this thread considering some of the awesomeness others are building.
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    The Anarchist’s Guide

    These sorts of conflicts are inherent to a maturing ecosystem. Take a look at some of the posts from a few years ago, people were strapping washing machine motors to bike frames and adding a couple of 10 year old car batteries. There as great excitement if someone could make it around the block...
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    72 Volt controller max voltage??

    It is hard to give a good answer to this question because "it depends." The capacitors and FETs (Field Effect Transistors) are usually the limiting components in a controller. Vendors try to put in the least expensive components that will last the expected life of the device. Semi truck engines...
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    Registering high powered ebike as moped.

    Thanks woodlandhills. That got me pointed in the right direction. The term "builders title" or "hobbyist license plates" seem to be used in Wisconsin. I have had insurance for a primary car, collector cars, and various motorcycles through the same company for nearly 30 years without any...
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    Registering high powered ebike as moped.

    Interesting perspective. I would guess that many ebike builders lean towards your perspective. They want to be street legal, when on the street, but it is at worst not possible and at best difficult or impractical under current legislation in most states. In wisconsin it appears that registered...
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    Registering high powered ebike as moped.

    First, I would like to thank everyone who has contributed to the immense amount of knowledge on the site. I can be a bit hard to sort through at times, but it has definitely been worth the effort. I placed the final order on the big parts to my first build last night. Trek 7.2 FX (onhand)...
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    Is it possible to use a 20s BMS as 18s?

    Thanks, I'll make some selections and then contact a few vendors directly.
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    Is it possible to use a 20s BMS as 18s?

    Sorry if this is a dumb question... I am building an 18s lipo battery pack for an endurance vehicle. Is it possible to use only 18 balancing lead of a 20s BMS and leave the last two either floating or ground? I was unable to locate any 18s Battery Management Systems. thanks
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    new cyclone 3000 w mid-drive kit?

    I have a TIG welder, so some DIY bracing is not a show stopper. However, working out of the box is big plus.
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    new cyclone 3000 w mid-drive kit?

    Thanks, I'll contact vendors directly via email. This looks like a great project to help me through the January doldrums here in Wisconsin. Although it does seem likely I might freeze my tuckus off while road testing :) Sorry about the... noise and double post. I didn't realize many of the...
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    new cyclone 3000 w mid-drive kit?

    Is there any more information on the 2017 updates to to Cyclone 3000W mid-drive? $350 seems a pretty good price. Paired with with four of the Multistar High Capacity 6S 16000mAh Multi-Rotor Lipo Pack for it looks like a good entrance point for someone to dip their toe into ebikes. But if there...
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    Electrathons (with video)

    I just wanted to say hello to all the electrathon racers and the contributors here at endless sphere. When I started building my first vehicle for the upcoming season one of my primary sources of information about the electrical systems has been these forums.
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