Power in Flux

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    Glad to see your project moving along. The RSP...

    Glad to see your project moving along. The RSP units do tend to creep up on voltage slightly as their output current drops. Setting them about 0.5V low of full charge is not a bad idea. Do keep in...
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    Nice work man!!

    Nice work man!!
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    I use about 8kW at 70mph I believe. Haven't...

    I use about 8kW at 70mph I believe. Haven't ridden in awhile so Im not 100% sure. What is it geared for now?
    Either way I think gearing for 10mph over the top speed you'll need is the best way...
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    That's great news! Nope don't need any at the...

    That's great news! Nope don't need any at the moment.
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    Thata boy!! Let me know how it goes, maybe me or...

    Thata boy!! Let me know how it goes, maybe me or John will want a few more cells here soon haha.

    Sent from my SCH-I605 using Tapatalk
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    That's too general of a question. Depends on...

    That's too general of a question. Depends on many many things (chemistry, how they are first balanced, c-rate duty cycle, temperature, cell quality, DOD, etc.).

    I would go as far as saying that...
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    Yep totally agree with you. Lithium for the win....

    Yep totally agree with you. Lithium for the win.

    I have seen some 18650 cells priced at around $0.30-0.40/Wh in QTY of 1000 cells (~8kWh) shipped to the US. You still have to package them...
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    While this is true, I think you're missing an...

    While this is true, I think you're missing an oppurtunity with using the Lead cells. Basically I think they are best for testing and getting to know the bike better. They provide you a cheap,...
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    Yes for DC motors and simple AC systems it is...

    Yes for DC motors and simple AC systems it is accurate to assume that battery voltage is proportional to speed.

    Your motor is roughly 40RPM/V. So 48V will give about 1920RPM top speed. Using...
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    No the undervoltage only goes up to 30V on the...

    No the undervoltage only goes up to 30V on the Alltrax and it works with 24-90V battery input

    http://www.alltraxinc.com/Products_AXE.html

    So I don't even think you'll need to reprogram it. ...
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    That weird throttle circuit could explain some of...

    That weird throttle circuit could explain some of the issues that Chef was having with the bike before he sold it to you. I would replace it with a Magura throttle (here is a cheap one...
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