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    Is BMC V4 really more efficient than V2?

    I was curious and compared latest V2T (with V4 clutch and doubled phase wires) and V4T side by side, ran only a few tests, wouldn't say my testing was thorough, because not all planned tests were completed (different amps, load, rpm, etc...), but according to the data I was able to collect...
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    BMC 50A controller 'no arc' and 'CA-DP support' modification

    This topic may interest BMC 50A controller owners. These controllers are known generate big electric arc at power on caused by inrush current to charge five large capacitors inside controller. The video shows how to split caps from the rest of the circuitry so they remain charged after...
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    Geared hub motors: BMC vs MAC Shanghai

    I've been using BMC geared hub motors for about three years on most custom built ebikes, also been selling (and still am) ebike conversion kits with BMC V2 and V3 motors. I really like geared hubs for their high performance, light weight, small size / stealth, and freewheeling. I am asked a lot...
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    BMC 50A controller & 1000W V3 motor

    Testing setup: xtracycle, BMC V3 1KW motor, BMC 50A controller, 50V LiFePO4 pack, stand alone cycle analyst. Unfortunately testing lasted only a couple of minutes. I started with going up about 12-15% grade hill at full throttle. Throttle response was smooth. Current draw was about 44A on...
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    ebay LiFePO4 sellers to avoid: ep-battery, volgood

    I've had very disappointing experience buying LiFePO4 battery packs labeled VPOWER from ebay sellers power_battery_a123 and volgood which actually seem to be the same guy. Here is list of sellers who sell same VPOWER product: power_battery_a123 ep-battery volgood vpower.hk CAMMY_CC I...
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