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Possibly a low cell group causing the BMS to cut power. Have you left the battery on a long charge to balance fully since the cutout started?

I think that's your problem. You need to press and hold [up] & [down] within 5 seconds of powering the LCD display, not after.

https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F143122648951

72V KT controller/LCD is also avaliable direct from BMSBattery. Not much help if you're looking for a UK supplier, but still an option.

Have you thought about adding a Cycle Analyst V3 to your existing setup? It'll give you the option of cadence or torque sensor PAS, an LCD display and a heap of other possibilities too.

What an unusual bike! May I ask what the advantage is over a 2 wheeled fat bike?

One of my favourite cycling blogs 'London Cyclist' is shutting down. As a kind gesture to the community, the owner has made their eBook, '35 London Cycling Routes with GPS' free (previously £9.95). Definitely worth a look if you enjoy a leisurely ride through our capital...

I've used a couple of these and they've both output reference voltages within 0.002V of their advertised voltage, confirmed with a calibrated meter and another trusted voltage reference. Out of interest, what would you use as a preferred voltage reference source?

If you don't own an accurate power supply or multimeter that you can trust, a voltage reference board such as this can be invaluable: https://www.ebay.co.uk/itm/AD584-High-Precision-Voltage-Reference-Module-4-Channel-2-5V-7-5V-5V-10V/141888417230?hash=item2109356dce:g:J20AAOSwXshWqF~m#rwid

Open them up and have a look for a voltage adjustment potentiometer.

No reason whatsoever.

No need for a third magnet. If the two magnets are oriented in the same polar direction, their active faces will repel each other.

You draw a good parallel to drink driving. Laws did little to stop it, but changes in social attitude brought about the reductions we have seen throughout the last decade.

Perfect summarization. This story is an argument for putting plates on people, not cyclists.

The behaviour you describe is exactly how it should work. The insides of a geared motor do not spin without power applied, so the hall sensors will not generate a signal. If you want a speed readout that works at all times, you need to fit a separate wheel speed sensor and then configure as...

It becomes more pertinent running at increased power levels, where granular control is almost impossible at low speed over varying terrain with rapid changes to motor loading. It's difficult to describe, but I think it might be down to the fact that even better speed throttle controllers...

So definitely a speed speed throttle controller, but with a better control implementation than the cheapest of speed throttle controllers out there. Better speed throttle controllers (such as your Lishui) do take into account the actual/target speed delta and vary current accordingly, although...

If minimal throttle is applied with the drive wheel in the air, does the motor turn slowly (speed throttle) or ramp up to near full-speed (current throttle)?

Are they speed throttle or current throttle controllers?

A speed controller's input voltage is directly linked to motor speed. When the throttle is actuated, full power is applied until the desired speed is reached. When the motor load changes, power is automatically regulated to maintain this speed. This might sound like a desirable feature, but in...