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Deleted member 4366
Guest
I bought this controller from BMSBattery. I bought it with some other stuff that I needed, so worked out at just over £20. It's nominally 23 amps , which I thought might be a bit low at 36v, so I added just a small blob of solder to the shunt to take it up to about 25 amps.
I bought the LCD panel and speed sensor to go with it, which adds about £16 to the cost, but worth it. I fitted everything to my old Giant NRS with a 500w Bafang BPM motor and 36v 20aH Ping battery.
The controller has a torque simulation algorithm in it. I don't know how it works or what it's supposed to do, but pedalling was a pleasant experience whatever level I set, and the throttle was nice and smooth.
The motor is very quiet with this controller. You could get a little bit of resonance at some speeds/powers, but even that isn't as loud as the previous KU123 controller.
I can't say whether it gives better motor performance than an equivalent square wave one, but it gave the motor enough power to drag my 100kg up our 14% test hill easily without pedalling, so most people will find the 23 amps adequate for most circumstances.
Another advantage from this setup is that you ca switch off the system at the controller, so you don't need any fancy master switch for the battery. There's less than one microamp discharge left like this, which means it'll take more than a thousand years for your battery to go flat.
Is it worth upgrading a KU123 to a S12S?, Probably not, but for a new build, the smoothness, 5 PAS levels and ability to switch off make for a pleasant ride and easy installation. This would be my controller of choice rather than the KU123. Power is more than adequate for normal riding and hill-climbing.
I bought the LCD panel and speed sensor to go with it, which adds about £16 to the cost, but worth it. I fitted everything to my old Giant NRS with a 500w Bafang BPM motor and 36v 20aH Ping battery.
The controller has a torque simulation algorithm in it. I don't know how it works or what it's supposed to do, but pedalling was a pleasant experience whatever level I set, and the throttle was nice and smooth.
The motor is very quiet with this controller. You could get a little bit of resonance at some speeds/powers, but even that isn't as loud as the previous KU123 controller.
I can't say whether it gives better motor performance than an equivalent square wave one, but it gave the motor enough power to drag my 100kg up our 14% test hill easily without pedalling, so most people will find the 23 amps adequate for most circumstances.
Another advantage from this setup is that you ca switch off the system at the controller, so you don't need any fancy master switch for the battery. There's less than one microamp discharge left like this, which means it'll take more than a thousand years for your battery to go flat.
Is it worth upgrading a KU123 to a S12S?, Probably not, but for a new build, the smoothness, 5 PAS levels and ability to switch off make for a pleasant ride and easy installation. This would be my controller of choice rather than the KU123. Power is more than adequate for normal riding and hill-climbing.
