volts Ah watts

[billyboya]

Im selling a old electric bike, and someone has asked if its 250W But I don't really know, I have fitted a single Lithuim battery to it 24V 16Ah from 2 x 12v lead acid ones. but is there a way of knowing the watts

 

[PC2017]

knowing the watts

Is there no markings on the motor

 

[matthewslack]

If there are no markings or label on the motor, that might be because they were not required by the law at the time it was built.

Anything that had a lead acid battery is likely pretty low powered because range would be so bad if it wasn't. But without labels or markings, no easy way to know the motor power.

Is there anything online if you search for the bike make and model?

 

[Nealh]

Depends on the bike age, a lot of early bikes were ony 200w rated as that was UK law, though as flecc has said 250w rated bikes weren't questioned as that was the EU mandate.

 

[billyboya]

Depends on the bike age, a lot of early bikes were ony 200w rated as that was UK law, though as flecc has said 250w rated bikes weren't questioned as that was the EU mandate.

Well as you know Nealh its very old like yours you said earlier. a swigbee or something. and you said mine needs to go in a museum PMSL so that's how old it is

 

[flecc]

Im selling a old electric bike, and someone has asked if its 250W But I don't really know, I have fitted a single Lithuim battery to it 24V 16Ah from 2 x 12v lead acid ones. but is there a way of knowing the watts

Almost all the pedelecs using lead-acid batteries from that era were 200 watt rated, but that doesn't mean much for the performance. Most were high torque to deal with the weight and climbed just as well or better than others 250 watt rated.

For example the Powabykes back then were 200 watt rated but produced a peak of 600 watts and climbed well at a steady 7 mph.
.

 

[WheezyRider]

Looks quite similar to a Powabyke, especially the brushed motor. Replace the lead acid batteries with Lithium and they make good e-bikes, especially if you upgrade the motor to a modern brushless one. Plus, as it's pre 2016, you can use a throttle legally and not be dependent on PAS operation.

The Powabyke brushed motors were so huge, around 5 to 6kg and I've seen them over volted to get crazy Watts out of them. They were probably used in other countries for higher powered set ups. However, they are quite noisy and less efficient than a modern, lighter, brushless motor.

 

[billyboya]

Looks quite similar to a Powabyke, especially the brushed motor. Replace the lead acid batteries with Lithium and they make good e-bikes, especially if you upgrade the motor to a modern brushless one. Plus, as it's pre 2016, you can use a throttle legally and not be dependent on PAS operation.

The Powabyke brushed motors were so huge, around 5 to 6kg and I've seen them over volted to get crazy Watts out of them. They were probably used in other countries for higher powered set ups. However, they are quite noisy and less efficient than a modern, lighter, brushless motor.

Hi I changed the battery from 2 X 12v. SLA. To 1 single 24v 16Ah lithium one ages ago