Need help building a E-Bike!

[Castrol96]

Hello, I am seeking some help on converting my original bicycle into electric with buying kits online. I have gathered parts which I believe are key but might be wrong. Will the kit work with the battery and would I be able to charge it?

Thank you

Main Conversion kit: 24V 250W 3300rpm Motor Controller Conversion Kit for 22-28 Bicycle Electric Bike

https://www.ebay.co.uk/itm/24V-250W-3300rpm-Motor-Controller-Conversion-Kit-for-22-28-Bicycle-Electric-Bike/292732766276?_trkparms=aid=222007&algo=SIM.MBE&ao=2&asc=20160323102634&meid=c07fd6bca2244480af9e4161831d46c9&pid=100623&rk=2&rkt=6&mehot=pp&sd=292798320619&itm=292732766276&_trksid=p2047675.c100623.m-1



Battery: eBike 24v Bicycle 12V 12Ah Scooter Replacement Battery

https://batteryclerk.co.uk/products...MI8Z_F2_Ga4AIVF4XVCh0o-gVmEAQYBCABEgLU0PD_BwE


Charger: 24v 24 Volt Battery Charger 1.5amp Lead Acid Electric Scooter Bike Male UK Plug

https://www.ebay.co.uk/itm/24v-24-V...=item2ccb17f635:g:nTUAAOSw3h1ZSlVG:rk:22:pf:0



Other kits are very expensive I'm trying to gather a kit around £100 - £150. I'm not looking something which reaches high speeds but a kit to easily take off with.

 

[DG_Silva]

All looks fine, I see it's a 'twist and go' throttle which is going to get you into trouble with plod should they catch you because this would make it a motorbike and not an EAPC. A couple of things; 1, I can't see is a display/control module (but the description says that it has a speed controller); 2, you're intending to run a 24v system with (presumably 2x) 12v batteries, but charging it with a 24v charger - this is a BAD idea. Instead, use one 24v battery or a 12v charger.

 

[Castrol96]

All looks fine, I see it's a 'twist and go' throttle which is going to get you into trouble with plod should they catch you because this would make it a motorbike and not an EAPC. A couple of things; 1, I can't see is a display/control module (but the description says that it has a speed controller); 2, you're intending to run a 24v system with (presumably 2x) 12v batteries, but charging it with a 24v charger - this is a BAD idea. Instead, use one 24v battery or a 12v charger.

Thanks for pointing things out

I think this works as a display for the charger.

Spoiler: Picture

I did some research on the batteries, I'm planning on using X2 12 Volts ones.

https://www.ebay.co.uk/i/233090345341?rt=nc&_trkparms=aid=222007&algo=SIM.MBE&ao=2&asc=20160908110712&meid=3ef8abecb37d4f498b11af09200dd53b&pid=100677&rk=1&rkt=5&mehot=lo&sd=233087881020&itm=233090345341


I have found a charger which suits the Lead- Acid battery that is 12 Volts, but my concern is that does the battery have a Female port for the charger?

There are Trickle chargers available but I feels it's dangerous.

https://www.ebay.co.uk/itm/Electric...=item2cc332f382:g:xCoAAOSwsTdZcJId:rk:22:pf:0


Also, the kit should be fine with the law since I'm not using it to go high speeds or any crazy thing but just taking off, then I will pedal. The power of the Kit is also 250W which is legal, anything over seems to break the law.

 

[DG_Silva]

Thanks for pointing things out

I think this works as a display for the charger.

I think that's more the display for the battery and power modes. That's what I thought was missing.

I did some research on the batteries, I'm planning on using X2 12 Volts ones.

Excellent, that'll do the job, but bear in mind that you'd have to charge the batteries separately, or have two chargers. Also, you'll be looking at 6.5kg of batteries on top of the extra weight. Have a think about a pannier rack over the rear wheel and some way to lock the batteries to the rack (unless you're sure it'll be safe where you park it).

I have found a charger which suits the Lead- Acid battery that is 12 Volts, but my concern is that does the battery have a Female port for the charger?

There are Trickle chargers available but I feel it's dangerous.

Try something like this, it's a female to bare wires (if you cut the plug off) adapter. Use a soldering iron or connector block and you'll be able to connect the wires to the battery using spade connectors. You local Halfords will have everything you need, just 10 amp wire will be enough.

Trickle chargers are the safest way to recharge batteries because they put the electricity in slowly. The down side is it takes ages.

Also, the kit should be fine with the law since I'm not using it to go high speeds or any crazy thing but just taking off, then I will pedal. The power of the Kit is also 250W which is legal, anything over seems to break the law.

You're absolutely right in saying that the power from the motor can't exceed 250W (although a peak power of 1000W for 1 second is allowed to start acceleration) in order to remain an Electrically Assisted Pedal Cycle (EAPC), otherwise known as an e-bike, but the clue is in the name - Assisted; it's designed to assist the rider with pedalling.

With a twist throttle, this stops being assistance and can become a way to make the bike move aside from pedalling, and so from a legal point of view becomes an L1e-B, otherwise known as a 'speed pedelec'. In the UK, these are classed as motorbikes and so required everything a motorbike does - insurance, tax, MOT, license plate and motorbike helmet.

I'm not saying you'll get caught with this, and it's very unusual for a police officer to stop you, but just keep up the pretence of pedalling and you're unlikely to get stopped.

 

[Castrol96]

I'm thinking that this kit would cost be around £120 with no guarantee of quality, legal and risk of electrocution.

I've seen some built in wheel kits around 240w which are light, legal safe and easy to charge for around over £200. Has everything you need.



Bit worried I might be paying too much but is way cheaper than other kits. I'm plan on using this for quick delivery.

Thanks.