Overvolting ebay 36v controller 48v lead acid

[All torque]

Hi I'm a Newby on here please go easy on me..
I'm modding a razor quad 24v,
I want replace the 24v controller with a cheep ebay Chinese 36v 1000w controller and overvolt with a 48v lead acid pack as ther cheep..
Now comes the maybe stupid question..

Could I charge the 48v pack from the 36v controller By sticking in a charge lead?
Would I need a 48v charge lead?
Could I just use 36v charge lead?
Is it a fire hazard?
Or should I just stick to getting a 48v 1000w controller for the simplest.. Thanks anyone

 

[amberwolf]

I want replace the 24v controller with a cheep ebay Chinese 36v 1000w controller and overvolt with a 48v lead acid pack as ther cheep..

Use a 48v controller. A 36v may or may not be able to handle 48v, and it will not shutoff when the 48v pack gets low, to protect it against overdischarge, so you risk destroying your battery pack on the first long ride.

Could I charge the 48v pack from the 36v controller By sticking in a charge lead?

You need to charge it by using a 48v charger designed for lead acid, connected to the battery itself via whatever wiring you choose to add.


Also...you're almost certainly going to burn out that 24v motor pretty quickly. Most of them are only 100w motors, and running htem at ten times that limit generally equates to enough heat to literally catch fire under the right loading conditions.

Even if you don't burn it out, it may just leap out from under you and go toodling off down the road on it's own, at least the first time, so be prepared for that.

 

[markz]

Razer scooter people are modding the 24V's to 36V because the motors can handle that, the motors would not be able to handle a 48V controller because there would be too much power. Some people replace the Razer motor and are able to do 48V.

 

[dogman dan]

Good advice to stick with 36v max, if the motor is a cheap brushed motor. If its brushless, it should handle 48v better.

But bear in mind, double the voltage, the motor heats up in half the time. At some point as you increase voltage enough, any motor can be melted down in 20 min. So if you want to ride an hour, 36v is a better idea.


Mostly, you have to decide if motors are expendable, and fun to melt down, or not.