What battery should I get for a 5000w motor?

[Diego Rodriguez]

I wanna buy a 5000w kit but it doesnt come with a battery, therefore I was wandering what kind of battery would be suitable for such a setup

 

[HumanPerson]

AMORGE 14S10P 52V 40AH 80AMP Battery with Metal Box

How to order?How to order?

www.amorge.com

is one place that comes to mind.

 

[HumanPerson]

I wanna buy a 5000w kit but it doesnt come with a battery, therefore I was wandering what kind of battery would be suitable for such a setup

Welcome to the forums, by the way!

 

[HumanPerson]

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[Atavar]

A great effing big one. 5000w is 7hp. You’re going to need beefy wheels forks and dropouts too.

 

[Diego Rodriguez]

Welcome to the forums, by the way!

thanks

 

[Diego Rodriguez]

A great effing big one. 5000w is 7hp. You’re going to need beefy wheels forks and dropouts too.

a guy told me that i would need at least 25Ah and 80amps current, also if the motor says 72V ill need a battery with that voltage right? (im new to this)

 

[Atavar]

Ask the people selling the kit to recommend a battery.
A 5000 watt hub motor is going to tear up spoked bicycle wheels and dropouts.
If this is a mid mount motor it will destroy a bicycle chain and sprockets.
80 amps will drain a brand new fully charged 40ah battery in less than a half hour.
Bicycles are designed for human power. A trained and fit professional cyclist can generate 300-400 watts of power. When you put more than ten times that to the machine stuff’s gonna break.
Think of all the problems Tim Allen had every time he said “More power!”
Having said that, you be you. Let us know how it works out.

 

[m@Robertson]

If you are this green to the subject, consider NOT going to the hardest of the hardcore power levels for your first experience. Its pretty clear you don't know what you are getting into on multiple fronts. Battery amperage, voltage, bicycle frame and wheel construction...

We all have to start somewhere so I'm not being negative here. But you are clearly in WAY over your head and asking questions of people who aren't is not going to be enough to save your investment in equipment.

 

[slitespd]

I wanna buy a 5000w kit but it doesnt come with a battery, therefore I was wandering what kind of battery would be suitable for such

If you are this green to the subject, consider NOT going to the hardest of the hardcore power levels for your first experience. Its pretty clear you don't know what you are getting into on multiple fronts. Battery amperage, voltage, bicycle frame and wheel construction...

We all have to start somewhere so I'm not being negative here. But you are clearly in WAY over your head and asking questions of people who aren't is not going to be enough to save your investment in equipment.

I just measured the voltage on CR2032 today . Imagine that!!

 

[Cybersnow]

I would not start with the 72 volt battery as there have been some documented fires that happened during charging. I am also building the same set up and decided to go with a pair of 52v batteries. Can still get 5000 with two in parallel or 3300 using a single. I would advise you look at a used downhill bike as theybseem to be a lot tougher. Also there is a company building a supervstrong set of gears and derailleurs.

 

[topstone]

I would get 'a really big one' Ha ha

 

[neutron]

Did you mean 500W instead of 5000W?

 

[Cybersnow]

I think the person was talking about a non bafang kit that advertises a 5k watt motor.

 

[m@Robertson]

Yeah something like a QSMotor direct drive is where you'd be going for something like this. But even with a QSMotor, you still are probably looking at the really bigass one to get it to happily take 5kw.

Small - Bafang G060 (up to 1.5-2kw. ish)

Medium - QS205 (3kw-ish)

Ridiculous - QS273. 5kw and up

 

[Cybersnow]

Actually I am looking at a CYC motor kit to replace the current Bafang kit on my hardtail MTB. If I can find a decent priced used downhill bike, I will donate the hardtail with the E bike kit.

 

[m@Robertson]

I've got an X1 Pro that reaches 4 kw with a custom BAC800 controller. Its not something I would do again. Hearing that motor shrieking and watching that cart chain spinning so fast its traveling back in time... I haven't lost an ankle yet but I do worry about what happens if something lets go.

 

[Cybersnow]

That is really good to know!! The last thing I need is to have a loud bike and be afraid of that short chain shredding. I currently have a BBSHD on a Salsa Fargo frame. I want just a tad more power climbing some of the steep fire trails. If I go with a rear wheel motor, then I need to replace more parts. Is there a reasonably quite mid motor kit that does better than 1500 watts peak if CYC isn't a good choice?

 

[HumanPerson]

I'd think this would get you over 1900w prolly over 2200peak in your BBSHD

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[HumanPerson]

There was someone on a facebook page i remember putting together another controller like the ludicris one above