R Martin eMaxi controller upgrade. Novice requesting info

[KaleOsaurusRex]

Hey everybody!

I'm so excited, because the controller on my R.Martin emaxi bike has blown. Not sure what caused it; i did ride with the battery turned off, but it worked fine for a few days after that. Then i took it to a bike shop for some maintenance with no battery attached and when i got it back the controller was bad.

It's time for an upgrade! So, I have an e-bike friend (username: Bronko) and he's going to help me replace it. Thank god because I am kinda lost.

So, I want to make sure that I get a high quality controller with the best tech available. One that's going to last a long time.

My intention is to find a flexible controller so that when it's time for me to upgrade the battery down the road to something bigger and more powerful I can keep using it. It would also be nice to have something programmable so that I can adjust the performance and range to my own preferences.

I want to squeeze as much power out of this bike as I can while not hurting the motor. As I understand it, this motor works at up to 1000w. Would love to know more if anyone can teach!

I'm also considering adding an additional battery that's very different from the one I have now, and was wondering how feasible it would be to find a controller that can switch between two types of batteries, and install some kind of switch? I have the stock 36v 14a mounted midframe but am considering adding a 48v 10a on the rear rack. Not sure if this is possible.

Here's the bike:

http://www.emaxi.com.tw/en/products

Here's the motor, I think:

http://www.tdcm-motor.com/products/electric-hub-motors/500w--rear-hub-motor/

Here's username 50yearoldbiker doing an extensive review. I bought this bike from him and broke the controller in half a year gotta learn what not to do :
http://endless-sphere.com/forums/viewtopic.php?f=4&t=48930&p=749104#p749104

Would it be wise to go with something with the sine wave technology like this one? The price seems too low; maybe there's a better company using this tech:
http://www.bmsbattery.com/controller/667-s06-250w-imitation-torque-square-wave-controller.html

Also, Username Bronko is offering to sell me his used custom made 48v 10a battery and make me a fiberglass case for it, along with a 36-48v 25ah infineon controller like this:
http://www.ebikes.ca/shop/ebike-parts/controllers/c3625-ez.html
He's offering the kit for 400 bucks and remember he's gonna help me install whatever I end up choosing. Seems like a good deal to me? I'd love to add that as an additional battery if I can, but he says the batteries would both have to be either 36v or 48v, not different to make it work.

Thank you so much for any info you can give me, friends! Ride on.
Will

 

[d8veh]

The S12S controller is pretty good and has some nice features. It works with both 36v and 48v. It gives about 23 to 25 amps as standard. The LCD3 display allows you to adjust the current up and down by about 5 amps. You can use the LCD to switch your bike on/off, which saves a lot of messing about. Only one thing concerns me, and that's the capability of your battery to deliver current. Unless it's a high discharge rate battery, a 10aH one is rated at 10 amps, so the controller should be set to about 15 amps max. The S12S only goes down to 18 amps.

I just noticed that you linked the S12SH, which is 35 amps. I think you need the cooking version S12S:
http://www.bmsbattery.com/controller/552-s06-250w-imitation-torque-square-wave-controller.html

 

[wesnewell]

Welcome to ES****Do this before your first post or now (it's retroactive)*****
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[KaleOsaurusRex]

Thank you d8veh! I would Love to hear any input you have my friends! Anyone else have an opinion on the matter?

 

[wesnewell]

You need to match the controller to the battery pack you'll be using. If your battery pack is rated for a 30A output, then the controller you get should have a max 30A draw. You then need to make sure it has the features you want. You can pickup controllers for next to nothing, or you can pay 5 times as much and not get anything that will work any better.
http://www.ebay.com/sch/i.html?_sacat=0&_from=R40&_nkw=36v+brushless+controller&rt=nc&LH_FS=1