Search found 7133 matches

by wesnewell
Oct 25 2018 3:09pm
Forum: Battery Technology
Topic: RC lipo to replace 24V sla in ups?
Replies: 18
Views: 1101

Re: RC lipo to replace 24V sla in ups?

Been over 2 years now (July 2016) that I replaced my sla batteries in my 24V ups with some 5 year old 7s lipo. Just though I'd update this for anyone interested.
by wesnewell
Apr 25 2018 2:06pm
Forum: E-Bike General Discussion
Topic: Comfort Bike build or buy
Replies: 11
Views: 544

Re: Comfort Bike build or buy

Todays powerful DD hubs can climb any mountain roads with ease and will be much more reliable than a mid-drive, plus give you the advantage of regen braking when going down the mountain. A MXUS 3000W 4505 at 72V will get you a top speed of ~35mph and ~20mph going up a 20% grade. You could climb any ...
by wesnewell
Apr 21 2018 1:00pm
Forum: E-Bike General Discussion
Topic: Bike Mileage
Replies: 7
Views: 368

Re: Bike Mileage

How much battery do I need? Watt Hours (wh) required per mile on flat terrain with no wind. MTB 20mph=21wh 30mph=40wh 40mph=66wh 50mph=103wh You can cut that in half or more with a recumbent bike/trike. You do the math as to what you need for your mileage. All this info and a lot more is in the Need...
by wesnewell
Apr 19 2018 8:24am
Forum: E-Bike General Discussion
Topic: Converting EV Global Motors SX 36v to LiPo
Replies: 10
Views: 421

Re: Converting EV Global Motors SX 36v to LiPo

Assuming the original controller was a 36V controller, you'll likely need a new 48V controller for a 14s lipo pack. As for charging, you'll probably want a new charger rated for a max 58.8V output for 14s lipo. Or, you could split the 14s back to 7s and charge them with a 24V charger as long as the ...
by wesnewell
Apr 18 2018 4:27pm
Forum: E-Bike General Discussion
Topic: Looking for people that own E-bikes
Replies: 42
Views: 1377

Re: Looking for people that own E-bikes

If you think ebikes have to be expensive, just look at my sig line.
by wesnewell
Apr 14 2018 2:43pm
Forum: E-Bike Technical
Topic: Controller and battery amps?
Replies: 39
Views: 1603

Re: Controller and battery amps?

I wouldn't have a clue about what type of batteries at all. I'm going to buy a battery just know 48v and the higher the amps the better. I hope. You got that right. My controllers are 40A and 60A. My battery packs are rated for 100A for one and 200A for the other. Your controller is rated for a max...
by wesnewell
Apr 14 2018 2:21pm
Forum: E-Bike General Discussion
Topic: Converting EV Global Motors SX 36v to LiPo
Replies: 10
Views: 421

Re: Converting EV Global Motors SX 36v to LiPo

Battery packs made with 12V sla batteries don't use a bms. I't s just three 12V batteries wired in series that are charged with a 36V charger. If that pack has a volt meter on it, you can use it but will probably be hard to see when riding. I'd assume the the cutoff voltage for a 36V sla system will...
by wesnewell
Apr 13 2018 1:08am
Forum: E-Bike General Discussion
Topic: Converting EV Global Motors SX 36v to LiPo
Replies: 10
Views: 421

Re: Converting EV Global Motors SX 36v to LiPo

You don't even need a new controller, assuming the one you have works. Just replace the sla batteries with a 10s lipo pack. Should easily fit where the sla 's are now. I'd assume you could even use the old charger although it will probably not give you full 42V charge.
by wesnewell
Apr 11 2018 8:18am
Forum: E-Bike General Discussion
Topic: Equipment to use with MXUS 3k Turbo
Replies: 9
Views: 795

Re: Equipment to use with MXUS 3k Turbo

How much battery do I need?
Nominal voltage times amp hours = wh
Watt Hours (wh) required per mile on flat terrain with no wind. MTB
20mph=21wh
30mph=40wh
40mph=66wh
50mph=103wh
You can cut that in half or more with a recumbent bike/trike. You do the math as to what you need for your mileage.
by wesnewell
Apr 10 2018 1:16pm
Forum: E-Bike General Discussion
Topic: Advice please
Replies: 25
Views: 998

Re: Advice please

Wesnewell, A DD hub motor kit on E-Bay , that I have seen you link to in the past was way more than 10 lbs more like close to 17-20 pounds . So that is what I have to go on. Surprised that you have one that is 10 pounds , since you have linked to heavier ones in the past, but then you are perhaps p...
by wesnewell
Apr 08 2018 12:08pm
Forum: E-Bike General Discussion
Topic: Advice please
Replies: 25
Views: 998

Re: Advice please

Why ? go with a heavy DD , when you can get the performance that you want and need for what you are doing with a lighter weight Mac. A DD hub motor weights what, no more than 5 lbs. more than a geared motor. Counting the overall weight, it's no more than a couple of percent more weight. With that, ...
by wesnewell
Apr 08 2018 1:02am
Forum: E-Bike General Discussion
Topic: Advice please
Replies: 25
Views: 998

Re: Advice please

roflmao, I'm 71. Almost 72. I wouldn't touch a geared motor. I want something more reliable than that, and none or more reliable than a DD hub motor.
by wesnewell
Apr 07 2018 6:59pm
Forum: E-Bike General Discussion
Topic: Advice please
Replies: 25
Views: 998

Re: Advice please

you can easily pedal a dd motor too, but it should never be required with a halfway decent setup. See Need Advice in sig.
by wesnewell
Apr 04 2018 10:00am
Forum: E-Bike Technical
Topic: DB25 solderless, how glue?
Replies: 6
Views: 462

Re: DB25 solderless, how glue?

First time I've seen a db25 with screw type terminals, but it wouldn't hurt to use a potting compound once all the wires are secure. Same for solder type.for added strain relief.
by wesnewell
Apr 02 2018 11:36am
Forum: E-Vehicles General Discussion
Topic: https://www.amperemotor.com/
Replies: 0
Views: 407

https://www.amperemotor.com/

Any thoughts on this? Anyone know any actual specs on it?
https://www.amperemotor.com/
by wesnewell
Mar 25 2018 9:18am
Forum: E-Bike General Discussion
Topic: comparing ebike kits
Replies: 20
Views: 1373

Re: comparing ebike kits

First of all, they're all Chinese hub kits and they're all basically the same. For $200 or less you can get a direct drive kit that should last many years. I've got 7 years and 25K+ miles on my 1000W kit. So yes, it's a waste of money to spend more than that for what you want. See Need Advice in sig.
by wesnewell
Mar 22 2018 12:57pm
Forum: E-Bike Technical
Topic: Wire gauge thickness?
Replies: 15
Views: 964

Re: Wire gauge thickness?

18awg will be fine up to 16A per pack in parallel. But if you pull that much you'll need 1awg main cables for the 192A load.
https://www.powerstream.com/Wire_Size.htm
by wesnewell
Mar 19 2018 4:15pm
Forum: E-Bike General Discussion
Topic: Battery and controller pairing question
Replies: 6
Views: 426

Re: Battery and controller pairing question

Get a battery that's rated for 10/20C or higher discharge and then not worry about it.
by wesnewell
Mar 11 2018 1:00pm
Forum: E-Bike General Discussion
Topic: City E-bike
Replies: 5
Views: 740

Re: City E-bike

That's a MXUS 3000W motor with a 48V 45A max (22A rated) controller. I've got a 4t v1 model and it's width is about 145mm, so make sure it will fit your bike. The speed you'll get will depend on which winding you get. It's made in 3t, 4t, 5t, and 6t, with the 3t being the fastest wind. I run a 96V c...
by wesnewell
Mar 09 2018 12:51am
Forum: E-Bike Technical
Topic: How much power can I pull from my lithium battery before BMS kicks in or things blow up?
Replies: 2
Views: 285

Re: How much power can I pull from my lithium battery before BMS kicks in or things blow up?

Specs on your battery pack say it uses 3C cells, so it's rated for 20x3 continuous, or 60A. States 150A peak discharge, but it doesn't say if that's peak for the battery pack or the bms, so your guess is as good as mine. I wouldn't want to draw more than 60A max from it though. If you're looking for...
by wesnewell
Mar 07 2018 2:06pm
Forum: E-Bike General Discussion
Topic: 48v bike
Replies: 3
Views: 322

Re: 48v bike

It's a brushless motor which means it needs a controller that will power the motor. As long as you use a controller that doesn't draw more amps than the battery is capable of, there's no reason it won't work. Just be aware that most lifepo4 batteries aren't capably of anywhere near the 190A rating f...
by wesnewell
Mar 06 2018 1:26am
Forum: E-Bike General Discussion
Topic: Want to change from SLA to lithium
Replies: 27
Views: 1165

Re: Want to change from SLA to lithium

The above video proves nothing more than anyone with the knowhow can start a lipo fire. It's not hard. Nor is it hard to get an SLA battery to explode, or an 18650 battery for that matter, Same goes for most any battery type made, including all the lithium batteries recommended in this thread. If yo...