Comparing 36v 250w to 500w Hub Motors

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electriker
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Comparing 36v 250w to 500w Hub Motors

Post by electriker » Wed, 20 Jun 2012, 18:27

One of the mods I had done to the green trike was to have a torque stay anchor welded to the rear fork. Prior to that time I'd simply used a metal hose clamp around the torque stay and the fork, wrapped in rubber padding and duct tape to stop scratching the paint. This lasted for several years with no problems at all.

Joe

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Johny
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Comparing 36v 250w to 500w Hub Motors

Post by Johny » Wed, 20 Jun 2012, 18:30

250W Solar Panel
1642 x 979 x 38mm
Max Power: 8.23A @ 30.4V

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Comparing 36v 250w to 500w Hub Motors

Post by chopper_elec » Wed, 20 Jun 2012, 18:38

electriker wrote: One of the mods I had done to the green trike was to have a torque stay anchor welded to the rear fork. Prior to that time I'd simply used a metal hose clamp around the torque stay and the fork, wrapped in rubber padding and duct tape to stop scratching the paint. This lasted for several years with no problems at all.

Joe


Thanks for that. I'm likely to do the same thing by wrapping up the panel with duct tape and some rubber padding. Is dropouts on the axle similar to one of those "better safe than sorry" which is similar to the warnings behind Lipo batteries? I'll be able to mount the torque arm pretty easily to the front fork which should be good. With 48v and 500w it shouldn't be too bad.
Johny wrote: 250W Solar Panel
1642 x 979 x 38mm
Max Power: 8.23A @ 30.4V


Thats a pretty decent panel but doable haha. The infinitely running 250w motor. Technically the motor would pull more at times so there would be some downtime but even if you were pedalling half that time its pretty impressive.

The only problem there is the width. I would love to make a V shape out of 2 smaller panels to get closer to that magical 250w number

I was also wondering how much a panel like that would set me back?

electriker
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Comparing 36v 250w to 500w Hub Motors

Post by electriker » Wed, 20 Jun 2012, 19:08

I was also wondering how much a panel like that would set me back?


If you live in Perth here's a nice place to go.

https://www.12volt.com.au/redirect.html ... rpage.html

You can get some prices there.

My first portable set up I had the "V" shape to try and minimise width but I soon worked out that even if I flattened them out they were still not as wide as my body, and I was not getting the maximum solar incidence.

Image

This pic shows clearly the batteries in the blue box up behind my head. Not good for handling.

Joe

electriker
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Comparing 36v 250w to 500w Hub Motors

Post by electriker » Wed, 20 Jun 2012, 19:17

To give you very rough idea of the area of panel required, each of the small flexible panels on my array is nominally 12 volts (no load) and 2.68 watts. Under load they were rated at about 8 volts. Allowing for losses etc, I reckoned they were putting out about 2 watts each. So imagine 100 of those small panels to theoretically achieve 200 watts.
Image
Joe

There are 16 panels on the free standing array.
Last edited by electriker on Wed, 20 Jun 2012, 09:19, edited 1 time in total.

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Comparing 36v 250w to 500w Hub Motors

Post by chopper_elec » Wed, 20 Jun 2012, 19:53

Oh dear. That is a lot indeed. hahaha. Imagine the wiring associated with it. I was thinking of linking up a few bicycle trailers (similar to a road truck/train) haha.

electriker
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Comparing 36v 250w to 500w Hub Motors

Post by electriker » Wed, 20 Jun 2012, 20:00

But it has been done ... around the world. Image

Image

Joe

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