green79
10 mW
First time poster, thanks for all the great information here I've learnt a lot on this forum!
I'm about to put an e-assist and thought I would seek some advice on battery choices. The build is a 24" wheel Surly Big Dummy. I'm looking at an eZee rear hub, 20A Grinfineon controller, 12 pole PAS with a CA V3. I'm not looking at going fast on this as it is a two kid hauler and primarily for dealing with big Seattle hills. I am considering two battery choices:
1. em3ev 50V 12.3Ah Triangle pack in a custom frame bag in the small rear triangle behind the seat tube. Like in this link: http://thelazyrando.wordpress.com/2010/12/01/surly-big-dummy-frame-bag-2/
2. em3ev 36V Samsung Frame pack, 16.5Ah.
The range is about the same (600 watt hours).
The pros of the triangle pack: uses space that I otherwise would not use. It would also have the weight nice and low and centered. I think the controller would also fit in the frame bag. With the frame bag and rear bags hiding the hub motor it would just look like a normal cargo bike. The cons are I can't lock it and it is a bit more expensive than option 2.
The advantage of option 2 are the locking, removable battery case but I lose the front triangle space for water bottles etc. Sadly I can't fit the battery in the rear triangle (I have a 16" frame and the case also rubs against the chain). Weight is slightly higher up but also more to the front to balance the hub motor so weight distribution might be a wash
My questions to are:
Any other considerations I am missing?
Any advice either way?
Any suggestions on ways to lock the triangle battery/frame bag?
I'm about to put an e-assist and thought I would seek some advice on battery choices. The build is a 24" wheel Surly Big Dummy. I'm looking at an eZee rear hub, 20A Grinfineon controller, 12 pole PAS with a CA V3. I'm not looking at going fast on this as it is a two kid hauler and primarily for dealing with big Seattle hills. I am considering two battery choices:
1. em3ev 50V 12.3Ah Triangle pack in a custom frame bag in the small rear triangle behind the seat tube. Like in this link: http://thelazyrando.wordpress.com/2010/12/01/surly-big-dummy-frame-bag-2/
2. em3ev 36V Samsung Frame pack, 16.5Ah.
The range is about the same (600 watt hours).
The pros of the triangle pack: uses space that I otherwise would not use. It would also have the weight nice and low and centered. I think the controller would also fit in the frame bag. With the frame bag and rear bags hiding the hub motor it would just look like a normal cargo bike. The cons are I can't lock it and it is a bit more expensive than option 2.
The advantage of option 2 are the locking, removable battery case but I lose the front triangle space for water bottles etc. Sadly I can't fit the battery in the rear triangle (I have a 16" frame and the case also rubs against the chain). Weight is slightly higher up but also more to the front to balance the hub motor so weight distribution might be a wash
My questions to are:
Any other considerations I am missing?
Any advice either way?
Any suggestions on ways to lock the triangle battery/frame bag?