tangentdave
1 kW
I'd recommend 16-20Ah of Multistar LiPo's for the full 120A current (16Ah is pushing it on the small side). Don't draw huge current below 3.5V per cell. Other, higher quality LiPo's may be able to handle the current at a lower state of charge. Balance the pack every chance you get, preferably install a BMS as the cheap LiPo cells will fall out of balance quickly.
For 18650 packs in the USA, I've been referring people to Patrick at Hi-C Battery (hicbattery@gmail.com; http://www.hicbattery.com/). A little more expensive but a very nice pack. Patrick built me a 14s8p with 30q, very acceptable size:
Pack on left is from Hi-C, 14s8p of 30q, 23Ah measured, 120A continuous, 12.5lbs. Pack on right is China, 14s8p of 25r, 150A continuous, 14lbs. For customers in Australia/NZ, I think I've talked E-max Ebikes (https://www.emax-ebikes.com.au/) into building a 14s8p pack using HG2 for us (160A/24Ah). Yes, it'd be nice to not push these packs to their limit, but carrying more weight (cells) is counterproductive.
I'll get a weight measurement of all the components soon as I can.
There is a little confustion about the 'upgrade' vs 'new' units, my fault since I'm still waiting for the first rotor/stator to be delivered otherwise there'd be pics of the 'new' unit. Unless specially requested, all kits will have the stator bonded to the Tangent housing making a one-piece motor/reducer. If you already have a 32xx engine, the water jacket version would save you the cost of a new Astro engine (I just pass the cost through). Any new kits will not require the addition of water within the housing.
-dave
For 18650 packs in the USA, I've been referring people to Patrick at Hi-C Battery (hicbattery@gmail.com; http://www.hicbattery.com/). A little more expensive but a very nice pack. Patrick built me a 14s8p with 30q, very acceptable size:
Pack on left is from Hi-C, 14s8p of 30q, 23Ah measured, 120A continuous, 12.5lbs. Pack on right is China, 14s8p of 25r, 150A continuous, 14lbs. For customers in Australia/NZ, I think I've talked E-max Ebikes (https://www.emax-ebikes.com.au/) into building a 14s8p pack using HG2 for us (160A/24Ah). Yes, it'd be nice to not push these packs to their limit, but carrying more weight (cells) is counterproductive.
I'll get a weight measurement of all the components soon as I can.
There is a little confustion about the 'upgrade' vs 'new' units, my fault since I'm still waiting for the first rotor/stator to be delivered otherwise there'd be pics of the 'new' unit. Unless specially requested, all kits will have the stator bonded to the Tangent housing making a one-piece motor/reducer. If you already have a 32xx engine, the water jacket version would save you the cost of a new Astro engine (I just pass the cost through). Any new kits will not require the addition of water within the housing.
-dave