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Well long before a lithium upgrade, I think that an upgrade to a solid state controller is needed. The reason the Fatboy has dual 10 guage is it's lighter than significantly larger wires, and being that it is designed to make a 50+ pound thing fly 100+mph vertical, weight is an issue.
My scooter pulls a peak of around 3700 watts accelerating up the steepest hill around and that is well....fun lol, the wires is 10 guage, and yes, it does get warm doing that. 36+ volts@3700+ watts=100+ amps going through 10 gauge wire and connectors rated at 80 amps.
Unrelated, while also related:
1) What would you suggest for a solid state controller? (Don't have lots of money, but want it to be reliable.)
2) What would you suggest for a lithium pack/balancer/charger when going that route?
3) If you had a lithium pack, what would you do to incorporate solar charging? There are 48v lead acid solar chargers, but I don't know of any 72v solar chargers especially not for lithium. What solar panel? 6 (or 3) small 12 (or 24) volt ones or are there any 72 volt ones?
4) How many amp hour (ah) is the 48v pack in the citicar (supposed) to be to provide the supposed 50 mile range which no one will realistically hit with lead acid?
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