Cycleway town
Join Date: Jul 2014
Location: Milton Keynes, England
Posts: 1,402
Bikes: 2.6kw GT LTS e-tandem, 250w Voodoo, 250w solar recumbent trike, 3-speed shopper, Merlin ol/skl mtb, 80cc Ellswick
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 569 Post(s)
Your top speed won't change, as your controller governs that. The motor itself can give higher speed with more volts, but running a 48v system could burn it out fast if it's not engineered for it.
A bigger capacity 36v battery will mean you can hit your current high speeds for longer, without it cutting out and having to use lower speeds for range.
The bigger the capacity, the more amps your battery can give without there being too much stress on it.