>>1888773True, yet inaccurate
Speed is not the culprit; acceleration is.
Note that since we're talking about a self-balancing vehicle, "slightly steep uphill" means more power is required to keep the same speed.
Keeping 20mph speed requires less current than accelerating from 19 to 20mph.
Keeping 20mph uphill requires extra power because "inclined plane" physics (m·g·sin x, etc)
Add in the battery characteristics:
- power output goes down with charge level
- power output is sub-optimal below 23°C or above 30°C (usually 40% at -10°C)
- capacity slowly decays with the number of charge cycles, stress applied, discharge history, etc
A good EUC project continuously recalculates the discharge curve to always keep some "reserve power"
Finally, most EUC's are Chink-made, literally.
They claim "126V battery", it's actually 108V nominal, 126 theoretical, 123-124V if optimally slowly fully charged at room temperature and brand new. (And that's Inmotion, the most reputable and reliable one)
They claim "3300 watts motor", at room temperature and for no more than 90 seconds.
They claim "4000 watts peak power", at room temperature and for no more than 2 seconds (and only if the battery is around 100% charge level).
They claim "136V battery", it's actually four packs of 8s4p (29V nominal, 33.6V theoretical maximum, rounded to 34V) in series (34V×4 = 136V), and, worse, the 8s4p is allowed to discharge up to 24V (3V per cell), whereas other manufacturers keep the "zeropercent" at around 3.4V per cell
You're literally in for nasty surprises, as long as you buy Begode
>>1888831>>1888825EUCs feature DC motors having stator and rotor in series. That is, reversing the polarity makes them generators (consume mechanical energy to produce electricity). Braking actually charges your battery. You can go uphill, arrive on top of the mountain with 9% battery left and still get safely home because most of the downhill braking charged the battery enough.
Source: did this many times
