Came home early because of low power. I forgot to charge the batteries today. I didn't actually run out of power but when the batteries get below 49 volts you cannot accelerate very well without stalling.
What does stalling mean in the context of electrical power? Upon accelerating there is always voltage sag. (about 14 volts on maximum acceleration, I have found with my particular 2 battery setup) So if my battery's no-load voltage is below 50 volts the voltage will sag to below 40 volts on max acceleration. Then the BMS (battery management system) will shut down the batteries to prevent damage.
NOTE: The voltage sag is not as severe when I'm running a 3 battery setup.
The batteries will recover after a few seconds but it is a very inconvenient thing when this happens when you try to accelerate from a standing start (such as when the light turns green) It is not just embarrassing but can be dangerous if you are not careful).
Temp 13.8 C
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