Author Topic: Charging rate at 2.5kW  (Read 325 times)

shayan

  • Enertia Master
  • ***
  • Posts: 43
    • View Profile
    • Email
Charging rate at 2.5kW
« on: October 25, 2016, 05:35:51 PM »
Any idea why it maxes out at 2.5kW (24A) when the charger is rated at 3kW on a level 2 station? Its pretty cool out here too and i've been experimenting with charging when the batteries are cool or warm but i see the same max charge rate. Thoughts?

protomech

  • Brammovangelist
  • *****
  • Posts: 1985
    • View Profile
    • ProtoBlog
Re: Charging rate at 2.5kW
« Reply #1 on: November 09, 2016, 10:08:25 PM »
Most chargers have an inflection point. Below that point they are current-limited. Above that point they are power-limited, and will derate current to maintain a fixed power level.

A 24A current limit (DC) means that the actual charge power varies from 2.2 kW (@ 90V, nearly dead) up to about 2.8 kW (@ 115V, nearly full) - that is, the current remains fixed but the voltage rises.
1999 Honda VFR800i | 2014 Zero SR
Check out who's near you on frodus's EV owner map!
http://protomech.wordpress.com/

shayan

  • Enertia Master
  • ***
  • Posts: 43
    • View Profile
    • Email
Re: Charging rate at 2.5kW
« Reply #2 on: November 10, 2016, 09:47:08 PM »
Got it. Thanks for the info! I do see it switching between 2.3kW to 2.5kW. So it hasnt crossed the inflection point yet.