Brammo Owners Forum

Brammo Empulse Discussion => Brammo Empulse => Topic started by: shayan on October 25, 2016, 05:35:51 PM

Title: Charging rate at 2.5kW
Post by: shayan 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?

Title: Re: Charging rate at 2.5kW
Post by: protomech 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.

Title: Re: Charging rate at 2.5kW
Post by: shayan 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.