Power sharing already works at tesla SC. You only charge at the max rate for the first 10 minutes so unless both cars plug in at the same time it is a minimal delay. However there are many other reasons besides power sharing that cause chargers to provide reduced power. EVGO probably was reduced for a reason other than power sharing unless you noticed an immediate drop when the neighbor car plugged in. It can change from day to day even on the same charger

 

Yeah noticed the same issue at tesla supercharger when ever I am use the same charger with someone else. Out of spec does a good job true to educate everyone on how to choose a dispenser that's not sharing power


Stu the issue was most likely simply power sharing as well at EVGO as 2 chargers were powering 4 vehicles. Charger wasn't be Throttled like Electrify America does.

Its the evgo almost brand new in Roseville Mn.Great location . I'll keep track ..perhaps not enough power available with all the other business in the area running as well ...not likely considering all the power plants we have including nuke plants

EVGO naturally blames the vehicles


The screen below shows an example of shared session where both Connector A and Connector B are in use and they’re each delivering ~45kW (even though 175kW is available to each).

Note: Power delivered means how much power is actually going from the charger into the vehicle…available power is how much power the charger is able to deliver to the vehicle. If the power delivered is less than the available power of the charger, the vehicle’s battery is the constraint.

 

To be honest, nothing can use the full 350kW at the moment. The eGMP tops out at 230-240kW and drops below 200kW early enough that you can charge an ID.4 at peak speeds on the unused capacity. A car nearing completion can absolutely share a 350kW cabinet with another car with little to no impact.

Improving utilization of the hardware helps keeps the install costs manageable. It also makes it easier to deploy more dispensers and get more people charged with the same grid connections. Sharing power isn’t a bad way to do it, as Tesla themselves demonstrates. The issues you mention here are orthogonal to power sharing.

I’d wager that people would be happier knowing they are plugged in and charging, even if they wait a little longer. The alternative is waiting in line and dealing with the stress of folks jumping the line, dealing with other stressed out folks, etc.

If I was in charge of the EA deployment plan, everything would have been 350kW shared dispensers from the start. A 4 dispenser location with 2 350kW stalls can be 6 dispensers with the same power cabinets feeding them. 8 dispensers with only one extra cabinet. And no need to do the dance of “don’t take the 350kW dispenser if you don’t have a car that can take advantage”.