Dear TMC,
What is the right thing to do with the DIP switch settings on an older HPWC to achieve 72A charging for a new P100DL?
Details:
Appropriate gauge wiring (in a trench) from basement main panel to garage -- 100A capable, protected with 100A breaker
Sub-panel in garage
Circuit from sub-panel to HPWC, protected with an 80A breaker
HPWC is what I think of as a first-generation or maybe 1.5 HPWC, with DIP switches to select breaker setting
I have set the HPWC to the 80A breaker setting (page 12 of its manual)
Result: car achieves 64A charging but refuses to go beyond 64
Note: I never tried this with my 2013 P85+, for which I only had a 40A charging circuit. But now that I've got the P100D, and even though its dual chargers only achieve 72A rather than the full 80A of my older car, I'd like to get every last charging droplet
I am thinking that the car automatically limits itself to 80% of the selected breaker setting.
I thought about changing the sub-panel's breaker to be 100A instead of 80A... but I've already got a 100A breaker set on the main panel for this one circuit to the garage.
Is it reasonable instead to set the HPWC DIP switches for a 90A breaker? 80% of that is 72A, which is what the car will draw sustained. And then I've got the 100A breaker on the main panel to back that up.
Or is there a better / more appropriate / safer way?
Thanks,
Alan
What is the right thing to do with the DIP switch settings on an older HPWC to achieve 72A charging for a new P100DL?
Details:
Appropriate gauge wiring (in a trench) from basement main panel to garage -- 100A capable, protected with 100A breaker
Sub-panel in garage
Circuit from sub-panel to HPWC, protected with an 80A breaker
HPWC is what I think of as a first-generation or maybe 1.5 HPWC, with DIP switches to select breaker setting
I have set the HPWC to the 80A breaker setting (page 12 of its manual)
Result: car achieves 64A charging but refuses to go beyond 64
Note: I never tried this with my 2013 P85+, for which I only had a 40A charging circuit. But now that I've got the P100D, and even though its dual chargers only achieve 72A rather than the full 80A of my older car, I'd like to get every last charging droplet
I am thinking that the car automatically limits itself to 80% of the selected breaker setting.
I thought about changing the sub-panel's breaker to be 100A instead of 80A... but I've already got a 100A breaker set on the main panel for this one circuit to the garage.
Is it reasonable instead to set the HPWC DIP switches for a 90A breaker? 80% of that is 72A, which is what the car will draw sustained. And then I've got the 100A breaker on the main panel to back that up.
Or is there a better / more appropriate / safer way?
Thanks,
Alan