Just had my electrician put in a 100 amp circuit and install my HPWC. plugged it in and cannot get the car to charge above 40. I manually moved it to 80 and it immediately bumped back down to 40. anybody got some ideas?
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Just had my electrician put in a 100 amp circuit and install my HPWC. plugged it in and cannot get the car to charge above 40. I manually moved it to 80 and it immediately bumped back down to 40. anybody got some ideas?
Twin chargers and supercharging are unrelated options.Never quite understood the twin charger thing, but yes I did buy that option. So - that said - I'll give them a call in the morning… Although I have successfully used the superchargers...
Thanks MitchL, Banahogg and Clmazin! I was ignorant enough to think my electrician would read directions… I had unrealistically left the work up to the guy who charged me $2500 to run the line and install the charger… He had not read or tested. I took it apart, read the directions, and now it works. Just hope it stays at the 80 I set (keep hearing people have trouble making it stay at 80…).
Had the install recently and two things to note:Was the problem the DIP switches? Did you have a difficult installation? Had my HPWC installed today with a new sub panel plus permit and my cost was $940.
The problem is blowing fuses when running at 80, from what I've heard/read. Run at 60 is safer, especially if a long run of wiring with an electrician you don't exactly trust now.Thanks MitchL, Banahogg and Clmazin! I was ignorant enough to think my electrician would read directions… I had unrealistically left the work up to the guy who charged me $2500 to run the line and install the charger… He had not read or tested. I took it apart, read the directions, and now it works. Just hope it stays at the 80 I set (keep hearing people have trouble making it stay at 80…).
Do you mean this report on Roadster charging rates and efficiency? I would expect the best efficiency at the highest charge rate, although for the Roadster there's not much difference between 32A and 70A. (I attribute the small differences in that range mostly to measurement error/random variation.) It's just the lower charge rates that have noticeably lower efficiency.I'm running at 60A because I expected better charging efficiency based on Roadster reports (complete WAG on my part).
Twin chargers and supercharging are unrelated options.
What's the 6th digit in your VIN? A, B, C, or D?
5YJSA1_
I'm guessing C.
Was the problem the DIP switches? Did you have a difficult installation? Had my HPWC installed today with a new sub panel plus permit and my cost was $940.
Don't forget that continuous loads (more than 3 hours) require a derate to 80%.By the way, since the line I ran is for 100A, I set the DIP switches for 100. The car is charging at 60A.
Sorry, didn't mean to be cryptic but forgot to post the link.5yJSA1D
Why?
WHat does that mean?
Don't forget that continuous loads (more than 3 hours) require a derate to 80%.
If you have a "standard" 100A branch circuit you want to use for an EV, do you have to replace the breaker with an 80A to properly protect the circuit? If you then set the dipswitches to 80A, will you risk unwanted breaker tripping, or is the current draw slightly less to avoid inadvertent trips? (Don't know how breakers handle continuous loads right at the rated amperage.)The HPWC handles this in that the DIP switches are set to the branch circuit size (max 100A).
Technical note: it's not a de-rate to 80%, but rather an oversize to 125% (210.19(A)(1)). Same result for a single calculation, but it can affect math calculations if you have to apply other de-rating later. Also, article 625 throws out the 3 hour criteria for continuous loads and declares that all EV charging loads are continuous regardless of timeframe.
If you have a "standard" 100A branch circuit you want to use for an EV, do you have to replace the breaker with an 80A to properly protect the circuit? If you then set the dipswitches to 80A, will you risk unwanted breaker tripping, or is the current draw slightly less to avoid inadvertent trips? (Don't know how breakers handle continuous loads right at the rated amperage.)
I guess I was confused by the mention of dipswitch settings of 100A. So the HPWC can be set to 100A, but the system is legal since the car can only draw 80A?No. Breaker, conductors, and terminals/lugs must be rated for 125% (100A) of continuous load, which is 80A max on Model S.
That installation manual is a bit lacking. Perhaps I don't understand the dipswitches. Do they set the maximum output, or do they set a derated output based on the input circuit?Hand your electrician the HPWC installation guide, it's very short and has the short-n-sweet information she/he will need.
I guess I was confused by the mention of dipswitch settings of 100A. So the HPWC can be set to 100A, but the system is legal since the car can only draw 80A?
updated
That installation manual is a bit lacking. Perhaps I don't understand the dipswitches. Do they set the maximum output, or do they set a derated output based on the input circuit?