Exactly what I had to do on my Q0 panel at home. I ran out of spaces. So I bought a few twin aka tandem breakers to free up a few slots so I could install a 40 amp double pole breaker for the EVSE.jjeff wrote:I don't believe the Square D QO panels support 240v single slot breakers, none of the slots. As said before, you can use what they describe as single pole tandem breakers, which again will free up space in your panel to allow you to use the double slot dual pole or 240v breakers.
Not sure if this search results link will work but if not I simply searched amazon for "QO breakers" and up popped up what I ended up with.
https://www.amazon.com/s/ref=nb_sb_ss_c ... C0EXGGJ692
Interesting note about the temperature sensor! Thanks for that. Does anybody know more about this? I have been reading posts suggesting a Level 1 charger can be a fire hazard. Does this feature of the 2018 L1/L2 combo EVSE mean that level 1 charging from a standard outlet (a NEMA 5-15 120V) is "safe". I use quote marks as I gather safety is relative to one's personal electrical set-up. A slower charge or a shut down with a fault is unfortunate but something that can be dealt with. A garage fire is a much bigger issue. I'll take a look through the manual and see what I can learn.MikeD wrote: [A Tesla Poster MikeD found wrote:] "If you search this forum for melted UMC connectors, you may have your answer to your question ["New UMC 14/50 limited to 32 amps... WHY?!"] on the power reduction. The previous generation of UMC was designed in such a way with the removable plugs that you could get a poor connection. Coupled with a 40 amp output, that was a recipe for overheating. How many times were the plugs recalled and redesigned? Twice? That's some serious liability to sell a product that has heating/melting issues like that...I haven't seen the new generation unit yet, but I'm betting it runs cooler, and isn't prone to coming out of the wall receptacle as easy, etc... ".
I believe Nissan has avoided these issues with its portable EVSE designs, especially by apparently including a mechanism for detecting excessive temperature at the input plug and automatically reducing its EVSE's maximum current draw and/or shutting down with an appropriate light fault code. This is a major reason for my recommending only unaltered Nissan portable EVSEs for 2018 Leaf buyers who want just an L1 to carry with them.