Optimal Power Output for Lucid Connected Home Charging Station?

[Cuestix]

I've scanned the forums for this question, but didn't find it.

My Lucid CHCS is wired up for the full 80A draw and it's nice that I can charge to 80% from 20% in around 3 hours. My question is whether I really want to charge that quickly or whether it's better for the car and possibly more efficient to charge at a slower rate. I've noticed that the onboard cooling runs hard when I'm charging at 18kW on the Lucid EVSE, but barely runs when charging at a lower rate at a slow public charger. Sort of a two-part question...is it better for the battery life to slow the charge rate to 40A or 60A instead of 80A using the dip switches, and is it more energy efficient because the charging overhead is reduced? Doubling my charge time to 6 hours wouldn't be much of a problem 99% of the times I need to charge and I'm only a few minutes from a DCFC if I really need a quick boost.

 

[segbrk]

Is it technically better to charge slower? Probably. Is it better enough to warrant a second thought? Probably not. Even if you fast charge at 300+ kW twice a day, your battery warranty guarantees at least 70% capacity retention after 8 years. Knowing warranties, that's very conservative and short of an actual failure, we should see much less capacity loss than that. 10+ year old / 200,000+ mile Teslas have seen less than 10% capacity loss. Don't sweat it, just drive it.

 

[borski]

There is no effective difference between charging at 30A and 80A in terms of the a life of the battery. (For the pedants out there, I don’t mind there’s no difference at all; just that it is so minor it may as well not exist)

DC fast charging is a different story.

 

[illopp00]

For a comparison, a 3 ton home HVAC AC compressor uses about 40A (~4Kw), so it's more about home much you want to draw from your main electrical supply and can you run them both at the same time?

 

[lucidtouringman]

Thread 'Helpful Tip While Charging-Fan Noise'

Oct 27, 2024

I hope this post helps some out there ... So while charging at home at about 11kwh the battery cooling fan would inevitably turn on and stay on making it fairly loud. I just got used to it over the 1.5yeara I've had the car. Today while my car was charging, I was playing with my Chargepoint charger settings in the app and decided that I don't necessarily need a short charging time when I start charging at 8:00 p.m. and I just wanted to prolong my charging time from say 2.5hrs to about 6hrs..approx numbers .. so I reduced the amps from my charger from 48 amps to 28 amps and in about 5...

• lucidtouringman
• Replies: 0
• Forum: Charging

• 

I recently posted about the same thing...my cars cooling fan stays off at about 30A charging and takes almost twice as long so I've certainly set my charging up to be slower than what is possible with my setup, but the only change that I enjoy is the loud fans staying off. Other than that, I don't believe I'm getting any appreciable extension in my battery life to worry about.