Chargepoint Home Flex at 48A?

[MachEnthusiast]

Hey everyone. Just a quick question about the Chargepoint Home Flex (hardwired version). The page for the EVSE has the following specifications:

AC Power Output Rating
Maximum 12 kW (240V AC * 50A). Output amperage adjustable via mobile app to 16A, 24A, 32A, 40A, 48A, 50A.

AC Power Input Rating
208/240V AC 60 Hz single phase @ 16A, 24A, 32A, 40A, 48A, 50A

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My question is simple: how can it output 48A if it can't input 60A? With the 80% rule wouldn't it have to have 60A in to provide the 48A out?

I want this EVSE because it looks like I could eventually re-wire it to be a NACS cable down the road if I get another EV (which I may). And I know J1772 is being phased out in favor of NACS.

But if my Mustang can't draw the full 48A it craves from this, I may look elsewhere.

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[E90alex]

The input amperage (the maximum amount it will pull from the wall) is not the same as the breaker size. The breaker size should be 125% of the input amperage.

Being that the EVSE is essentially just a fancy relay to just pass through the electricity and doesn't manipulate the voltage or current, the input and output ratings are the same.

So yes, it can supply 48A provided you have it hardwired to a properly sized wire for 60A and a 60A breaker.

 

[MachEnthusiast]

The input amperage (the maximum amount it will pull from the wall) is not the same as the breaker size. The breaker size should be 125% of the input amperage.

Being that the EVSE is essentially just a fancy relay to just pass through the electricity and doesn't manipulate the voltage or current, the input and output ratings are the same.

So yes, it can supply 48A provided you have it hardwired to a properly sized wire for 60A and a 60A breaker.

Thanks for clarifying that.

 

[Mach-Lee]

50A output requires a 65A circuit or larger. But it’s sort of pointless because I don’t know of any cars that have a 50A charger, most are 48A. So most people will just install it with a 60A circuit.

You would need a car with a 80A charger to see the benefit of the extra two amps.

 

[DeusEx]

Hey everyone. Just a quick question about the Chargepoint Home Flex (hardwired version). The page for the EVSE has the following specifications:

AC Power Output Rating
Maximum 12 kW (240V AC * 50A). Output amperage adjustable via mobile app to 16A, 24A, 32A, 40A, 48A, 50A.

AC Power Input Rating
208/240V AC 60 Hz single phase @ 16A, 24A, 32A, 40A, 48A, 50A

-----------

My question is simple: how can it output 48A if it can't input 60A? With the 80% rule wouldn't it have to have 60A in to provide the 48A out?

I want this EVSE because it looks like I could eventually re-wire it to be a NACS cable down the road if I get another EV (which I may). And I know J1772 is being phased out in favor of NACS.

But if my Mustang can't draw the full 48A it craves from this, I may look elsewhere.

If you can, I'd suggest looking for a few other brands.

An update recently killed the wifi in my hardwired Chargepoint EVSE and needed me to get an RMA. I was not happy especially since I had it for less than a year. A quick search indicates that wifi dying is a common problem, which I wished I knew earlier. If you don't have wifi, there are no smart features, and you can't change the amperage of the EVSE.

If my Chargepoint Home Flex dies, l would likely get an Emporia branded one next.

 

[MachEnthusiast]

If you can, I'd suggest looking for a few other brands.

An update recently killed the wifi in my hardwired Chargepoint EVSE and needed me to get an RMA. I was not happy especially since I had it for less than a year. A quick search indicates that wifi dying is a common problem, which I wished I knew earlier. If you don't have wifi, there are no smart features, and you can't change the amperage of the EVSE.

If my Chargepoint Home Flex dies, l would likely get an Emporia branded one next.

how often do you change the amperage? I would set it to output 48A one time and never mess with it again, personally.

 

[DeusEx]

At least once or twice a month depending on how often I need to charge.

I'll drop to 8A at least once a month for a long charging session to charge the 12v battery since I do mostly local driving (less than 8 miles daily). When I need to charge quickly, I'm at 40A. In the winter, I'll do 48A since the cable gets too warm for me in the summer sun.

Also, there an issue with the software right now where the app is not reporting the correct network IP and MAC address but somehow is still connected to the internet. The issue has been ongoing since at least April or May from what I have seen.

 

[AZBill]

I have had two ChargePoints fail, both were about 4 years old. I now have two Autel units and they have a much better app and can power share via Wi-Fi.

As far as changing to NACS, you could replace the cable on the Autel just as easy as the CP.

 

[MachEnthusiast]

I also want to get a rebate. My electrical company offers rebates only on the following models.

 

[highland58]

My CP home flex died after 5 years, it no longer charges either EV. The green light on the charger never goes to blue, the lights behind the charge door never go to blinking blue. I got on the phone with CP and tried some things, but nothing works. I have now ordered a new CP with a $300 rebate from my utility, using the mobile charger meanwhile. I maybe should have gotten the emporia pro, but this way I am replacing with the same setup so no changes to how it is mounted and connected.

 

[Nitepony986]

If you can, I'd suggest looking for a few other brands.

An update recently killed the wifi in my hardwired Chargepoint EVSE and needed me to get an RMA. I was not happy especially since I had it for less than a year. A quick search indicates that wifi dying is a common problem, which I wished I knew earlier. If you don't have wifi, there are no smart features, and you can't change the amperage of the EVSE.

If my Chargepoint Home Flex dies, l would likely get an Emporia branded one next.

This happened to me too, and I haven’t been able to figure it out! Guess I’m looking at the RMA route too - only 14 months old.

 

[DeusEx]

Wifi eventually started working again on its own. I think I had left the EVSE turned off from the breaker for a number of days before turning it back on for a charge. However, at that point I had received my replacement and had the electrician install scheduled so I still went ahead and replaced it.

There are a handful or less reports of people having similar results when leaving it off for an extended period of time so you may want to give that a try too.

 

[Lonesparrow67]

I just had this happen 2 weeks ago....
Pulled into my driveay and noticed the light on the charger was solid white, not green, indicating wifi was not connected...

Tried everything I could imagine, but it would not recognize any wifi networks at all....

The only thing I could think of, that could have triggered it, was I noticed the time in the Chargepoint app, based on my most recent charging session, was exactly 1 hour off, almost like it wasn't recongizing Daylight Savings Time, based on my home location.....

I attempted a charger reset, within the Chargepoint app.....this was the day before I noticed the issue...

Anyways, based on what I had seen from other posts, some suggested waiting a while, turning the charger back on, and then it worked again...

So I was leaving town for work, turned the charger off at the breaker before I left, returned home 5 days later, turned the breaker back on, and after a few moments, the charger connected just fine to my wifi network, and the light turned green...

It's been acting just fine now for going on 2 weeks....

Some have suggested a firmware issue within the charger, that Chargepoint is unable/unwilling to acknowledge, with some replacing the charger under warranty, while others discovering that it may be unessecary to do so.....

 

[Tampamike]

Just had this issue with my HomeFlex - charging last night, I noticed that it only charged at 3.8 kw instead of the usual 9. Hadn’t changed any settings and it still shows correct settings for 40 amp charging. Anybody seen this happen?

 

[DeusEx]

Just had this issue with my HomeFlex - charging last night, I noticed that it only charged at 3.8 kw instead of the usual 9. Hadn’t changed any settings and it still shows correct settings for 40 amp charging. Anybody seen this happen?

See this thread. https://www.macheforum.com/site/threads/what-happened-to-my-charge-rate.49543/

Seems that a restart of the EVSE or a call to Chargepoint should fix the issue.

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