Tonyt
Posts: 61
Joined: Thu Apr 02, 2015 1:36 pm
Delivery Date: 30 May 2011
Location: OC California

Re: OpenEVSE suppott

Sun Dec 23, 2018 11:28 pm

GlennD wrote:I am sorry. The wife of one of my customers Dropped off a unit for repair.

I am suffering from a bad cold and it may be several days before I get to it. Right now I feel too rotten to work.
I dont think this was intended for me? I dont have any issues with mine. When I said I tinker with it I added wifi, maybe do some additional upgrades in the future.

Glenn, your service has been A+++

Is there any good 100 amp cables and contactors?

GlennD
Forum Supporter
Posts: 1493
Joined: Sun Dec 18, 2011 7:14 pm
Delivery Date: 20 May 2013
Leaf Number: 410357
Location: Anaheim

Re: OpenEVSE suppott

Mon Dec 24, 2018 12:52 pm

The spec maxes out at 80A. I think Quick Charge Power sells one. A 90A contactors are Available. Most have either a 24V coil or a 240V coil. The current version of OpenEVSE supports the 240 coil directly. I use a small 12V relay for the job. I do not think 100A is feasible sincei it is beyond the spec and there is no support for it.

Most cars max out at 30A. Tesla based cars like my B can use 40A. A dual charger Tesla will charge at 80A, An enhanced Leaf charges at 27,5A @240V. I know of no cars that charge at 100A. Remember the car sets the current as long as there is enough.
Last edited by GlennD on Wed Dec 26, 2018 6:42 pm, edited 1 time in total.
:
2013 Pearl White SL Premium
Traded for a Cirrus White 2014 Mercedes B (totaled)
2016 Urano Gray eGolf SEL w/ drive assist
Loved the VW but it sat too low for my old body
Back to a Cirrus White 2017 B250e
White Ioniq limited.It sits just fine

Tonyt
Posts: 61
Joined: Thu Apr 02, 2015 1:36 pm
Delivery Date: 30 May 2011
Location: OC California

Re: OpenEVSE support

Wed Dec 26, 2018 10:06 am

Thanks I'll check them out. I recently purchased a dual charger (80A) tesla and though about upgrading my unit. However there are some HPC's that are too bad in price and might be easier to just pick up one. I thought I needed a 100A contactor to support a 80A continuous load?

GlennD
Forum Supporter
Posts: 1493
Joined: Sun Dec 18, 2011 7:14 pm
Delivery Date: 20 May 2013
Leaf Number: 410357
Location: Anaheim

Re: OpenEVSE support

Wed Dec 26, 2018 4:43 pm

That is the NEC's stance. With a 90A circuit you could only charge at 72A. OpenEVSE goes in 2A steps. in any event while I am sure that 100A or better contactors exist I am sure that they are expensive, They would be industrial items . Chris charges $123 for his 90A unit. He makes only a small profit on it. Not like the 40% mark up some suppliers use. I do not want to run any contactor at its limit. on a 90A contactor the most I would pull is 60A. For example I use a 65A contactor at 40A. With that reserve it runs very cool. Not like a Chinese 50A contactroor previously Used.

Your OpenEVSE unit has a 30A Potter and Brumfield relay and a 30A Ji772 cable. 30A leaves no reserve. A enhanced Leaf draws 27.5A leaving only a small reserve. Early Tesla's used that same relay at 40A. If it suddenly opened at that current then it was warranty time. The relay is only rated to pass 40A, not switch it. In Teslas' defense they spot welded all connections. but still that poor relay!
Last edited by GlennD on Wed Dec 26, 2018 6:05 pm, edited 1 time in total.
:
2013 Pearl White SL Premium
Traded for a Cirrus White 2014 Mercedes B (totaled)
2016 Urano Gray eGolf SEL w/ drive assist
Loved the VW but it sat too low for my old body
Back to a Cirrus White 2017 B250e
White Ioniq limited.It sits just fine

GlennD
Forum Supporter
Posts: 1493
Joined: Sun Dec 18, 2011 7:14 pm
Delivery Date: 20 May 2013
Leaf Number: 410357
Location: Anaheim

Re: OpenEVSE support

Wed Dec 26, 2018 5:53 pm

J1772 cables are used at their max but the input cable and the contactor should be sized as per the NEC. My 40A EVSE has #6 L wires, A 50A breaker and a 63A contactor. The J1772 cable runs warm at 40A but not hot. Everything else runs cold, I had a 40A input cable for a while (after experiencing the VW) and at 40A it ran warm. At 30A it ran stone cold. It is my guess that ranges rarely draw full current and that is where the cable comes from.
:
2013 Pearl White SL Premium
Traded for a Cirrus White 2014 Mercedes B (totaled)
2016 Urano Gray eGolf SEL w/ drive assist
Loved the VW but it sat too low for my old body
Back to a Cirrus White 2017 B250e
White Ioniq limited.It sits just fine

GlennD
Forum Supporter
Posts: 1493
Joined: Sun Dec 18, 2011 7:14 pm
Delivery Date: 20 May 2013
Leaf Number: 410357
Location: Anaheim

Re: OpenEVSE support

Sat Dec 29, 2018 9:04 pm

Well I have updated the EVSE that was given to me and it is ready. A am ashamed to say I was too sick to get details. It is stupid on my part to not get contact info.
:
2013 Pearl White SL Premium
Traded for a Cirrus White 2014 Mercedes B (totaled)
2016 Urano Gray eGolf SEL w/ drive assist
Loved the VW but it sat too low for my old body
Back to a Cirrus White 2017 B250e
White Ioniq limited.It sits just fine

GlennD
Forum Supporter
Posts: 1493
Joined: Sun Dec 18, 2011 7:14 pm
Delivery Date: 20 May 2013
Leaf Number: 410357
Location: Anaheim

Re: OpenEVSE support

Wed Jan 23, 2019 9:20 pm

The repaired EVSE was picked up by an x-ev owner. Michael went back to a VW oil burner. I guess the EVSE will sit a while. It worked fine for me but I got a chance to upgrade it. It now has the latest firmware and I corrected a minor board layout problem. I also soldered the P&B relay.
:
2013 Pearl White SL Premium
Traded for a Cirrus White 2014 Mercedes B (totaled)
2016 Urano Gray eGolf SEL w/ drive assist
Loved the VW but it sat too low for my old body
Back to a Cirrus White 2017 B250e
White Ioniq limited.It sits just fine

Oilpan4
Gold Member
Posts: 886
Joined: Wed Jan 09, 2019 10:51 pm
Delivery Date: 10 May 2018
Leaf Number: 004270

Re: OpenEVSE support

Thu Jan 24, 2019 7:01 pm

I was looking at the open evse site I like it.
When it's time for a 40 amp or bigger charger I'm getting mine from open evse.
Actually if my granny charger or duosida charger quits I will probably replace it with a open evse.

GlennD
Forum Supporter
Posts: 1493
Joined: Sun Dec 18, 2011 7:14 pm
Delivery Date: 20 May 2013
Leaf Number: 410357
Location: Anaheim

Re: OpenEVSE support

Fri Jan 25, 2019 1:01 pm

Assuming everything else will handle the current you can just change the cable to 49A and set the OpenEVSE current to match. In my case I already had a 63A contactor and a 50A range input cable.
:
2013 Pearl White SL Premium
Traded for a Cirrus White 2014 Mercedes B (totaled)
2016 Urano Gray eGolf SEL w/ drive assist
Loved the VW but it sat too low for my old body
Back to a Cirrus White 2017 B250e
White Ioniq limited.It sits just fine

GlennD
Forum Supporter
Posts: 1493
Joined: Sun Dec 18, 2011 7:14 pm
Delivery Date: 20 May 2013
Leaf Number: 410357
Location: Anaheim

Re: OpenEVSE support

Fri Jan 25, 2019 1:10 pm

The J1772 cable runs at the rated current. I really do not want to push the rest. I do not bevel in running 40A through a 40A relay and input cable. An EVSE is a continuous load and the parts should reflect that. I burned up a Chinese 50A contactor with a 30A load.
:
2013 Pearl White SL Premium
Traded for a Cirrus White 2014 Mercedes B (totaled)
2016 Urano Gray eGolf SEL w/ drive assist
Loved the VW but it sat too low for my old body
Back to a Cirrus White 2017 B250e
White Ioniq limited.It sits just fine

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