AlanSqB
Posts: 282
Joined: Mon Aug 04, 2014 5:33 pm
Delivery Date: 26 Jul 2014
Leaf Number: 300613
Location: Fort Collins, CO

Re: OpenEVSE - Open Source Charging Station

Sat Dec 26, 2015 3:40 pm

Maybe consider dropping the dual voltage requirement. The advantage of using the OpenEVSE instead of the stock unit on 120v is negligible.

After a cooked relay (my fault) I just switched over to an inexpensive definite purpose contactor like the one Chris sells and in the process gave up dual voltage, but in two years I've never used my OpenEVSE on 120 so it was no loss. The simplicity and the robustness of the contactor makes me feel better about the whole system now. The removal of the fuses and crimped connections got rid of multiple potential failure points (including my less than perfect crimps).

Whatever you chose, be sure to let us know and share some pics.
2015 LEAF SV in Gunmetal Gray
"The only gas in this vehicle comes from the driver."
I drive a LEAF, it doesn't have Ludicrous or Insane mode. It only has Slightly Annoyed mode.

GlennD
Forum Supporter
Posts: 1076
Joined: Sun Dec 18, 2011 7:14 pm
Delivery Date: 20 Jul 2013
Leaf Number: 410357
Location: Anaheim

Re: OpenEVSE - Open Source Charging Station

Sat Dec 26, 2015 3:59 pm

camasleaf wrote:Thank you Glenn. I will likely go with a 40A contactor and sell my SSRs and my 40A semiconductor fuses (they are big). I know that the car dictates the current, but if I spend the money and put the effort into building an EVSE I want to have the full 40A continuous capability. I am not sure how I will make it work at 120V, I am still brainstorming about that.


If you go with the Chinese relay it has a 12V coil so it will work on either 120V or 240V.

By the way, the 40A cable from Quick Charge power that Chris sells has a cable that is about the size of an ITT L1 cable. Using paired #12 wires makes it very small.

I have ordered half a dozen relays from AliExpress. Just do not give them your main email address since they spam it to death. They cost about $15 shipped. You can also get it from the JuiceBox people but it is $15 plus shipping and sales tax in California. I have got relays from 3 separate companies all with the same part number. It truly seems like a generic part.

If you are local and replace the relay you can have my spare. I try to keep spares so I can support the units I have constructed. So far none have been needed.
2012 Cayenne Red SL traded for:
2013 Pearl White SL Premium
Traded for a Cirrus White 2014 Mercedes B (totaled)
2016 Urano Gray eGolf SEL w/ drive assist

jpadc
Posts: 242
Joined: Sat Dec 13, 2014 7:25 am
Delivery Date: 20 Dec 2014
Location: Indiana & Wisconsin

Re: OpenEVSE - Open Source Charging Station

Sun Dec 27, 2015 1:22 am

AlanSqB wrote:Maybe consider dropping the dual voltage requirement. The advantage of using the OpenEVSE instead of the stock unit on 120v is negligible.

Except a LEAF (with the 6.6 kW charger) will charge at 27.5 amps on 120 volts (although not part of the original J1772 protocol) if you have an EVSE capable of delivering that current level (with a NEMA TT-30R RV type supply outlet common in campgrounds) and it will charge about twice as fast on such current than with the stock unit. Most every US campground that has electric service offers 120 volt 30 amp service, but you might not want to look too closely at the wiring behind that plug at a lot of them. :o
2013 Leaf S /w Charge Package - Purchased new in Iowa City Dec. 2014
My previous car was a 2008 Prius Touring Package 5 - 73k Miles, 43 MPG lifetime

GlennD
Forum Supporter
Posts: 1076
Joined: Sun Dec 18, 2011 7:14 pm
Delivery Date: 20 Jul 2013
Leaf Number: 410357
Location: Anaheim

Re: OpenEVSE - Open Source Charging Station

Sun Dec 27, 2015 3:23 pm

jpadc wrote:
AlanSqB wrote:Maybe consider dropping the dual voltage requirement. The advantage of using the OpenEVSE instead of the stock unit on 120v is negligible.

Except a LEAF (with the 6.6 kW charger) will charge at 27.5 amps on 120 volts (although not part of the original J1772 protocol) if you have an EVSE capable of delivering that current level (with a NEMA TT-30R RV type supply outlet common in campgrounds) and it will charge about twice as fast on such current than with the stock unit. Most every US campground that has electric service offers 120 volt 30 amp service, but you might not want to look too closely at the wiring behind that plug at a lot of them. :o


I can verify that the Leaf will charge at 27.5A at 120V. You can modify the OpenEVSE L1 current table or simply force it to use the L2 table. The display will say L2 but that is no big deal. The EVSE does not really care about voltage. It is simply modifying the pilot duty cycle.
2012 Cayenne Red SL traded for:
2013 Pearl White SL Premium
Traded for a Cirrus White 2014 Mercedes B (totaled)
2016 Urano Gray eGolf SEL w/ drive assist

camasleaf
Posts: 594
Joined: Sun Sep 26, 2010 5:20 am
Delivery Date: 17 Jun 2011
Location: Camas, WA

Re: OpenEVSE - Open Source Charging Station

Sun Dec 27, 2015 5:10 pm

jpadc wrote:Most every US campground that has electric service offers 120 volt 30 amp service


I have never looked at the RV plugs at the campgrounds. But if they have 120V 30A does that mean they do not have the 240V (30-50A)?
2011 SLe 06/17/11 Over 62000 miles, GID 222; 52.64AHr; 80%SOH; 17.2kWh
2015 SV 09/02/14, Over 15000 miles, GID 287; 61.12AHr; 98%SOH; 22.2kWh
5.7kW DC System: 13-14 6725kWh; 14-15 7920kWh

GlennD
Forum Supporter
Posts: 1076
Joined: Sun Dec 18, 2011 7:14 pm
Delivery Date: 20 Jul 2013
Leaf Number: 410357
Location: Anaheim

Re: OpenEVSE - Open Source Charging Station

Sun Dec 27, 2015 6:23 pm

Many RV sites have 14-50 240V sockets. I have users say that some are cop out with both l lines strapped to 120V. It would be nice to check before plunking down your money. If the RV uses an L to Neutral than they will not notice. Plainly L to L would then be zero voltage.
2012 Cayenne Red SL traded for:
2013 Pearl White SL Premium
Traded for a Cirrus White 2014 Mercedes B (totaled)
2016 Urano Gray eGolf SEL w/ drive assist

GlennD
Forum Supporter
Posts: 1076
Joined: Sun Dec 18, 2011 7:14 pm
Delivery Date: 20 Jul 2013
Leaf Number: 410357
Location: Anaheim

Re: OpenEVSE - Open Source Charging Station

Sat Feb 20, 2016 11:02 am

Lately I have been playing with a drop in replacement VFD display.

http://www.digikey.com/product-detail/e ... ND/2177072

It is available on Ebay for 37.20 shipped from Texas.

It only uses 14 pins. The color pins are unused so I ran a RGB LED from them. The cyan filter is brighter but I like the blue one best. I got a 4 color Neewer set from Amazon.

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2012 Cayenne Red SL traded for:
2013 Pearl White SL Premium
Traded for a Cirrus White 2014 Mercedes B (totaled)
2016 Urano Gray eGolf SEL w/ drive assist

DavidGreene
Posts: 10
Joined: Wed Jan 20, 2016 9:43 pm
Delivery Date: 15 Jan 2016

Re: OpenEVSE - Open Source Charging Station

Sat Feb 20, 2016 11:55 am

GlennD wrote:Lately I have been playing with a drop in replacement VFD display.


Wow Glenn, that is really nice! Do you have a project page somewhere for this, including the enclosure? We're looking at OpenEVSE for our L2 charger. We are new Leaf owners.

GlennD
Forum Supporter
Posts: 1076
Joined: Sun Dec 18, 2011 7:14 pm
Delivery Date: 20 Jul 2013
Leaf Number: 410357
Location: Anaheim

Re: OpenEVSE - Open Source Charging Station

Sat Feb 20, 2016 1:41 pm

I used to post here but Mike, the forum owner decided I had too many posts and he removed my listings. He wanted me to become a vendor. Since I built OpenEVSE's at cost to keep busy that is not going to happen.

I have basically stopped building OpenEVSE's unless I get a really good deal on the parts so it does not hurt to sit on the unit for a while.

I encountered the VFD on the Trimble Thunderbolt page and I taught they were neat. They are brighter then the LCD displays even with a blue filter.

If you want a complete EVSE then look into Clipper Creek's web site. Unlike most they have the required circuit not the charging current in their Model numbers.

Chris Howell offers OpenEVSE stuff at his web store. You can buy complete kits or if you are a geek like me, just buy what you need.
2012 Cayenne Red SL traded for:
2013 Pearl White SL Premium
Traded for a Cirrus White 2014 Mercedes B (totaled)
2016 Urano Gray eGolf SEL w/ drive assist

GlennD
Forum Supporter
Posts: 1076
Joined: Sun Dec 18, 2011 7:14 pm
Delivery Date: 20 Jul 2013
Leaf Number: 410357
Location: Anaheim

Re: OpenEVSE - Open Source Charging Station

Sat Feb 20, 2016 1:50 pm

Here is a link to Chris' store. He also has posted tutorials that can help your understanding.

http://store.openevse.com/
2012 Cayenne Red SL traded for:
2013 Pearl White SL Premium
Traded for a Cirrus White 2014 Mercedes B (totaled)
2016 Urano Gray eGolf SEL w/ drive assist

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