thomash85715
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Re: EVSE Upgrade

Wed Apr 19, 2017 4:49 pm

I have read all ten pages of this and am knocked over by how smart and clever you guys are. Bravo!
Being new to all this, I am charging my newly acquired 2012 ES at level 1 8A with a first generation factory EVSE. What I really really want is to determine ONLY the work and parts needed to make my EVSE programmable to 6 or 8 or 12 at 120vac only. I have no interest in buying or doing a modification to go to L2 240vac. Unless I missed that part in the foregoing, the mods done by EVSEUpgrade and by you guys DIY all include going to Level 2 AND allowing variable amp rates at level 1. I don't want level 2, just programmable level 1. That just has to be possible, please! Thank you.
In an insane society a sane man would appear insane.
Acquired 2012 silver ES April 2017.

wmcbrine
Posts: 310
Joined: Wed Apr 29, 2015 10:26 am
Location: Laurel, MD
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Re: EVSE Upgrade

Wed Apr 19, 2017 6:34 pm

jray3 wrote:The charger will pull whatever the EVSE says it can give, up to16 Amps max whether 120 or 240 VAC.

It's also limited to 3300 W total, so only 13.75 A @ 240 V.

kiev
Posts: 476
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Location: The Heart o' Dixie
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Re: EVSE Upgrade

Wed Apr 19, 2017 8:29 pm

Go read the 62 pages over on the myleaf forum and you'll find that back in feb 2011 Ingineer Phil de-potted one of these EVSE units and reverse engineered the circuitry. He then started evseupgrade.com to offer this $300 upgrade.

By Nov 2011 the nytimes reported that over 15% of the 7000 leaf owners had bought this upgrade.

Phil now drives a top of the line tesla (you can do the math).

But it's tedious work to reverse engineer circuits and firmware, especially when the boards are potted, and it takes a lot of time. Once it's done it seems so simple and obvious, but he did the work and he doesn't share how to make the upgrade.

From what i can see in the pictures, there is a 3-pin header located next to the connector for the pair of small yellow wires. That is likely some sort of programming port that connects to a microcontroller on the potted board. If only i had a de-potted board...
kiev = kenny's innovative electric vehicle

JoeS
Site Moderator
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Location: Los Altos Hills, California

Re: EVSE Upgrade

Wed Apr 19, 2017 9:21 pm

thomash85715 wrote: ...I don't want level 2, just programmable level 1...
Here's the J1772 overview, and I'm sure some googling will provide you with schematics so you can design and build to suit your needs if you can't further reverse-engineer this Panasonic unit after going through both this forum and the Leaf forums. https://en.wikipedia.org/wiki/SAE_J1772

Look further, and for less time and effort you might find a really inexpensive 120vac 12A EVSE if you want more current, especially if you don't care about UL certification; however, beware, as worn-out 120vac wall outlets or cheap plugs may not handle 12A steady-state comfortably (ideally they shouldn't even get warm, and NEVER hot). The stock 8A provides a much better safety margin if you don't need the charging speed.

I don't understand your aversion to 240vac, as at some point you'll be wanting a quicker recharge during the day and you may want to invest in either a dedicated L2 EVSE or the EVSEUpgrade. Do you not have 240vac available at home?

Speaking of "Ingineer" Phil, in the early Leaf days he was a terrific source of information and was extremely helpful to everyone (he often came to the BayLeafs meetings). You should have seen his trailer-mounted turbine-powered range-extender. I, for one, do not mind supporting his little EVSEUpgrade.com company, and I consider his current-adjusting implementation to be simply brilliant.
EVs: 2 Wht/Blu SE Prem., '13 Tesla MS85, 3 156v CorbinSparrows (2 Li-ion), 24v EcoScoot(LiFePO4)
EV Conv: 156v '86 Ram PU, 144v '65 Saab 96
Hybrids: 48v1kW bike
ICE: '88 Isuzu Trooper. Mothballed: '67 Saab (orig.owner), '76 MBZ L206D RHD RV

thomash85715
Posts: 34
Joined: Sat Apr 01, 2017 9:05 am
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Re: EVSE Upgrade

Wed Apr 19, 2017 10:32 pm

My cars are in a big double carport, not in a garage. I have 120vac in the carport and 240vac in adjacent laundry room. All this is at opposite end of property from the 200 amp incoming service. The savings from abandoning gasoline could easily be eaten up by a few hundred bucks here and a few hundred more there...it is going to add up very fast if I start paying other people for upgrades. I do get it that a person who successfully hacks and reboots something to make it better should get a reward. I am just not in a financial position to pay retail for these devices. So I will just sort of give up I guess and use the 8A stock system.
Tonight I went to our local nissan dealer and spent a few minutes hooked up to the DCQC plug for free. A salesman floating around stated lots of people use it but it's never backed up with any kind of wait. It is about four miles from my house. When the graphic battery cartoon reached 82%, and my dashboard gauge mirrored that, the thing stopped and told me to disconnect, that I was "full." With the stock 120vac EVSE, the gauge went all the way to the top and range indicated 84 miles but this took 14 hours, not eight minutes!
In an insane society a sane man would appear insane.
Acquired 2012 silver ES April 2017.

phb10186
Posts: 242
Joined: Fri May 13, 2016 12:58 am
Location: North London suburbs, UK

Re: EVSE Upgrade

Thu Apr 20, 2017 2:03 am

I wonder if the charger from a 240v market may be the best option in the US???

So, UK runs 240V AC all domestic, and Europe is essentially the same, but technically varies between 220-230V AC.

Does a Leaf Type1 charger work on the IMIEV - if it does, you could, as long as your domestic sockets could handle it, get hold of a used 240v J1772 EV charger, and connect it to a domestic 240V outlet using an adapter or changing out the plug end. This way you could use a standard US outlet converted for 240V, not bother with a 240V L2 EVSE.

In basic terms, I charge the car with a L2 240V EVSE using a type2 to type1 32 KW capable charging cable. Thats fairly inconsequential as the I only charges at 3.6KwH/hour - so the net benefit of the EVSE is about 30 mins off the charge time for me:

6h, compared to 6.5 hrs using the mitsu supplied charging cable in to a domestic outlet.

The only reasons I bought an EVSE living in a 240v domestic market were as follows:

1. Contingency against failure of the mitsu charging cable, thus providing a 2nd option.
2. In case I get an EV that charges more rapidly in the future
3. Better water resistance
4. Option for a longer cable, as the standard one is 15 feet or so, and I use a 30 ft one for flexibility.
5. The government paid 70% of the costs.

If a 240V one would work, the £ is very weak at the moment, so you could take advantage of the relative weakness of the £ and get a 240V one.

...unless the car itself is different, which I do not know the answer to.

Interestingly, at this current time, there isnt one single IMIEV for sale in the UK anywhere... first time ive seen that occurrence.
2012 I-MIEV Keiko Silver 11K
2010 Insight ES-T 43K
2001 Accord Type-V (F23 manual)
2009 Hornet CB600F
2008 SH300

wmcbrine
Posts: 310
Joined: Wed Apr 29, 2015 10:26 am
Location: Laurel, MD
Contact: Website

Re: EVSE Upgrade

Thu Apr 20, 2017 8:56 am

thomash85715 wrote:When the graphic battery cartoon reached 82%, and my dashboard gauge mirrored that, the thing stopped and told me to disconnect, that I was "full." With the stock 120vac EVSE, the gauge went all the way to the top and range indicated 84 miles but this took 14 hours, not eight minutes!

That's normal. You can plug back into the DCQC to get to 100%, but it could take about as long to get from 82 to 100 as it does to get from 20 to 82, because it tapers off as it goes. That's why it stops where it does -- to give you a decent charge in a reasonable amount of time.

wmcbrine
Posts: 310
Joined: Wed Apr 29, 2015 10:26 am
Location: Laurel, MD
Contact: Website

Re: EVSE Upgrade

Thu Apr 20, 2017 8:59 am

phb10186 wrote:This way you could use a standard US outlet converted for 240V

Does not compute.

thomash85715
Posts: 34
Joined: Sat Apr 01, 2017 9:05 am
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Re: EVSE Upgrade

Thu Apr 20, 2017 10:47 am

Here in USA, our 240 outlets are in fact two hot out of phase 120 legs that together make 240. But in EU and UK, are all the plugs inside the house for TV, refrigerator, clocks, etc single phase with one 240 hot and a neutral plus ground? A EVSE made for a EU mitsu or leaf: is it a level 1 from a single ended single phase 240? If so, bringing one here and plugging it into a two phase two hot USA type 240 plug would not be in its best interest maybe? phb10186 you offer an intriguing idea...but just wondering what the reality of such a thing would look like. Am I missing something here?
I will investigate the reverse engineer pages when I have time read them all. I did ask EVSEupgrade if any of their products or kits would make my 8A stock mitsu EVSE a paper-clip programmable 12A level 1 only (not level 2) and they said no.
In an insane society a sane man would appear insane.
Acquired 2012 silver ES April 2017.

JoeS
Site Moderator
Posts: 3232
Joined: Thu Dec 15, 2011 5:47 am
Location: Los Altos Hills, California

Re: EVSE Upgrade

Thu Apr 20, 2017 10:54 am

thomash85715 wrote:...I have 120vac in the carport and 240vac in adjacent laundry room....Tonight I went to our local nissan dealer and spent a few minutes hooked up to the DCQC plug for free...It is about four miles from my house....
There will be times when you come back from a 50-mile trip in the morning and want to make another excursion in the afternoon, which 2-3 hours of L2 charging would give you. No reason why you couldn't run a 240vac e x t e n s i o n cord from your dryer out to an L2 EVSE by the car, for the few times you might really need it. I just checked on eBay and jray3 was spot-on about the Duosida EVSE at $228 with free shipping being a great deal for a combined 120vac/240vac EVSE that even comes with a plug for your dryer outlet. I doubt that you'd find a used EVSE with this feature for a better price.

That's nice of the Nissan dealership to let you use their CHAdeMO charger, especially for free. Make sure you let the manager know how much you appreciate that and even offer to pay for it or put some money in their coffee fund or something and try not to abuse the privilege. Despite it being only four miles from your home, you'll soon realize how inconvenient the gas-station model of going somewhere to charge really is. If that Nissan charger is available 24/7 then it's a godsend as a backup, especially if its on your normal route of going somewhere.
EVs: 2 Wht/Blu SE Prem., '13 Tesla MS85, 3 156v CorbinSparrows (2 Li-ion), 24v EcoScoot(LiFePO4)
EV Conv: 156v '86 Ram PU, 144v '65 Saab 96
Hybrids: 48v1kW bike
ICE: '88 Isuzu Trooper. Mothballed: '67 Saab (orig.owner), '76 MBZ L206D RHD RV

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