E-MotorWerks JuiceBox - an open source 15kW EVSE

[emotorwerks]

It doesn't seem to stay set at what I set it to for very long before it changes back to a different value. I also fixed the grammar on your name since your code eats the single quote I had to get out the real apostrophe Making the URL light gray but perfectly readable doesn't count as blanking it out, nor does including your units full ID in the screenshot.

Pretty funny, thanks QueenBee! Perhaps Val's LEAF will suffer from a denial of service attack on its remote-controlled EVSE. That would be a first!

[dsinned]

I have been EAGERLY waiting for a JuiceBox cell app, the first WiFi enabled EVSE app of its kind! RIGHT ON!!! Which phone(s) will be supported first? I have an iPhone 5S, so I VOTE for Apple iOS.

KEEP UP THE GOOD WORK EMW!

[dsinned]

Yesterday, I noticed on the EMW "public" website, there is new firmware, V8.10.2. What hardware is this for and what if any new features are being introduced?

Also, how do we report "bugs" with the old firmware? For example, JB LCD display loses time - several minutes - every 24 hours.

Finally, what is the status of the CPUC sub-metering program? According to the EMW website with info about this program, the pilot program start date will be sometime in September/October. Is this accurate? I know of several posters, including myself, on the various EV online forums claiming to have applied for the program, and already set up accounts with OhmConnect. But, nobody here apparently has yet found out if they were accepted. Have all 500 spots been filled in PG&E territory?

Please provide a general status update as most everyone here is waiting to hear if they will be getting sub-metering JuiceBoxes. I'm sure some of us in CA may be waiting to order a regular JB until we hear if we qualified. TIA.

[bkinsl]

I have been EAGERLY waiting for a JuiceBox cell app, the first WiFi enabled EVSE app of its kind! RIGHT ON!!! Which phone(s) will be supported first? I have an iPhone 5S, so I VOTE for Apple iOS.

KEEP UP THE GOOD WORK EMW!

+1 Amen! iOS or Android, I got both!

[NeilBlanchard]

My brother ordered a JuiceBox Premium about a week before I did. Looking forward to having it.

I will add mine to PlugShare.

[Andolyn]

Yesterday, I noticed on the EMW "public" website, there is new firmware, V8.10.2. What hardware is this for and what if any new features are being introduced?

Also, how do we report "bugs" with the old firmware? For example, JB LCD display loses time - several minutes - every 24 hours.

Finally, what is the status of the CPUC sub-metering program? According to the EMW website with info about this program, the pilot program start date will be sometime in September/October. Is this accurate? I know of several posters, including myself, on the various EV online forums claiming to have applied for the program, and already set up accounts with OhmConnect. But, nobody here apparently has yet found out if they were accepted. Have all 500 spots been filled in PG&E territory?

Please provide a general status update as most everyone here is waiting to hear if they will be getting sub-metering JuiceBoxes. I'm sure some of us in CA may be waiting to order a regular JB until we hear if we qualified. TIA.

+1 I'm also waiting to hear. sent an E mail and was sent to someone else to inquire but have had no response?

[hill]

Both are a possibility. It looks like the LEAF is ramping down, since it might be nearly full. In my experience, it takes about 5-7 seconds to see the change reflected on the screen....snip.....

Hope this isn't too off topic - but with all the excitement seen with the Kia Soul spec's ... should there be any surprises should the juiceBox be used to charge Leaf's competitor? I'm thinking the possibility of 15kW's charging, to a 27kWh - 30kWh battery will be even more important.
.

[GlennD]

It does not matter how much current the EVSE offers as long as it is enough for the car. In this case you must supply 30A and that is all the car will take. You could have a 40A charger for a RAV4 EV but the car will only draw 30A.

There is two parts to the J1772 specification. If there is enough current offered the car will draw up to its max. I have a 32A OpenEVSE. My leaf draws 27.5A, Pchilds RAV4 EV drew 32A. A Volt would only draw16A. The car takes what it needs up to the max offered. Pchild's EV could draw 40A but it has to go with the 32A offered.

[dsinned]

I think what Glenn said may need further clarification. I have a RAV4 EV and also charge it at 32A from my JuiceBox, although it is capable of charging the car at 40A. The JB can have its current limiter set by the end user quite easily when it has the LCD and Remote Key Fob options. I have both. Therefore, I set the current limit to 32A. Using the buttons on the key fob, the limit can be changed "on the fly", in 1A increments. However, 32A is the maximum current that can be safely provided from my home's breaker box to the end of the J1772 cable and everything in between (i.e. the infrastructure wiring, AC outlet, input cord, and L2 EVSE). However, I still have the means of charging my RAV4 EV at 40A, by traveling with my JB in the car and plugging in to "50A" 240V AC outlet available at most RV Parks. Hence, the advantage of a "plug-in" EVSE is its PORTABILITY, which means the current rating of the AC outlet, fixed wiring and circuit breaker protection is really just another limiting factor. This is also why a convenient way to adjust the EVSE's internal current limiting - such as with a remote key fob in the case of a JuiceBox - is such an advantageous feature.

[GlennD]

I think what Glenn said may need further clarification. I have a RAV4 EV and also charge it at 32A from my JuiceBox, although it is capable of charging the car at 40A. The JB can have its current limiter set by the end user quite easily when it has the LCD and Remote Key Fob options. I have both. Therefore, I set the current limit to 32A. Using the buttons on the key fob, the limit can be changed "on the fly", in 1A increments. However, 32A is the maximum current that can be safely provided from my home's breaker box to the end of the J1772 cable and everything in between (i.e. the infrastructure wiring, AC outlet, input cord, and L2 EVSE). However, I still have the means of charging my RAV4 EV at 40A, by traveling with my JB in the car and plugging in to "50A" 240V AC outlet available at most RV Parks. Hence, the advantage of a "plug-in" EVSE is its PORTABILITY, which means the current rating of the AC outlet, fixed wiring and circuit breaker protection is really just another limiting factor. This is also why a convenient way to adjust the EVSE's internal current limiting - such as with a remote key fob in the case of a JuiceBox - is such an advantageous feature.

Any method of adjusting the pilot to set the max current works. You spent a great deal of money on your JuiceBox and you are proud of it. Any OpenEVSE with a display and select button can also set the current. The stock table goes by 5A steps from 10A to 80A. I edit it from 10A to 50A in 2 A steps. It could have 1A steps but that becomes cumbersome.