Load Sharing Use and Setup

Kris Kluzak -

The first thing you will need is two JuiceNet enabled devices.  This includes our JuiceBox Pro 40,  Pro 40 Lite, Pro 75, Clipper Creek HCS-40 with JuiceNet, and AeroVironment EVSE-RS30 with JuiceNet. 

For your electrician:

Code for Load sharing (NEC)

625.41 Electric Vehicle Supply Equipment Circuit Ratings

Former 625.14 has been revised and relocated to 625.41 as a result of Article 625 being reorganized. A new last sentence that includes provisions for an automatic load management system has been added to 625.41. The maximum electric vehicle supply equipment load on a service and feeder shall be the maximum load permitted by the automatic load management system. This revision provides relief from service upgrades in some cases, but an automatic load management system has to limit the load on the service to its capacity.

 

For load sharing, these work for splicing the wires together so that you can have 2 outlets on one circuit. I suggest a junction box between the two outlets for ease.

This insulated, multi-cable connector block is big enough or either the #6 or #4/3 size wire. When sharing a 100A circuit they would need the #4 and up (for 2 pro 75 units only).  You will need two of these, one for each hot leg, and you should be able to use a large wirenut or similar connector for the grounding wire.




For you:

Once you have them wired up and connected to WiFi, please add them to a new Load Group. It will allow a combined output per the NEC 125% rule. For example, a 50 amp circuit for two Pro 40 units would split the available 40A.


To set up a Load Sharing Group, follow these steps:
Go to dashboard.emotorwerks.com and login (same as your app login) and under My JuiceNet select Load Groups.


Select + New Load Group and give it a name and shared amperage rating (this is 80% of the circuit breaker)


When selecting the amperage limit for the group (this is remembered even if offline), please follow this chart:
100A circuit breaker = 75A Maximum Current (A)
50A circuit breaker = 40A Maximum Current (A)
40A circuit breaker = 32A Maximum Current (A)
30A circuit breaker = 24A Maximum Current (A)
20A circuit breaker = 16A Maximum Current (A)


Now click on the group name to add the JuiceBoxes in your account

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Select from your list, if you have 2 JuiceBoxes, you will see 2 to select. Check them and select "add selected."

The boxes will default to 8A, and will start there, and they will check to see if it is sharing so as not to trip the circuit before it gets the server command. When one car is charging, it will get full charging capabilities. When the second car plugs it it will start at 8A, then ramp up to 50% and the first car ramps down to 50%. As one car tapers off, the other will increase so that all available amps are able to be used as needed.


 

That's it, please note that if your server connection is lost the Load Share group will default to the offline amperage rating of 8A for safety.

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