Technical Information

 Code References

Installing our EVEMS device will allow an electrician to exclude the EV charging portion of the residential electrical load calculation found in your codebook. (NEC part 625 of 2020 edition, CEC section 8-500 & 8-104(11) of 2018 & 2021 editions)

As a result, the effective load calculation of the electrical service will not change despite being able to charge an EV quickly for the majority, if not all, of the charging cycle each day. This is not just simply switching between two loads as that method is an inefficient way to control these loads and creates much longer off times as a result. To provide additional charging efficiency our EVEMS devices read instantaneous total service current 24 hours a day and constantly feed this into a computer that filters out things like problematic electrical fluctuations, inrush currents and things like these to better determine if there is the capacity for charging, or not. This will provide for the longest charge cycle without causing potentially damaging oscillations or unnecessary stoppages.

Our products are designed for electrical service sizes of 60A, 100A 125A, 150A & 200A and accommodate the most common EV charge rates up to using a 60A breaker. To add flexibility, we have also included a setting for other electrical devices that can tolerate load shedding.

When your EVEMS installation is completed, an additional safety feature puts all settings behind a built-in partition that keeps potentially curious customers from changing them and thereby creating dangerous situations and unnecessary call-backs. This provides for a safer and cleaner finished product.

In Canada, some have asked if putting our current monitoring devices on the lines side of a panel disconnect or main breaker would be an electrical code violation. This is addressed in CEC 6-212 (1) & (2). Although subrule one seems to indicate that this may be a problem, the second paragraph provides this specific clarification: "CEC 6-212 (2)* Notwithstanding Subrule 1), service equipment designed for accommodating current monitoring devices or other associated electrical equipment that must, for its operation, be connected to the line side of the service disconnecting means, shall be permitted". We have worked closely with both Provincial Agencies and Jurisdictions Having Authority or Inspection Agencies to address this and any other code questions. This proactive approach has allowed our approved products to operate as intended and be accepted as compliant. 

To address any space concerns, we have divided our current monitoring devices into two models to allow for smaller ones in the models for 100A service sizes and below (EVEMS240-100) and larger ones for the services sizes 100A and above (EVEMS240-200). This allows for our current monitoring devices to easily fit into the service area of a panel. As well, you will notice on our specifications sheet that the shape of our current monitoring devices are thinner on two sides to help them fit better in service areas.

For further information please contact us with your questions as we have on-staff electrician support personnel, and we are happy to work with electrical contractors and authorities having jurisdiction for a smooth adoption into new jurisdictions. 

 

 

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