EVSE solution provider Koben Systems has announced a new integrated system designed to reduce demand charges in large-scale Level 2 charging installations.
Koben’s Evolve EVSF is aimed at multi-unit dwelling (MUD) and workplace locations. Utility demand charges may not be a concern for locations with 1-10 chargers – most complexes can accommodate the power. But as construction by-laws and building codes increasingly mandate adequate EV infrastructure, a large complex might require 150 or even more Level 2 chargers.
“Current systems which use load sharing/splitting or load balancing are simply not enough when planning for the future. EV batteries are increasing in capacity, which extends charge time,” says Koben Systems CEO Vic Burconak. “With 24-hour days, current systems cannot deliver the full charge EV drivers want. The Chevy Bolt, for example, has a 60 kWh battery; using load balancing over two connectors, the power delivered is 3 kW. With a 100 kWh battery such as Tesla, well…33 hours to charge is not practical.”
Evolve EVSF uses store and forward technology to deliver the full rate of charge while optimizing charging time. The system captures energy from the grid during times of low demand and releases it during peak times, significantly reducing demand charges.
The system is designed to be grid-friendly, and can be installed in areas with a constrained grid. Koben says demand charge savings can be up to 80%, or even 100% if solar energy is incorporated.
“High installation and infrastructure costs are still a barrier, and most buildings will not be able to support the type of power required in a few short years,” says Burconak. “Condo boards and committees are struggling with the reality of not enough electrical capacity, and most reserve funds will not accommodate [the expense of demand charges].”
Source: Koben Systems