Getting started

Dynamic Load Management allows managing multiple chargers on a site that has restrictions on the level of current that can be used due to fuse or other limitations. DLM allows you to set up the max current the site can use and then dynamically adjusts the currents for each socket on the site based on how much current is available.

caution

eMabler Dynamic Load Management is working only with chargers that support Smart Charging Profiles

Smart charging is a method of optimizing charging schedules and power usage to minimize energy costs and ensure on-time vehicle departures.

By using Dynamic Load Management following benefits are achieved:

• Utilize the limited current to its fullest
  • Even with smaller fuse sizes better service level can be achieved
• Cost savings
  • No need to update electrical infrastructure to add more chargers
• Manufacturer independent
  • eMabler DLM uses Smart Charging Profiles to manage load management, which allows to use different chargers from different manufacturers on the same site
• Use of external meters
  • By adding external meter to DLM you can take other current usage in site into consideration when protecting fuses

Dynamic Load Management is enabled on site settings and follows the site structure, so please create the sites in eMabler UI to match the real world electrical circuits.

Example case for Dynamic Load Management

The following picture describes an example setup using our Dynamic Load Management

There can be several charging points installed in the same location but on different levels of the parking garage. In this setup the algorithm from eMabler works like this:

• If there is only consumption in Group D and no other groups. Cars connected to chargers in Group D get a total maximum of 100A
• If there is consumption in both Groups D and E the limiting factor for maximum consumption comes from their parent Group B. Groups D and E cannot exceed 100A on their own but also their combined consumption will not exceed 150A
• If there is consumption in Groups E, D and B the groups cannot exceed their own maximum, but the total maximum is Group A and its 200A
• The same goes if there is consumption in groups C and F where the maximum comes from Group A 200A (which would not be exceeded anyway as C and F already have a 100A limit)
• If there is only consumption in group F or only in group C the maximum is that groups 100A

External metering

Sometimes it’s not enough to know the fuse size of an installation to safely allocate current to electric vehicle charging. This situation usually arises when the EV charging-related fuses are shared with other loads. As these other loads are not generally able to report their power consumption, an external energy meter can be added to a load management group to account for their power draw.

Any load management group can be fitted with an external meter, and threshold values can be set to reduce the power available to the chargers when needed.

Cloud-based external metering is best suited for situations where the additional loads in the circuit account for only a part of the total breaker capacity and where large changes in non-charging power consumption happen relatively slowly (in a matter of a minute, rather than a matter of under 1 second). Good use cases include multi-zone lighting and -heating or power outlets. Local, hardware-based load management is better suited for use cases like large motors with high inrush current.

Setting up external metering consists of the following steps:

• Network configuration to allow the meter to communicate with eMabler
• Meter configuration to enable sending of meter values to eMabler
• Installation of the meter to the site
• Creation of load management group (if none exists)
• Adding the meter to the load management group via eMabler UI
• Setting up meter behaviour with the desired load reductions and threshold levels.