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load shedding/sharing devices

In my time as an electrical contractor I have had experience with 3 different EVEM/Load-Shedding/sharing Devices.  The AC-dandy Loadmiser, the simple-switch, and the black-box. The load miser is a automatic load shed control device that is manufactured south of Edmonton in Wetaskiwin. it is analogue and very robust and has a large relay and internal load monitoring devices. it can support integral outlets and breakers for secondary loads. The simple switch is lighter, digital and smaller overall than the Loadmiser big advantages are that it is silently and potentially waterproof. The black-box is the smallest of the lot it functions very similar to the Loadmiser but without the add-on options. I have installed the Loadmiser the most. I used it for a pool/hot-tub setup at an acreage. I used it for a air conditioner and I serviced a Loadmiser used as an EVEM for a doctors f-150 lighting. The pool/hot-tub setup was the first time I installed the device and I found it to be a smooth process. I hooked up with it's primary load as an outdoor pool heater/sub-panel. the secondary load was setup for a hot-tub however the hot-tub was not yet delivered. the customer was happy with the installation. The second installation was for an air-conditioned the plan was to have the homes range be the primary load and then use the Loadmiser to allow the AC to share with the range. this was not understood by the ac-installer and they did not connect the ac into the Loadmiser as a secondary load and I was called back to disconnect the ac from the main panel and connect it into the Loadmiser. additionally I was called back to change the secondary breaker in the Loadmiser as the ac installer had given the wrong sizing information. During the 3rd installation I was called to give a quote on a Loadmiser EVEM for a doctors F-150 lightning. the customer decided that my quote was too expensive and found an "old country" electrician that would install the system for cheaper. the other electrician did a good job installing the device however I was called back when the Old country guy struggled with troubleshooting an error caused by a manufacturer error. I determined after some testing that AC-dandy had improperly calibrated the CT monitors in the device and they came back to fix their error. I installed a simple-switch for a customer in south Edmonton who was kitting his home out with a legal suite. he needed the ac on the home to share with the main range to allow the property to pass a load calculation. the simple-switch came in handy as the mechanical room was very full of equipment for the secondary suite. I would have struggled to find space for the large Loadmiser. I used the simple switch to control the two loads and a small sub-panel to protect the cable of the ac-system. with having 2 different boxes I found it easier to fit the equipment into the space. I installed the black-box as an EVEM to control a 24amp EV charger for a homeowners new PHEV. The black box was easy to install next to the main service entrance box due to its small size. the small relay also made less noise than the larger version employed in the Loadmiser. Each device has it's advantages and i would install all of them again depending on what the circumstances were of the installation https://www.aelectric.ca/3-different-evem-...