Solis Energy Storage Inverter & Autotransformer Installation
In this video, a Solis expert explains how backup power is useful for the homeowner for a variety of reasons. Batteries are helpful when it comes to storing solar energy for time of use, self-consumption, and zero net exports, but most importantly, they provide backup power during power outages. No matter a homeowner’s location, they are potentially subject to power grid outages, which further stresses the importance of having an inverter capable of energy storage.
In this case, a Solis 240-volt single-phase 10kW inverter with 6kWh of energy storage capacity is being used, along with a 6kW autotransformer. The autotransformer is a necessary component of the energy storage system in the event of a power outage. At this time, a center tap neutral must be applied to bring the voltage of the circuit from 240-volts to 120-volts, hence the need for an autotransformer.
The autotransformer can provide 6kW on either side of the 120-volt circuit or split depending on the setup of the system. It’s also possible to have all 120-volt loads on one side of the transformer, despite this often being impractical for the homeowner. This is simply just an example that demonstrates the capabilities of the autotransformer.
To mount the autotransformer, an installer should use the Solis mounting bracket, spacing the autotransformer 16 inches above the floor and 14 inches away from any other equipment. Additionally, the backup loads panel as viewed in the video would be placed next to the main house panel. This will allow the homeowner to easily select the preferred circuit breakers from the house panel to be put into the backup loads panel in preparation for a power outage.