Enphase Ensemble Technology System Planning Tech Brief

Planning an Ensemble Technology System – North America

Self Consumption Use Case

In Self Consumption scenarios, a homeowner’s PV system generation is stored in the Encharge storage system for

use later in the day when there is not sufficient power from Solar PV to supply the home loads. Homeowners benefit

by consuming the onsite-generated energy themselves instead of exporting it to the grid during the day and

purchasing power from the grid during evening and night times.

In customer self consumption scenarios, size the Encharge storage capacity to accommodate the expected daily

energy export. This is roughly less than two thirds of the average daily energy load of the home.

Economic Use Cases

There are many economic goals that the Encharge storage system supports. These include bill reduction, demand

charge reduction, and energy arbitrage. A special case of Self Consumption, called power export limiting, is

supported for applications where the utility does not allow a homeowner to export power from the PV system to the

grid. One example is the Hawaii self-supply and NEM+ programs where no export is allowed, which is called zero

export.

Optimizing energy storage capacity sizing for economic use cases is beyond the scope of this document. Simulation

tools like NREL SAM (System Advisor Model) or Energy Toolbase can be used to assist with sizing in these use

cases.