Setting up Enphase
Power Control (EPC)
Introduction to Enphase’s Power Control (EPC)
The Enphase Energy System supports four Enphase Power Control
(EPC) use cases:
1. Main panel upgrade (MPU) Avoidance Mode with PV current
limiting: This feature, applicable in a partial home backup & a
grid-tied PV only scenario, limits the current backfeed into the
main panel and removes the need to upgrade the main panel,
reducing costs for the homeowner and eort for the installer.
The National Electric Code (NEC) 2020 705.12 allows back feed
of current from solar/storage into the main panel subject to the
following limit:
Backfeed allowed <= ((120% of busbar rating) – Ampacity of the
overcurrent protection device protecting the busbar)/125%
2. IQBattery Oversubscription Mode: This feature limits the
charge/discharge current and enables more battery capacity
to be installed in grid-tied systems. The feature ensures that
the total continuous output current from the batteries does
not exceed 80% of the battery breaker rating.
3. Aggregate power export limit: This feature ensures that
the aggregate power exported to the grid is limited to the
aggregate power export limit (PEL) dened by the installer.
4. Battery Import Only Mode for Enphase Energy System: This
feature ensures the IQBattery 5P never exports any power
to the grid. This applies irrespective of the congured battery
smart prole, i.e., Self-Consumption, Full Backup, or Savings
(time of use) with optimization.
# IQSYSTEMCONTROLLER SKU PRODUCT NAME
MAXIMUM NO. OF
IQBATTERY P
MAX ENERGY
KWH
MAX POWER KW
1 SC200D111C240US01 IQ System Controller 3 16* 80 kWh 30.72 kW
2 SC200G111C240US01 IQ System Controller 3G 8 40 kWh 15.36 kW
* Maximum of eight each on IQBattery port and additional IQBattery port.
Section F - Operation
IQ Combiner 5/5C Quick Install Guide43
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