inverters with SetApp configuration – Application Note . ( PRI) and how to configure the system for DRM 0. Version History • Version 1.2, Nov 2023: Replaced term zero export with zero
Specify whether the inverter functions as a master or a slave. In a system with a single inverter, designate it as the "master." For setups with multiple inverters connected in parallel, assign
In response to the new standards requirements, some inverter manufacturers have redesigned their inverters to incorporate full DRM functionality. These inverters are referred to as DRM ‘compliant’, and within the AC Solar sector, Enphase Energy inverters are currently the only fully compliant microinverter available.
So while support for all demand response modes is not currently mandatory, all inverters are required to support demand mode DRM 0 (which disconnects the inverter when the signal is received). Why would a solar system owner be interested in implementing DRM functionality?
AS4777.2:2015 Section 6.2.1 states: “ The inverter shall support the demand response mode DRM 0 of Table 5. The inverter should support the other demand response modes of Table 5.”
In order to control an inverter via Demand Response Modes (DRM) according to AS4777.2:2020, the Fronius DRM Interface must be installed in the inverter. 2x TX25
These inverters are referred to as DRM ‘capable’ but an additional module is required to be purchased and installed on the inverter, which could cost the system owner $1,000 or more should they want or need to implement the DRM capability in the future.
When you purchase Enphase microinverters and install them with the Envoy-S Metered+DRM communications gateway, the entire system is DRM compliant and ready to accept and respond to DRM signals. Many string inverters, including the SMA Sunny Boy range, do not come standard with the DRM functionality.
