Regulatory, Compliance & Metering
Enphase Microinverters are CSA listed per the requirements of UL1741, and are therefore approved to operate in the United States and Canada. For more information about meeting regulatory and compliance requirements with Enphase products, please look at these resources or contact our technical support department.
- Connectors as AC Disconnects in PV Applications: Interpreting NEC Requirements
- Microinverter DC Disconnect Requirements in PV Applications: Interpreting the National Electric Code
- Meaning of Utility Interactive
- Enphase Tech Brief – Verifying Five-Minute Timer Protective Requirements for Utility-Interactive Inverters
- Enphase Application Note – Revenue Grade Metering and Performance-Based Incentives (PBI)
- Enphase Tech Brief – Power Quality Considerations for M215
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Frequently Asked Questions
Are Enphase devices UL-approved?
When I use the CSI EPBB calculator and specify Enphase Microinverters, I get a warning/error message that says:
'This inverter requires the addition of a meter/display to qualify for the CSI program. The CSI program requires that all EPBB customers install a ±5% or better meter. Please refer to section 11 of the CSI Handbook or the California Energy Commission's List of Eligible System Performance Meters.'
Are Enphase systems eligible for rebates in the state of California?
Yes, Enphase is indeed qualified equipment for California’s CSI EPBB program. The confusion arises because Enphase has a separate meter display (i.e., not built into the inverter itself). Our meter display is the Envoy/EMU. The Enphase meter is a qualified 5% meter, as can be verified by looking at the CSI list of qualified meters. The CSI warning message is simply a reminder that if using Enphase, the Envoy must also be specified. We recommend that you download the Enphase CSI EPBB Letter and submit it along with your CSI paperwork to ensure there is no confusion.