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Copyright 2017 SolarCity Corporation. All rights reserved.
Chapter 1 - Welcome
9.2.6 - RISO (PV Insulation Resistance Monitor)
Per NEC, every morning (24 hours) or upon restarting, the SolarCity H6 inverter checks the
PV impedance to verify that it exceeds the threshold set by UL 1741. This check can also
detect a ground fault situation.
9.3 - Standards & Directives
The SolarCity H6 inverter conforms to the following standards and directives:
• Enclosure Protection Rating: NEMA 4X
• Safety approval: UL 1741 (second edition) /SA /PVRSS, CSA 22.2 #107.1-01, UL 9540
• Software approval: UL 1998
• Isolation Monitor Interrupt (IMI): NEC 480, 690, and 705
• Grid Interconnection Standards: IEEE 1547, Rule 21, HECO (Rule 14H)
• EMC: FCC part B, ICES-003
• AFCI: UL 1699B (second edition), NEC 690.11
• PV Rapid Shutdown: NEC 690.12
9.4 - Communication
The SolarCity H6 inverter can be remotely monitored, upgraded, and programmed by
SolarCity via the ZigBee antenna. The inverter can also pass firmware upgrades to the battery
pack via the CAN interface.
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