H6 Hybrid Inverter - Installation & Operation Guide
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Copyright 2017 SolarCity Corporation. All rights reserved.
3.7.2 - Battery Pack
The SolarCity H6 inverter is designed for use with the Tesla Powerwall 2 battery only.
SolarCity recommends installing the battery pack within 35’ (10m) of the SolarCity H6
inverter to minimize any circuit noise pickup or voltage loss along the lines. Only install and
connect lithium-ion (Li-ion) battery packs that are specifically recommended for the
SolarCity H6 inverter. All wiring must be routed through conduit. The inverter includes a
dedicated 3/4” conduit hole for both battery pack high-voltage and communication (low
voltage) lines. The high-voltage connections are rated to 600VDC with a maximum current
rating of 25A and requires wiring that conforms to 310.15 ratings. The low-voltage lines must
also be rated to 600VDC in order to be grouped together in the same conduit. A shield wire
within the battery cable must be connected to a grounding terminal in order to prevent
electromagnetic noise from interfering with the communication wires. This shield wire must
terminate at the inverter end only. The battery pack may come with a 10’ (3m) low-voltage
communication cable for use when the distance between H6 and the battery pack is less
than 10’.
SolarCity recommends the following wiring gauges for the battery pack connections:
Note: NEC 310.15 specifies the wiring AWG to use.
Note: These values are subject to change. Please refer to the SolarCity H6
Inverter Datasheet for updated values.
CAUTION: FOLLOW THE TEMPERATURE MULTIPLICATION FACTORS
PROVIDED IN NEC 690.7 TABLE ALONG WITH THE VOLTAGE/TEMPERATURE
COEFFICIENT PROVIDED BY THE PV MODULE MANUFACTURER TO ENSURE
THAT PV STRING VOLTAGE REMAINS BELOW 570VDC UNDER ALL POSSIBLE
WEATHER CONDITIONS AT THE INSTALLATION LOCATION.
CAUTION: ALL WIRING MUST BE SIZED TO AT LEAST 167°C (75°F) PER NEC
TABLE 310.15(B)(16) AND RATED TO AT LEAST 194°F (90°).
WARNING: USE ONLY THE SPECIFIC MAKE AND MODEL OF BATTERY THAT
IS SPECIFICALLY RATED FOR USE WITH THE SOLARCITY H6 INVERTER.
THE USE OF ANY OTHER BATTERY TYPE OR MODEL COULD DAMAGE THE
INVERTER AND/OR THE BATTERY AND CAUSE DEATH OR PERSONAL
INJURY.
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