6 Electrical Connection
SMA Solar Technology AG
Operating manual
SI44M-80H-13-BE-en-15
34
6.3
Inserting the Micro SD Card
The optional micro SD card extends the data storage capacity of the inverter (see Section 16.14, page 182). The
micro SD card can be ordered as an optional accessory from SMA Solar Technology AG or purchased via specialist
retailers. Perform the following steps to insert the micro SD card.
NOTICE
Damage to the inverter due to electrostatic discharge
Touching electronic components can cause damage to or destroy the inverter through electrostatic discharge.
• Ground yourself before touching any component.
Requirements on the micro SD card:
☐ A micro SD card must be used. Other memory cards (e.g. MMC cards) may not be used.
☐ Data storage in the FAT16/32 file format must be possible.
☐ Minimum storage capacity: 1 GB
☐ Maximum storage capacity: 64 GB
☐ Quality: industry standard
Requirements:
☐ The microSD card must be available.
☐ The inverter must be disconnected from all voltage sources (see Section 12, page 126).
Procedure:
1. On the Sunny Island, remove all screws of the lower enclosure lid using an Allen key (AF 5) and remove the
enclosure lid. Retain the screws and conical spring washers for later use.
2. Insert the micro SD card into the slot up to the stop. Do not jam the micro SD card when doing so.
3. Ensure that the micro SD card is correctly plugged in.
6.4
Connecting the Grounding Conductor with a Grounded Battery
If you ground the battery, you can ground it at the positive terminal or at the negative terminal with a grounding
conductor. SMA Solar Technology AG does not recommend grounding the battery. If the battery is grounded, the
enclosure of the Sunny Island must also be grounded. This additional grounding is no substitute for the grounding at
connections
AC1
und
AC2
.
Cable requirements:
☐ Material: Copper wire
☐ Minimum conductor cross-section: 10 mm² (or 2x 4 mm²)
☐ Maximum conductor cross-section: 16 mm²
☐ The cross-section of the grounding conductor must comply with the locally applicable standards and directives.
☐ The cross-section of the grounding conductor must be sized in accordance with the requirements of the external
battery fuse.
☐ The cross-sections of the battery grounding conductor and Sunny Island inverter grounding conductor must be the
same.
Procedure:
1. Calculate the cross-section of the grounding conductor. Observe all locally applicable standards and directives
when doing so.
