SMA Solar Technology AG 2 Safety
Installation Manual SI80H-60H-OffGrid-IA-en-11 13
AC sources in the stand-alone grid can be used for energy supply. Too much power from the
AC sources in the stand-alone grid can lead to system failures.
• Observe the maximum power from AC sources in the stand-alone grid that can be connected
to the AC1 terminal (see Section 12"Technical Data",page144). In a cluster, the powers of
the individual Sunny Islands are added to yield the total maximum power.
The Sunny Island uses batteries for energy storage. The rated voltage of the battery must correspond
to the DC input voltage. If the battery capacity selected is too low, system failures may result.
• Observe the recommendations for the minimum battery capacity connected to the DC terminal
(see Section 12"Technical Data",page144). For off-grid inverters connected in parallel on the
DC side (clusters), the recommended capacities of the individual Sunny Islands added together
yield yield the total minimum battery capacity.
A fuse-switch-disconnector, – e.g. a BatFuse, must be installed between the battery and the
Sunny Island.
DC loads and DC sources can be integrated into the off-grid system. If DC loads or DC sources other
than Sunny Island Charger 50 are included, a battery current sensor must be installed. The Sunny
Island is not suitable for establishing a DC distribution network.
The Sunny Island is not suitable for supplying life-sustaining medical devices.
• Never use the Sunny Island in systems in which a power outage might result in personal injury.
The Sunny Island can control various components in an off-grid system via two multi-function relays,
e.g. a load-shedding contactor. The multi-function relays are not suitable for controlling functions
which may endanger persons in the event of a malfunction in the multi-function relays – for example,
if there is insufficient redundancy in the ventilation of the battery room.
The enclosed documentation is an integral part of this product.
• Read and observe the documentation.
• Keep the documentation in a convenient place for future reference.
2.2 Qualification of Skilled Persons
Skilled persons must have the following qualifications:
• Training in off-grid systems from SMA Solar Technology AG
• Training in how to deal with the dangers and risks associated with installing and using electrical
devices and batteries
• Training in the installation and commissioning of electrical devices
• Knowledge and observance of the local standards and directives
• Knowledge and observance of this document and all safety precautions
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