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Electrical Connection
5.3.1 PV string (DC) connection
DANGER!
Danger to life due to high voltages on the Sunny Boy!
• Before connecting the PV generator, ensure that the line circuit breaker is switched
off.
Use of Adaptors
Adaptors (branch connectors) are not to be visible or freely accessible in the immediate
surrounding of the Sunny Boy, in order that the DC circuit is not disrupted as a result.
• Always disconnect the current flow first via the Electronic Solar Switch.
Procedure for DC connection
1. Remove the Electronic Solar Switch on the underside
of the Sunny Boy.
NOTICE!
Excessive voltages can destroy the measuring device!
• Only use measuring devices with a DC input voltage range up to at least 800 V.
2. Check that the PV generator connectors have the
right polarity and do not exceed the maximum
string voltage of 750 V (DC). See also section
5.1 "Overview Connection Area" (page 14).
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SB3300TLHC-IEN094121
SMA Solar Technology AG
Installation Guide
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